Results from your third suggestion (unfortunately no success): $ sudo add-apt-repository ppa:canonical-hwe-team/backport-iwlwifi $ sudo apt install backport-iwlwifi-dkms Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: backport-iwlwifi-dkms 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 1.551 kB of archives. After this operation, 9.942 kB of additional disk space will be used. Get:1 http://ppa.launchpad.net/canonical-hwe-team/backport-iwlwifi/ubuntu eoan/main amd64 backport-iwlwifi-dkms all 8042-0ubuntu1 [1.551 kB] Fetched 1.551 kB in 2s (849 kB/s) Selecting previously unselected package backport-iwlwifi-dkms. (Reading database ... 320149 files and directories currently installed.) Preparing to unpack .../backport-iwlwifi-dkms_8042-0ubuntu1_all.deb ... Unpacking backport-iwlwifi-dkms (8042-0ubuntu1) ... Setting up backport-iwlwifi-dkms (8042-0ubuntu1) ... Loading new backport-iwlwifi-8042 DKMS files... Building for 5.3.0-19-generic Building initial module for 5.3.0-19-generic Done. compat.ko: Running module version sanity check. modinfo: ERROR: missing module or filename. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.3.0-19-generic/updates/dkms/ iwlwifi.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.3.0-19-generic/updates/dkms/ iwlxvt.ko: Running module version sanity check. modinfo: ERROR: missing module or filename. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.3.0-19-generic/updates/dkms/ iwlmvm.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.3.0-19-generic/updates/dkms/ mac80211.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.3.0-19-generic/updates/dkms/ cfg80211.ko: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/5.3.0-19-generic/updates/dkms/ depmod... DKMS: install completed. $ uname -a Linux whakaari 5.3.0-19-generic #20-Ubuntu SMP Fri Oct 18 09:04:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Then I rebooted and tried to connect to the WIFI $ dmesg | grep "iwlwifi\|wlp3s0" [ 4.247626] Loading modules backported from iwlwifi [ 4.247627] iwlwifi-stack-public:master:8042:654c426c [ 4.362032] iwlwifi 0000:03:00.0: Direct firmware load for iwl-dbg-cfg.ini failed with error -2 [ 4.367098] iwlwifi 0000:03:00.0: Found debug destination: EXTERNAL_DRAM [ 4.367108] iwlwifi 0000:03:00.0: Found debug configuration: 0 [ 4.367369] iwlwifi 0000:03:00.0: loaded firmware version 29.62a39462.0 op_mode iwlmvm [ 4.389809] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210 [ 4.403033] iwlwifi 0000:03:00.0: Applying debug destination EXTERNAL_DRAM [ 4.403770] iwlwifi 0000:03:00.0: Allocated 0x00400000 bytes for firmware monitor. [ 4.412431] iwlwifi 0000:03:00.0: base HW address: 5c:e0:c5:63:e2:a5 [ 4.778388] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0 [ 6.808565] iwlwifi 0000:03:00.0: Applying debug destination EXTERNAL_DRAM [ 6.886587] iwlwifi 0000:03:00.0: Applying debug destination EXTERNAL_DRAM [ 6.889305] iwlwifi 0000:03:00.0: FW already configured (0) - re-configuring [ 52.385983] wlp3s0: authenticate with 9c:4f:cf:a1:91:62 [ 52.391168] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 1/3) [ 52.507214] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 2/3) [ 52.612962] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 3/3) [ 52.622972] wlp3s0: authenticated [ 52.627184] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 1/3) [ 52.731156] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 2/3) [ 52.835165] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 3/3) [ 52.939161] wlp3s0: association with 9c:4f:cf:a1:91:62 timed out [ 53.982692] wlp3s0: authenticate with 9c:4f:cf:a1:91:62 [ 53.987699] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 1/3) [ 