18.04.3 + Intel device Wireless-AC 9560: periodic wifi disconnects

[A.C.]

I am running Ubuntu 18.04.3 LTS on a System76 Galago Pro laptop with the Intel wifi device in the title. From dmeg:

iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560 160MHz, REV=0x354

The problem is that the wifi connection to a 5 GHz network periodically drops. The dmesg warnings say that the connection to my access point (48:5d:36:67:ee:3c in the logs I am about to paste) has been lost. The problematic wifi connection has ESSID 'boomerang'.

You'll see a single instance of a lost connection in this dmesg, but note that power management is off: I ran

sudo iw wlp0s20f3 set power_save off

once at the beginning of this session.

These disconnects used to happen much more frequently and in clusters with power management on. I cannot be sure this is what's doing it though: the clusters would happen sporadically and seemingly randomly. I could not discern a pattern to what is causing this.

I am pasting the complete output (minus the apt-get update/install part) of the long troubleshooting command at

https://help.ubuntu.com/community/WirelessTroubleshootingProcedure

--- pasted content starts ---

  *-network
       description: Wireless interface
       product: Wireless-AC 9462
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       logical name: wlp0s20f3
       version: 00
       serial: c8:09:a8:e8:ea:68
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=5.3.0-24-generic firmware=48.4fa0041f.0 ip=192.168.1.179 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:16 memory:d1c10000-d1c13fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0.1
       bus info: pci@0000:26:00.1
       logical name: enp38s0f1
       version: 12
       serial: 80:fa:5b:76:ff:29
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
       resources: irq:16 ioport:4000(size=256) memory:d1a15000-d1a15fff memory:d1a10000-d1a13fff
0: hci0: Bluetooth
 Soft blocked: yes
 Hard blocked: no
1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
                    Channel:157
                    ESSID:"boomerang"
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"Fios-J4OXB"
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"L. On Hubbard"
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"Fios-JFRXP"
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"See My Vest"
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    ESSID:"I don't have wifi"
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"FiOS-XSDNB"
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"Fios-BD12Z"
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    ESSID:"Fios-BFUGE"
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"Fios-4VfcR"
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"therepublicofgilead"
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"DIRECT-52-HP OfficeJet 3830"
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"Untrusted Network"
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    ESSID:"FiOS-H21YS"
                    Channel:157
                    ESSID:"FiOS-BD9S8-5G"
                    Channel:149
                    ESSID:"DIRECT-7X-FireTV_f2f9"
                    Channel:149
                    ESSID:"L. On Hubbard"
                    Channel:149
                    ESSID:"See My Vest"
                    Channel:36
                    Frequency:5.18 GHz (Channel 36)
                    ESSID:"FiOS-XSDNB-5G"
                    Channel:36
                    Frequency:5.18 GHz (Channel 36)
                    ESSID:"Fios-JFRXP"
                    Channel:36
                    Frequency:5.18 GHz (Channel 36)
                    ESSID:"Fios-H9NPM"
                    Channel:36
                    Frequency:5.18 GHz (Channel 36)
                    ESSID:"Fios-J4OXB-5G"
                    Channel:36
                    Frequency:5.18 GHz (Channel 36)
                    ESSID:"Fios-4VfcR"
# ifupdown has been replaced by netplan(5) on this system. See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
# sudo apt install ifupdown
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.3 LTS"
00:14.3 Network controller [0280]: Intel Corporation Wireless-AC 9462 [8086:02f0]
