I'm heading for bed shortly but will watch the email for another 5 minutes.
-- John

On Mon, Dec 28, 2020 at 11:40 PM John Dunlap <email address hidden>
wrote:

> It's pretty jerky.  Then after a number of cycles of blinking screen on
> the laptop and the dock seemingly being restarted (the Ethernet kept going
> off and on) the external screen came to life and now the system seems to be
> operating normally.  I did fiddle with the "Display" GUI a bit before it
> stopped being jerky.  Attached is the dmesg. -- John
>
> On Mon, Dec 28, 2020 at 11:18 PM John Dunlap <email address hidden>
> wrote:
>
>> I suppose these .deb files are the ones you'd like me to try:
>>
>> -rw-rw-r-- 1 dunlap dunlap 11476820 2020-12-27 18:19
>> linux-headers-5.10.0-051000drmtip20201228_5.10.0-051000drmtip20201228.202012280203_all.deb
>> -rw-rw-r-- 1 dunlap dunlap  1248336 2020-12-27 18:22
>> linux-headers-5.10.0-051000drmtip20201228-generic_5.10.0-051000drmtip20201228.202012280203_amd64.deb
>> -rw-rw-r-- 1 dunlap dunlap 10981324 2020-12-27 18:21
>> linux-image-unsigned-5.10.0-051000drmtip20201228-generic_5.10.0-051000drmtip20201228.202012280203_amd64.deb
>> -rw-rw-r-- 1 dunlap dunlap 56164620 2020-12-27 18:21
>> linux-modules-5.10.0-051000drmtip20201228-generic_5.10.0-051000drmtip20201228.202012280203_amd64.deb
>>
>> I'll install them and try drm.debug=0x11e log_buf_len=16M in grub
>>
>> On Mon, Dec 28, 2020 at 10:55 PM koba <email address hidden> wrote:
>>
>>> @John, if you're free, Would you please help to try drm-tip?
>>> You cound just download the files with "generic" and
>>> linux_header_***_all.deb
>>> https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/2020-12-28/
>>>
>>> And enable drm.debug=0x11e log_buf_len=16M in grub.
>>>
>>> If the issue still exist, please upload the dmesg
>>>
>>> --
>>> You received this bug notification because you are subscribed to the bug
>>> report.
>>> https://bugs.launchpad.net/bugs/1899882
>>>
>>> Title:
>>>   hdmi monitor on
>>>
>>> Status in linux package in Ubuntu:
>>>   Fix Committed
>>>
>>> Bug description:
>>>   XPS 13 9300 -- 50H3P53 -- Dell laptop
>>>   WD19TB ------- 4BWNW43 -- Dell Thunderbolt dock
>>>   S2319HS ------ B4TYZ13 -- Dell 23" external monitor
>>>
>>>   External monitor remains black when waking system after suspending.
>>>   Works OK when log out then log in or when reboot.
>>>   Using HDMI cable from dock to monitor.
>>>
>>>   From /var/log/syslog:
>>>
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746520] ------------[ cut here
>>> ]------------
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746524] WARN_ON(is_mst && (port ==
>>> PORT_A || port == PORT_E))
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746674] WARNING: CPU: 6 PID: 1221
>>> at drivers/gpu/drm/i915/display/intel_ddi.c:3179
>>> intel_ddi_pre_enable_dp.isra.0+0x20f/0x430 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746676] Modules linked in: ccm
>>> usblp ftdi_sio usbserial snd_usb_audio snd_usbmidi_lib rfcomm
>>> typec_displayport cdc_ether usbnet r8152 mii cmac algif_hash algif_skcipher
>>> af_al
>>>   g bnep btusb btrtl btbcm btintel uvcvideo videobuf2_vmalloc
>>> videobuf2_memops bluetooth videobuf2_v4l2 videobuf2_common videodev mc
>>> ecdh_generic ecc nls_iso8859_1 snd_sof_pci snd_sof_intel_hda_common
>>> snd_soc_hd
>>>   ac_hda snd_hda_codec_hdmi snd_sof_intel_hda snd_sof_intel_byt
>>> snd_sof_intel_ipc snd_sof snd_sof_xtensa_dsp snd_hda_ext_core
>>> snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core snd_compress
>>> snd_hda_codec_realtek
>>>    ac97_bus snd_pcm_dmaengine snd_hda_codec_generic snd_hda_intel
>>> mei_hdcp snd_intel_dspcfg dell_laptop snd_hda_codec joydev ledtrig_audio
>>> intel_rapl_msr snd_hda_core snd_hwdep x86_pkg_temp_thermal intel_powercl
>>>   amp snd_pcm coretemp kvm_intel kvm snd_seq_midi snd_seq_midi_event
>>> snd_rawmidi crct10dif_pclmul ghash_clmulni_intel dell_wmi snd_seq
>>> aesni_intel dell_smbios crypto_simd dcdbas cryptd glue_helper rapl
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746719]  intel_cstate iwlmvm
>>> input_leds serio_raw mac80211 snd_seq_device intel_wmi_thunderbolt wmi_bmof
>>> dell_wmi_descriptor snd_timer libarc4 snd hid_sensor_als hid_sensor_t
>>>   rigger industrialio_triggered_buffer iwlwifi kfifo_buf
>>> hid_sensor_iio_common rtsx_pci_ms 8250_dw memstick soundcore industrialio
>>> ucsi_acpi processor_thermal_device intel_rapl_common mei_me typec_ucsi
>>> cros_ec_i
>>>   shtp hid_multitouch mei cfg80211 cros_ec intel_soc_dts_iosf typec
>>> int3403_thermal mac_hid int340x_thermal_zone int3400_thermal intel_hid
>>> acpi_thermal_rel sparse_keymap acpi_pad acpi_tad sch_fq_codel parport_pc
>>>    ppdev lp parport ip_tables x_tables autofs4 btrfs zstd_compress
>>> usbhid raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor
>>> async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_sensor_
>>>   hub hid_generic intel_ishtp_loader intel_ishtp_hid rtsx_pci_sdmmc i915
>>> crc32_pclmul rtsx_pci psmouse nvme i2c_algo_bit drm_kms_helper
>>> intel_lpss_pci i2c_i801 intel_lpss nvme_core syscopyarea idma64
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746764]  sysfillrect virt_dma
>>> sysimgblt fb_sys_fops intel_ish_ipc thunderbolt drm intel_ishtp wmi i2c_hid
>>> hid video pinctrl_icelake pinctrl_intel
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746778] CPU: 6 PID: 1221 Comm: Xorg
>>> Tainted: G        W         5.4.0-48-generic #52-Ubuntu
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746780] Hardware name: Dell Inc.