54.091208] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 2/3) [ 54.101544] wlp3s0: authenticated [ 54.103138] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 1/3) [ 54.207274] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 2/3) [ 54.311270] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 3/3) [ 54.415246] wlp3s0: association with 9c:4f:cf:a1:91:62 timed out [ 55.861407] wlp3s0: authenticate with 9c:4f:cf:a1:91:62 [ 55.866987] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 1/3) [ 55.975216] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 2/3) [ 55.986647] wlp3s0: authenticated [ 55.991142] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 1/3) [ 56.095181] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 2/3) [ 56.199145] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 3/3) [ 56.303227] wlp3s0: association with 9c:4f:cf:a1:91:62 timed out [ 60.426925] wlp3s0: authenticate with 9c:4f:cf:a1:91:62 [ 60.432179] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 1/3) [ 60.539148] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 2/3) [ 60.644810] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 3/3) [ 60.654977] wlp3s0: authenticated [ 60.659186] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 1/3) [ 60.763221] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 2/3) [ 60.867217] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 3/3) [ 60.971235] wlp3s0: association with 9c:4f:cf:a1:91:62 timed out [ 70.913268] wlp3s0: authenticate with 9c:4f:cf:a1:91:62 [ 70.918279] wlp3s0: send auth to 9c:4f:cf:a1:91:62 (try 1/3) [ 70.929492] wlp3s0: authenticated [ 70.931136] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 1/3) [ 71.035162] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 2/3) [ 71.139178] wlp3s0: associate with 9c:4f:cf:a1:91:62 (try 3/3) [ 71.243246] wlp3s0: association with 9c:4f:cf:a1:91:62 timed out Same behavior. In addition the D-Link DWA-140 WIFI stick I use now did not work as well. (after uninstalling backport-iwlwifi-dkms it's fine again) [ 251.403242] usb 2-2: new high-speed USB device number 8 using xhci_hcd [ 251.567276] usb 2-2: New USB device found, idVendor=2001, idProduct=3c15, bcdDevice= 1.01 [ 251.567281] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 251.567285] usb 2-2: Product: 11n Adapter [ 251.567288] usb 2-2: Manufacturer: D-Link [ 251.567291] usb 2-2: SerialNumber: 1.0 [ 251.723542] usb 2-2: reset high-speed USB device number 8 using xhci_hcd [ 251.883073] (null): rt2x00_set_rt: Info - RT chipset 5392, rev 0223 detected [ 251.894253] (null): rt2x00_set_rf: Info - RF chipset 5372 detected [ 251.894381] ------------[ cut here ]------------ [ 251.894470] WARNING: CPU: 3 PID: 2036 at /var/lib/dkms/backport-iwlwifi/8042/build/net/wireless/core.c:866 wiphy_register.cold+0xcc/0x40b [cfg80211] [ 251.894472] Modules linked in: rt2800usb(+) rt2x00usb rt2800lib rt2x00lib rfcomm cmac bnep binfmt_misc joydev intel_rapl_msr mei_hdcp snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep intel_rapl_common x86_pkg_temp_thermal snd_pcm intel_powerclamp coretemp snd_seq_midi snd_seq_midi_event cdc_mbim cdc_wdm cdc_ncm rmi_smbus snd_rawmidi rmi_core uvcvideo videobuf2_vmalloc usbnet videobuf2_memops btusb kvm videobuf2_v4l2 cdc_acm input_leds mii iwlmvm(OE) videobuf2_common mac80211(OE) btrtl snd_seq btbcm btintel irqbypass intel_pch_thermal intel_cstate intel_rapl_perf videodev serio_raw thinkpad_acpi iwlwifi(OE) rtsx_pci_ms bluetooth wmi_bmof cfg80211(OE) nvram memstick ecdh_generic mc compat(OE) snd_seq_device snd_timer ecc mei_me ledtrig_audio snd mei soundcore mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915 [ 251.894528] aes_x86_64 crypto_simd rtsx_pci_sdmmc