 Subsystem: Intel Corporation Device [8086:0034]
 Kernel driver in use: iwlwifi
--
26:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12)
 Subsystem: CLEVO/KAPOK Computer RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1558:1403]
 Kernel driver in use: r8169
 Kernel modules: r8169
Bus 004 Device 002: ID 1058:25f3 Western Digital Technologies, Inc.
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 04f2:b649 Chicony Electronics Co., Ltd
Bus 001 Device 003: ID 8087:0aaa Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
STATE CONNECTIVITY WIFI-HW WIFI WWAN-HW WWAN
connected full enabled enabled enabled enabled
H/W path Device Class Description
==================================================================
                                        system Galago Pro
/0 bus Galago Pro
/0/0 memory 1MiB BIOS
/0/4 processor CPU [empty]
/0/4/6 memory 32KiB L1 cache
/0/4/7 memory 256KiB L2 cache
/0/4/8 memory 8MiB L3 cache
/0/5 memory 32KiB L1 cache
/0/1 memory
/0/1/0 memory 16GiB SODIMM DDR4 Synchronous 2667 MHz (0.4 ns)
/0/2 memory
/0/2/0 memory 16GiB SODIMM DDR4 Synchronous 2667 MHz (0.4 ns)
/0/c memory System Memory
/0/3 memory
/0/6 memory
/0/7 processor Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
/0/100 bridge Intel Corporation
/0/100/2 display UHD Graphics
/0/100/8 generic Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
/0/100/12 generic Comet Lake Thermal Subsytem
/0/100/14 bus Intel Corporation
/0/100/14/0 usb1 bus xHCI Host Controller
/0/100/14/0/7 multimedia Chicony USB2.0 Camera
/0/100/14/0/a communication Bluetooth wireless interface
/0/100/14/1 usb2 bus xHCI Host Controller
/0/100/14.2 memory RAM memory
/0/100/14.3 wlp0s20f3 network Wireless-AC 9462
/0/100/17 storage Comet Lake SATA AHCI Controller
/0/100/19 bus Intel Corporation
/0/100/19.2 communication Intel Corporation
/0/100/1c bridge Intel Corporation
/0/100/1c/0 bridge JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018]
/0/100/1c/0/0 bridge JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018]
/0/100/1c/0/0/0 generic JHL7540 Thunderbolt 3 NHI [Titan Ridge 2C 2018]
/0/100/1c/0/1 bridge JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018]
/0/100/1c/0/2 bridge JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018]
/0/100/1c/0/2/0 bus JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 2C 2018]
/0/100/1c/0/2/0/0 usb3 bus xHCI Host Controller
/0/100/1c/0/2/0/1 usb4 bus xHCI Host Controller
/0/100/1c/0/2/0/1/1 scsi3 storage My Passport 25F3
/0/100/1c/0/2/0/1/1/0.0.0 /dev/sdc disk 512GB My Passport 25F3
/0/100/1c/0/2/0/1/1/0.0.0/1 /dev/sdc1 volume 1023KiB BIOS Boot partition
/0/100/1c/0/2/0/1/1/0.0.0/2 /dev/sdc2 volume 4095MiB Linux swap volume
/0/100/1c/0/2/0/1/1/0.0.0/3 /dev/sdc3 volume 200GiB EXT4 volume
/0/100/1c/0/2/0/1/1/0.0.0/4 /dev/sdc4 volume 196GiB EXT4 volume
/0/100/1c/0/2/0/1/1/0.0.0/5 /dev/sdc5 volume 2190MiB Windows FAT volume
/0/100/1c/0/2/0/1/1/0.0.0/6 /dev/sdc6 volume 74GiB EXT4 volume
/0/100/1c/0/2/0/1/1/0.0.1 generic SES Device
/0/100/1d bridge Intel Corporation
/0/100/1d/0 generic RTL8411B PCI Express Card Reader
/0/100/1d/0.1 enp38s0f1 network RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
/0/100/1f bridge Intel Corporation
/0/100/1f.3 multimedia Intel Corporation
/0/100/1f.4 bus Intel Corporation
/0/100/1f.5 bus Comet Lake SPI (flash) Controller
/0/8 scsi0 storage
/0/8/0.0.0 /dev/sda disk 500GB WDC WDS500G2B0A
/0/8/0.0.0/1 /dev/sda1 volume 465GiB EXT4 volume
/0/9 scsi2 storage
/0/9/0.0.0 /dev/sdb disk 500GB WDC WDS500G2B0B
/0/9/0.0.0/1 volume 511MiB Windows FAT volume
/0/9/0.0.0/2 /dev/sdb2 volume 461GiB EXT4 volume
/0/9/0.0.0/3 /dev/sdb3 volume 4095MiB Linux swap volume
Linux system76-pc 5.3.0-24-generic #26~18.04.2-Ubuntu SMP Tue Nov 26 12:34:22 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
[ 0.006493] No NUMA configuration found
[ 0.189760] APIC: Switch to symmetric I/O mode setup
[ 0.192079] Switched APIC routing to cluster x2apic.
[ 0.218955] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[ 0.262027] pci 0000:02:00.0: [8086:15e7] type 01 class 0x060400
[ 0.262087] pci 0000:02:00.0: enabling Extended Tags
[ 0.262173] pci 0000:02:00.0: supports D1 D2
[ 0.262174] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.263107] pci 0000:02:00.0: PCI bridge to [bus 03]
[ 0.263114] pci 0000:02:00.0: bridge window [mem 0xd1800000-0xd18fffff]
[ 0.265882] usbcore: registered new interface driver usbfs
[ 0.265882] usbcore: registered new interface driver hub
[ 0.265882] usbcore: registered new device driver usb
[ 0.310811] clocksource: Switched to clocksource tsc-early
[ 0.318900] pnp: PnP ACPI: found 5 devices
[ 0.324200] pci 0000:02:00.0: PCI bridge to [bus 03]
[ 0.324204] pci 0000:02:00.0: bridge window [mem 0xd1800000-0xd18fffff]
[ 0.740100] Console: switching to colour frame buffer device 240x67
[ 0.740630] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input2
[ 0.740632] ACPI: Lid Switch [LID0]
[ 0.745203] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.03
[ 0.745204] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.745205] usb usb1: Product: xHCI Host Controller
[ 0.745205] usb usb1: Manufacturer: Linux 5.3.0-24-generic xhci-hcd
[ 0.745206] usb usb1: SerialNumber: 0000:00:14.0
[ 0.745259] hub 1-0:1.0: USB hub found
[ 0.745512] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.03
[ 0.745513] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.745514] usb usb2: Product: xHCI Host Controller
[ 0.745514] usb usb2: Manufacturer: Linux 5.3.0-24-generic xhci-hcd
[ 0.745515] usb usb2: SerialNumber: 0000:00:14.0
[ 0.745584] hub 2-0:1.0: USB hub found
[ 0.747396] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.03
[ 0.747397] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.747398] usb usb3: Product: xHCI Host Controller
[ 0.747398] usb usb3: Manufacturer: Linux 5.3.0-24-generic xhci-hcd
[ 0.747399] usb usb3: SerialNumber: 0000:25:00.0
[ 0.747481] hub 3-0:1.0: USB hub found
[ 0.747745] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.03
[ 0.747745] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.747746] usb usb4: Product: xHCI Host Controller
[ 0.747747] usb usb4: Manufacturer: Linux 5.3.0-24-generic xhci-hcd
[ 0.747747] usb usb4: SerialNumber: 0000:25:00.0
[ 0.747822] hub 4-0:1.0: USB hub found
[ 0.773923] RAS: Correctable Errors collector initialized.
[ 0.780805] ima: No TPM chip found, activating TPM-bypass!
[ 0.780811] No architecture policies found
[ 0.840550] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 0.901265] system76: Model System76 galp4 found
[ 0.901267] system76: No known WMI event notification GUID found
[ 0.902714] r8169 0000:26:00.1 eth0: RTL8411b, 80:fa:5b:76:ff:29, XID 5c8, IRQ 148
[ 0.902716] r8169 0000:26:00.1 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko]
[ 0.906638] r8169 0000:26:00.1 enp38s0f1: renamed from eth0
[ 1.081975] usb 1-7: new high-speed USB device number 2 using xhci_hcd
[ 1.260423] usb 4-1: new SuperSpeedPlus Gen 2 USB device number 2 using xhci_hcd
[ 1.278444] usb 4-1: New USB device found, idVendor=1058, idProduct=25f3, bcdDevice=10.06
[ 1.278445] usb 4-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[ 1.278446] usb 4-1: Product: My Passport 25F3
[ 1.278446] usb 4-1: Manufacturer: Western Digital
[ 1.278447] usb 4-1: SerialNumber: 313731313235343230353231
[ 1.281395] usb-storage 4-1:1.0: USB Mass Storage device detected
[ 1.281445] scsi host3: usb-storage 4-1:1.0
[ 1.281498] usbcore: registered new interface driver usb-storage
[ 1.282440] usbcore: registered new interface driver uas
[ 1.284019] system76: Model System76 galp4 found
[ 1.284021] system76: No known WMI event notification GUID found
[ 1.380113] usb 1-7: New USB device found, idVendor=04f2, idProduct=b649, bcdDevice=54.03
[ 1.380114] usb 1-7: New USB device strings: Mfr=2, Product=1, SerialNumber=0
[ 1.380115] usb 1-7: Product: Chicony USB2.0 Camera
[ 1.380116] usb 1-7: Manufacturer: Sonix Technology Co., Ltd.
[ 1.391127] usbcore: registered new interface driver system76-io
[ 1.621354] usb 1-10: new full-speed USB device number 3 using xhci_hcd
[ 1.757940] clocksource: Switched to clocksource tsc
[ 1.883707] usb 1-10: New USB device found, idVendor=8087, idProduct=0aaa, bcdDevice= 0.02
[ 1.883708] usb 1-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.345960] sd 3:0:0:0: [sdc] No Caching mode page found
[ 2.662173] EXT4-fs (sdb2): re-mounted. Opts: errors=remount-ro
[ 2.699114] lp: driver loaded but no devices found