i2c_algo_bit drm_kms_helper cryptd syscopyarea glue_helper sysfillrect psmouse e1000e i2c_i801 ahci sysimgblt fb_sys_fops rtsx_pci libahci lpc_ich drm wmi video [ 251.894548] CPU: 3 PID: 2036 Comm: systemd-udevd Tainted: G OE 5.3.0-19-generic #20-Ubuntu [ 251.894550] Hardware name: LENOVO 20BX000TGE/20BX000TGE, BIOS JBET66WW (1.30 ) 09/13/2017 [ 251.894584] RIP: 0010:wiphy_register.cold+0xcc/0x40b [cfg80211] [ 251.894589] Code: ff e9 61 a6 fa ff 48 c7 c7 58 df 95 c0 e8 f5 32 3b de 0f 0b b8 ea ff ff ff e9 49 a6 fa ff 48 c7 c7 58 df 95 c0 e8 dd 32 3b de <0f> 0b b8 ea ff ff ff e9 31 a6 fa ff 48 c7 c7 58 df 95 c0 e8 c5 32 [ 251.894591] RSP: 0018:ffffb2a6814d78d0 EFLAGS: 00010246 [ 251.894594] RAX: 0000000000000024 RBX: 0000000000000040 RCX: 0000000000000006 [ 251.894596] RDX: 0000000000000000 RSI: 0000000000000082 RDI: ffff9a9d61ed7440 [ 251.894597] RBP: ffffb2a6814d7950 R08: 00000000000003a5 R09: 0000000000000004 [ 251.894599] R10: 0000000000000000 R11: 0000000000000001 R12: ffff9a9d54610300 [ 251.894601] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 251.894604] FS: 00007fd0f521e880(0000) GS:ffff9a9d61ec0000(0000) knlGS:0000000000000000 [ 251.894606] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 251.894608] CR2: 0000555ce921c6f0 CR3: 0000000312d18006 CR4: 00000000003606e0 [ 251.894610] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 251.894612] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 251.894613] Call Trace: [ 251.894623] ? __kmalloc+0x180/0x270 [ 251.894657] ieee80211_register_hw+0x4a6/0xce0 [mac80211] [ 251.894666] rt2x00lib_probe_hw+0x397/0x3f0 [rt2x00lib] [ 251.894673] rt2x00lib_probe_dev+0x2e4/0x390 [rt2x00lib] [ 251.894679] rt2x00usb_probe+0x1cc/0x230 [rt2x00usb] [ 251.894689] rt2800usb_probe+0x15/0x20 [rt2800usb] [ 251.894696] usb_probe_interface+0xed/0x290 [ 251.894702] really_probe+0xfb/0x3a0 [ 251.894707] driver_probe_device+0x5f/0xe0 [ 251.894712] device_driver_attach+0x5d/0x70 [ 251.894716] __driver_attach+0x8f/0x150 [ 251.894721] ? device_driver_attach+0x70/0x70 [ 251.894725] bus_for_each_dev+0x7e/0xc0 [ 251.894729] driver_attach+0x1e/0x20 [ 251.894733] bus_add_driver+0x14f/0x1f0 [ 251.894738] driver_register+0x74/0xc0 [ 251.894743] usb_register_driver+0x7b/0x120 [ 251.894746] ? 0xffffffffc101b000 [ 251.894753] rt2800usb_driver_init+0x23/0x1000 [rt2800usb] [ 251.894759] do_one_initcall+0x4a/0x1fa [ 251.894762] ? kfree+0x1ef/0x210 [ 251.894767] ? _cond_resched+0x19/0x30 [ 251.894771] ? kmem_cache_alloc_trace+0x163/0x230 [ 251.894776] do_init_module+0x62/0x250 [ 251.894781] load_module+0x10d4/0x1220 [ 251.894789] __do_sys_finit_module+0xbe/0x120 [ 251.894793] ? __do_sys_finit_module+0xbe/0x120 [ 251.894799] __x64_sys_finit_module+0x1a/0x20 [ 251.894803] do_syscall_64+0x5a/0x130 [ 251.894809] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 251.894811] RIP: 0033:0x7fd0f579194d [ 251.894816] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 13 e5 0c 00 f7 d8 64 89 01 48 [ 251.894818] RSP: 002b:00007ffd333440c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 251.894821] RAX: ffffffffffffffda RBX: 0000555ce9218080 RCX: 00007fd0f579194d [ 251.894822] RDX: 0000000000000000 RSI: 00007fd0f566ecad RDI: 0000000000000010 [ 251.894824] RBP: 00007fd0f566ecad R08: 0000000000000000 R09: 0000555ce9218080 [ 251.894826] R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000 [ 251.894827] R13: 0000555ce9204d10 R14: 0000000000020000 R15: 0000555ce9218080 [ 251.894832] ---[ end trace 2a02ae7d6c6947c4 ]--- [ 251.894836] (null): rt2x00lib_probe_dev: Error - Failed to initialize hw [ 251.894889] rt2800usb: probe of 2-2:1.0 failed with error -22 [ 251.894962] usbcore: registered new interface driver rt2800usb