[ 3.250008] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 3.258648] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 3.329929] Intel(R) Wireless WiFi driver for Linux
[ 3.389028] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: 43.2.23.17
[ 3.389209] iwlwifi 0000:00:14.3: loaded firmware version 48.4fa0041f.0 op_mode iwlmvm
[ 3.395021] usbcore: registered new interface driver btusb
[ 3.397132] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 3.413180] Bluetooth: hci0: Found device firmware: intel/ibt-19-0-1.sfi
[ 3.417793] system76: Model System76 galp4 found
[ 3.417795] system76: No known WMI event notification GUID found
[ 3.443103] fb0: switching to inteldrmfb from EFI VGA
[ 3.443207] Console: switching to colour dummy device 80x25
[ 3.491372] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560 160MHz, REV=0x354
[ 3.535758] Console: switching to colour frame buffer device 240x67
[ 3.635108] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 3.637685] iwlwifi 0000:00:14.3: base HW address: c8:09:a8:e8:ea:68
[ 3.693980] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[ 3.695717] iwlwifi 0000:00:14.3 wlp0s20f3: renamed from wlan0
[ 3.728742] uvcvideo: Found UVC 1.00 device Chicony USB2.0 Camera (04f2:b649)
[ 3.735542] input: Chicony USB2.0 Camera: Chicony as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/input/input14
[ 3.735575] usbcore: registered new interface driver uvcvideo
[ 3.818949] intel_rapl_common: Found RAPL domain package
[ 3.818959] intel_rapl_common: Found RAPL domain core
[ 3.818960] intel_rapl_common: Found RAPL domain uncore
[ 3.818960] intel_rapl_common: Found RAPL domain dram
[ 3.831287] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input15
[ 3.831330] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input16
[ 3.831367] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input17
[ 3.831403] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input18
[ 3.831438] input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input19
[ 3.831473] input: HDA Intel PCH HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input20
[ 3.831509] input: HDA Intel PCH HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input21
[ 4.944406] Bluetooth: hci0: Waiting for firmware download to complete
[ 4.945118] Bluetooth: hci0: Firmware loaded in 1513834 usecs
[ 4.958873] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-19-0-1.ddc
[ 8.362185] wlp0s20f3: authenticate with 48:5d:36:67:ee:3c
[ 8.364390] wlp0s20f3: send auth to 48:5d:36:67:ee:3c (try 1/3)
[ 8.386260] wlp0s20f3: authenticated
[ 8.389853] wlp0s20f3: associate with 48:5d:36:67:ee:3c (try 1/3)
[ 8.391227] wlp0s20f3: RX AssocResp from 48:5d:36:67:ee:3c (capab=0x1011 status=0 aid=2)
[ 8.394544] wlp0s20f3: associated
[ 8.431242] IPv6: ADDRCONF(NETDEV_CHANGE): wlp0s20f3: link becomes ready
[ 8.477739] wlp0s20f3: Limiting TX power to 30 (30 - 0) dBm as advertised by 48:5d:36:67:ee:3c
[40195.188441] wlp0s20f3: Connection to AP 48:5d:36:67:ee:3c lost
[40196.321206] wlp0s20f3: authenticate with 48:5d:36:67:ee:3c
[40196.324530] wlp0s20f3: send auth to 48:5d:36:67:ee:3c (try 1/3)
[40196.347167] wlp0s20f3: authenticated
[40196.347922] wlp0s20f3: associate with 48:5d:36:67:ee:3c (try 1/3)
[40196.349474] wlp0s20f3: RX AssocResp from 48:5d:36:67:ee:3c (capab=0x1011 status=0 aid=2)
[40196.351659] wlp0s20f3: associated
[40196.401450] wlp0s20f3: Limiting TX power to 30 (30 - 0) dBm as advertised by 48:5d:36:67:ee:3c
 Release Date: 10/30/2019
 Manufacturer: System76
 Product Name: Galago Pro
 Serial Number: 123456789
 Manufacturer: System76
 Product Name: Galago Pro
 Serial Number: 123456789
 Manufacturer: System76
 Serial Number: Not Specified
 Manufacturer: GenuineIntel
 Serial Number: Not Specified
 Manufacturer: Unknown (4589)
 Serial Number: 16161616
 Manufacturer: Unknown (4589)
 Serial Number: 16161616
wlp0s20f3 IEEE 802.11 ESSID:"boomerang"
          Mode:Managed Frequency:5.785 GHz Access Point: 48:5D:36:67:EE:3C
          Bit Rate=866.7 Mb/s Tx-Power=22 dBm
          Retry short limit:7 RTS thr:off Fragment thr:off
          Power Management:off
          Link Quality=70/70 Signal level=-35 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:367 Missed beacon:0

/etc/modprobe.d/alsa-base.conf:install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }
/etc/modprobe.d/blacklist-ath_pci.conf:# which ath5k cannot recover. To prevent this condition, stop
/etc/modprobe.d/blacklist-ath_pci.conf:blacklist ath_pci
/etc/modprobe.d/blacklist.conf:blacklist eth1394
/etc/modprobe.d/blacklist.conf:# replaced by p54pci
/etc/modprobe.d/blacklist.conf:blacklist prism54
/etc/modprobe.d/blacklist.conf:# replaced by b43 and ssb.
/etc/modprobe.d/blacklist.conf:blacklist bcm43xx
/etc/modprobe.d/blacklist-oss.conf:blacklist uart6850
/etc/modprobe.d/iwlwifi.conf:# /etc/modprobe.d/iwlwifi.conf
/etc/modprobe.d/iwlwifi.conf:# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
/etc/modprobe.d/iwlwifi.conf:# microcode file installed on the system. When removing iwlwifi, first
/etc/modprobe.d/iwlwifi.conf:# remove the iwl?vm module and then iwlwifi.
/etc/modprobe.d/iwlwifi.conf:remove iwlwifi \
/etc/modprobe.d/iwlwifi.conf:(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
/etc/modprobe.d/iwlwifi.conf:&& /sbin/modprobe -r mac80211
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
15: PCI 14.3: 0282 WLAN controller
  [Created at pci.378]
  Unique ID: Dhtl.ANm6tGwU8c7
  SysFS ID: /devices/pci0000:00/0000:00:14.3
  SysFS BusID: 0000:00:14.3
  Hardware Class: network
  Model: "Intel WLAN controller"
  Vendor: pci 0x8086 "Intel Corporation"
  Device: pci 0x02f0
  SubVendor: pci 0x8086 "Intel Corporation"
  SubDevice: pci 0x0034
  Driver: "iwlwifi"
  Driver Modules: "iwlwifi"
  Device File: wlp0s20f3
  Features: WLAN
  Memory Range: 0xd1c10000-0xd1c13fff (rw,non-prefetchable)
  IRQ: 16 (no events)
  HW Address: c8:09:a8:e8:ea:68
  Permanent HW Address: c8:09:a8:e8:ea:68
  Link detected: yes
  WLAN channels: 1 2 3 4 5 6 7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140
  WLAN frequencies: 2.412 2.417 2.422 2.427 2.432 2.437 2.442 2.447 2.452 2.457 2.462 2.467 2.472 5.18 5.2 5.22 5.24 5.26 5.28 5.3 5.32 5.5 5.52 5.54 5.56 5.58 5.6 5.62 5.64 5.66 5.68 5.7
  WLAN encryption modes: WEP40 WEP104 TKIP CCMP
  WLAN authentication modes: open sharedkey wpa-psk wpa-eap
  Module Alias: "pci:v00008086d000002F0sv00008086sd00000034bc02sc80i00"
  Driver Info #0:
    Driver Status: iwlwifi is active
    Driver Activation Cmd: "modprobe iwlwifi"
  Config Status: cfg=new, avail=yes, need=no, active=unknown

23: PCI 2600.1: 0200 Ethernet controller
  [Created at pci.378]
  Unique ID: YzkE.H31vlPTHa+9
  Parent ID: 1GTX._SzPHal3+_7
  SysFS ID: /devices/pci0000:00/0000:00:1d.0/0000:26:00.1
  SysFS BusID: 0000:26:00.1
  Hardware Class: network
  Model: "Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller"
  Vendor: pci 0x10ec "Realtek Semiconductor Co., Ltd."
  Device: pci 0x8168 "RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller"
  SubVendor: pci 0x1558 "CLEVO/KAPOK Computer"
  SubDevice: pci 0x1403
  Revision: 0x12
  Driver: "r8169"
  Driver Modules: "r8169"
  Device File: enp38s0f1
  I/O Ports: 0x4000-0x4fff (rw)
  Memory Range: 0xd1a15000-0xd1a15fff (rw,non-prefetchable)
  Memory Range: 0xd1a10000-0xd1a13fff (rw,non-prefetchable)
  IRQ: 16 (no events)
  HW Address: 80:fa:5b:76:ff:29
  Permanent HW Address: 80:fa:5b:76:ff:29
  Link detected: yes
  Module Alias: "pci:v000010ECd00008168sv00001558sd00001403bc02sc00i00"
  Driver Info #0:
    Driver Status: r8169 is active
    Driver Activation Cmd: "modprobe r8169"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #25 (PCI bridge)
root 1014 0.0 0.0 177636 17236 ? Ssl Dec11 0:00 /usr/bin/python3 /usr/bin/networkd-dispatcher --run-startup-triggers
root 1076 0.0 0.0 45632 8000 ? Ss Dec11 0:00 /sbin/wpa_supplicant -u -s -O /run/wpa_supplicant
root 1080 0.0 0.0 507232 19404 ? Ssl Dec11 0:10 /usr/sbin/NetworkManager --no-daemon
chirvas+ 14566 0.0 0.0 21532 1104 pts/11 S+ 06:32 0:00 grep --color=auto -E wpa|icd|etwork
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlp0s20f3
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 wlp0s20f3
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "systemd-resolve --status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0
total 365224
18087937 drwxr-xr-x 4 root root 4096 Dec 10 21:03 .
       2 drwxr-xr-x 23 root root 4096 Dec 9 06:03 ..
18088221 -rw-r--r-- 1 root root 224496 Nov 14 06:10 config-5.0.0-37-generic
18088231 -rw-r--r-- 1 root root 235864 Nov 13 10:51 config-5.3.0-22-generic
18088230 -rw-r--r-- 1 root root 235834 Nov 21 09:36 config-5.3.0-23-generic
18088236 -rw-r--r-- 1 root root 235892 Nov 26 06:41 config-5.3.0-24-generic
 1443719 -rw-rw-r-- 1 chirvasitua chirvasitua 238440 Dec 5 14:31 config-5.4.0-s76+
 3933572 -rw------- 1 548358 1112 238686 Dec 10 21:00 config-5.5.0-rc1+
       1 drwx------ 4 root root 4096 Dec 31 1969 efi
18087945 drwxr-xr-x 5 root root 4096 Dec 11 14:45 grub
18088219 -rw-r--r-- 1 root root 41456271 Dec 5 14:33 initrd.img-
18088227 -rw-r--r-- 1 root root 41562134 Dec 3 17:55 initrd.img-5.0.0-37-generic
18087940 -rw-r--r-- 1 root root 41456551 Dec 3 20:25 initrd.img-5.3.0-22-generic
18088239 -rw-r--r-- 1 root root 42124356 Dec 8 18:30 initrd.img-5.3.0-23-generic
18088240 -rw-r--r-- 1 root root 42127970 Dec 8 18:30 initrd.img-5.3.0-24-generic
18088222 -rw-r--r-- 1 root root 40413457 Dec 5 14:35 initrd.img-5.4.0-s76+
18087941 -rw-r--r-- 1 root root 40499777 Dec 10 21:03 initrd.img-5.5.0-rc1+
18088224 -rw-r--r-- 1 root root 182704 Jan 28 2016 memtest86+.bin
18088225 -rw-r--r-- 1 root root 184380 Jan 28 2016 memtest86+.elf
18088226 -rw-r--r-- 1 root root 184840 Jan 28 2016 memtest86+_multiboot.bin
18087939 -rw------- 1 root root 4302188 Nov 14 06:10 System.map-5.0.0-37-generic
18087948 -rw------- 1 root root 4486172 Nov 13 10:51 System.map-5.3.0-22-generic
18088228 -rw------- 1 root root 4486172 Nov 21 09:36 System.map-5.3.0-23-generic
18088235 -rw------- 1 root root 4486967 Nov 26 06:41 System.map-5.3.0-24-generic
 1443717 -rw-rw-r-- 1 chirvasitua chirvasitua 4539627 Dec 5 14:31 System.map-5.4.0-s76+
 3936249 -rw------- 1 548358 1112 5095650 Dec 10 21:00 System.map-5.5.0-rc1+
18088223 -rw------- 1 root root 8785656 Nov 14 05:29 vmlinuz-5.0.0-37-generic
18088232 -rw------- 1 root root 9144704 Nov 13 10:51 vmlinuz-5.3.0-22-generic
18088234 -rw------- 1 root root 9146616 Nov 21 17:04 vmlinuz-5.3.0-23-generic
18088237 -rw------- 1 root root 9146616 Nov 26 06:42 vmlinuz-5.3.0-24-generic
 1443718 -rw-rw-r-- 1 chirvasitua chirvasitua 9300352 Dec 5 14:31 vmlinuz-5.4.0-s76+
 3936250 -rw------- 1 548358 1112 9378176 Dec 10 21:00 vmlinuz-5.5.0-rc1+
Your Hardware Enablement Stack (HWE) is supported until April 2023.
Support status summary of 'system76-pc':

You have 1815 packages (89.8%) supported until April 2023 (Canonical - 5y)
You have 118 packages (5.8%) supported until April 2021 (Community - 3y)
You have 3 packages (0.1%) supported until April 2021 (Canonical - 3y)

You have 6 packages (0.3%) that can not/no-longer be downloaded
You have 80 packages (4.0%) that are unsupported

Run with --show-unsupported, --show-supported or --show-all to see more details
Downloaded daily snapshot dated 2019-12-11 03:15:01
Done.
Module Size Used by
rfcomm 81920 16
ccm 20480 9
bnep 24576 2
nls_iso8859_1 16384 1
sof_pci_dev 20480 0
snd_sof_intel_hda_common 69632 1 sof_pci_dev
snd_sof_intel_hda 20480 1 snd_sof_intel_hda_common
snd_sof_intel_byt 24576 1 sof_pci_dev
snd_sof_intel_ipc 20480 1 snd_sof_intel_byt
snd_sof 98304 4 snd_sof_intel_hda_common,snd_sof_intel_byt,snd_sof_intel_ipc,sof_pci_dev
snd_sof_xtensa_dsp 16384 1 sof_pci_dev
snd_soc_skl 106496 0
snd_soc_hdac_hda 24576 2 snd_sof_intel_hda_common,snd_soc_skl
snd_hda_ext_core 28672 4 snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_soc_skl,snd_sof_intel_hda
snd_soc_skl_ipc 61440 1 snd_soc_skl
snd_hda_codec_hdmi 57344 1
snd_soc_sst_ipc 20480 1 snd_soc_skl_ipc
snd_soc_sst_dsp 36864 1 snd_soc_skl_ipc
snd_soc_acpi_intel_match 28672 3 snd_sof_intel_hda_common,sof_pci_dev,snd_soc_skl
intel_rapl_msr 20480 0
snd_soc_acpi 16384 3 snd_soc_acpi_intel_match,sof_pci_dev,snd_soc_skl
intel_rapl_common 24576 1 intel_rapl_msr
snd_soc_core 237568 4 snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_soc_skl
x86_pkg_temp_thermal 20480 0
intel_powerclamp 20480 0
snd_compress 24576 1 snd_soc_core
ac97_bus 16384 1 snd_soc_core
coretemp 20480 0
snd_pcm_dmaengine 16384 1 snd_soc_core
kvm_intel 241664 0
snd_hda_codec_realtek 118784 1
kvm 651264 1 kvm_intel
snd_hda_codec_generic 81920 1 snd_hda_codec_realtek
ledtrig_audio 16384 2 snd_hda_codec_generic,snd_hda_codec_realtek
irqbypass 16384 1 kvm
uvcvideo 94208 0
snd_hda_intel 49152 6
crct10dif_pclmul 16384 1
videobuf2_vmalloc 20480 1 uvcvideo
8250_dw 20480 0
snd_hda_codec 135168 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda
crc32_pclmul 16384 0
iwlmvm 397312 0
videobuf2_memops 20480 1 videobuf2_vmalloc
snd_hda_core 90112 10 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_soc_skl,snd_sof_intel_hda
ghash_clmulni_intel 16384 0
videobuf2_v4l2 24576 1 uvcvideo
i915 1937408 25
snd_hwdep 20480 1 snd_hda_codec
aesni_intel 372736 6
mac80211 847872 1 iwlmvm
videobuf2_common 53248 2 videobuf2_v4l2,uvcvideo
snd_pcm 102400 10 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_sof,snd_sof_intel_hda_common,snd_soc_core,snd_soc_skl,snd_hda_core,snd_pcm_dmaengine
videodev 208896 3 videobuf2_v4l2,uvcvideo,videobuf2_common
aes_x86_64 20480 1 aesni_intel
snd_seq_midi 20480 0
crypto_simd 16384 1 aesni_intel
mc 53248 4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
snd_seq_midi_event 16384 1 snd_seq_midi
libarc4 16384 1 mac80211
cryptd 24576 2 crypto_simd,ghash_clmulni_intel
btusb 57344 0
video 49152 1 i915
ses 20480 0
snd_rawmidi 36864 1 snd_seq_midi
glue_helper 16384 1 aesni_intel
btrtl 20480 1 btusb
drm_kms_helper 180224 1 i915
enclosure 16384 1 ses
btbcm 16384 1 btusb
intel_cstate 20480 0
iwlwifi 348160 1 iwlmvm
scsi_transport_sas 40960 1 ses
drm 487424 15 drm_kms_helper,i915
snd_seq 69632 2 snd_seq_midi,snd_seq_midi_event
btintel 24576 1 btusb
intel_rapl_perf 20480 0
bluetooth 573440 43 btrtl,btintel,btbcm,bnep,btusb,rfcomm
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
i2c_algo_bit 16384 1 i915
rtsx_pci_ms 24576 0
snd_timer 36864 2 snd_seq,snd_pcm
fb_sys_fops 16384 1 drm_kms_helper
snd 86016 25 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_rawmidi
syscopyarea 16384 1 drm_kms_helper
joydev 28672 0
input_leds 16384 0
ecdh_generic 16384 1 bluetooth
sysfillrect 16384 1 drm_kms_helper
memstick 20480 1 rtsx_pci_ms
ecc 32768 1 ecdh_generic
sysimgblt 16384 1 drm_kms_helper
soundcore 16384 1 snd
cfg80211 708608 3 iwlmvm,iwlwifi,mac80211
serio_raw 20480 0
intel_lpss_pci 20480 0
intel_hid 20480 0
intel_lpss 16384 1 intel_lpss_pci
mac_hid 16384 0
sparse_keymap 16384 1 intel_hid
sch_fq_codel 20480 2
parport_pc 36864 0
ppdev 24576 0
lp 20480 0
parport 53248 3 parport_pc,lp,ppdev
ip_tables 32768 0
x_tables 40960 1 ip_tables
autofs4 45056 2
system76_io 16384 0
uas 24576 0
usb_storage 73728 4 uas
rtsx_pci_sdmmc 28672 0
wmi 32768 0
psmouse 151552 0
r8169 81920 0
thunderbolt 167936 0
rtsx_pci 69632 2 rtsx_pci_sdmmc,rtsx_pci_ms
realtek 20480 1
ahci 40960 3
libahci 32768 1 ahci
pinctrl_cannonlake 36864 0
pinctrl_intel 28672 1 pinctrl_cannonlake
system76_acpi 16384 0

--- paste ends ---

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1856178/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[A.C. (gileadian)]

Turning off power management did not do much at all: I am again seeing clusters of disconnects and reconnects in 'dmesg'.

---

Separately:

Even without disconnects, when connected to this particular SSID 'iwconfig' reports a gradually-increasing "Invalid misc" count (i.e. dropped packets).

I don't see that with other 5GHz connections: I am on one now for instance, namely my university's eduroam, and 'iwconfig' reports no "Invalid misc".

Any thoughts on what that might be about? Is it interference of some sort? Perhaps something I can mitigate by changing my home router's settings?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.