>>> XPS 13 9300/0RMFN5, BIOS 1.2.0 08/13/2020
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746843] RIP:
>>> 0010:intel_ddi_pre_enable_dp.isra.0+0x20f/0x430 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746847] Code: ff ff 83 f8 0a bf 00
>>> 00 00 00 49 0f 44 fc 48 89 7d c0 e9 4b fe ff ff 48 c7 c6 e0 0a 76 c0 48 c7
>>> c7 43 79 77 c0 e8 0c c5 bd db <0f> 0b e9 ae fe ff ff 41 8b 54 24 70 8b 75
>>> a8 4c 89 e7 e8 8a c7 ff
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746849] RSP: 0018:ffffb3bf01253850
>>> EFLAGS: 00010282
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746852] RAX: 0000000000000000 RBX:
>>> ffff9f1eebeca000 RCX: 0000000000000000
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746854] RDX: 0000000000000035 RSI:
>>> ffffffff9dd955d5 RDI: 0000000000000246
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746855] RBP: ffffb3bf012538a8 R08:
>>> ffffffff9dd955a0 R09: 0000000000000035
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746857] R10: ffffffff9dd95980 R11:
>>> 000000009dd9559f R12: ffff9f1eebeca000
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746858] R13: ffff9f1e1bb67000 R14:
>>> ffff9f1eebb80000 R15: ffff9f1eebeca120
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746861] FS:  00007fd341ab0a80(0000)
>>> GS:ffff9f1eff780000(0000) knlGS:0000000000000000
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746863] CS:  0010 DS: 0000 ES: 0000
>>> CR0: 0000000080050033
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746865] CR2: 00000177088fa000 CR3:
>>> 000000046e046003 CR4: 0000000000760ee0
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746866] PKRU: 55555554
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746868] Call Trace:
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746930]  ?
>>> intel_set_cpu_fifo_underrun_reporting+0x89/0x2a0 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.746984]
>>> intel_ddi_pre_enable+0x98/0x340 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747000]  ?
>>> drm_dp_mst_topology_put_port+0x27/0x40 [drm_kms_helper]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747053]
>>> intel_mst_pre_enable_dp+0x9a/0x150 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747109]
>>> intel_encoders_pre_enable.isra.0+0x6b/0x80 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747163]
>>> haswell_crtc_enable+0x84/0x450 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747232]  ?
>>> intel_pipe_update_end+0x85/0x1b0 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747302]
>>> intel_update_crtc+0x35e/0x3e0 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747368]
>>> skl_update_crtcs+0x24f/0x2c0 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747436]
>>> intel_atomic_commit_tail+0x3eb/0x12e0 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747442]  ?
>>> flush_workqueue_prep_pwqs+0x12e/0x140
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747447]  ?
>>> flush_workqueue+0x193/0x420
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747514]  ?
>>> intel_atomic_commit_ready+0x4d/0x54 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747580]
>>> intel_atomic_commit+0x284/0x2b0 [i915]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747615]
>>> drm_atomic_commit+0x4a/0x50 [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747636]
>>> drm_atomic_connector_commit_dpms+0xdf/0x100 [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747660]
>>> drm_mode_obj_set_property_ioctl+0x156/0x2a0 [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747684]  ?
>>> drm_connector_set_obj_prop+0x90/0x90 [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747705]
>>> drm_connector_property_set_ioctl+0x3b/0x60 [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747722]  drm_ioctl_kernel+0xae/0xf0
>>> [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747739]  drm_ioctl+0x234/0x3d0 [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747758]  ?
>>> drm_connector_set_obj_prop+0x90/0x90 [drm]
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747764]  ? __switch_to_asm+0x40/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747767]  ? __switch_to_asm+0x34/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747769]  ? __switch_to_asm+0x40/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747772]  ? __switch_to_asm+0x34/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747775]  ? __switch_to_asm+0x40/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747777]  ? __switch_to_asm+0x34/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747780]  ? __switch_to_asm+0x40/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747782]  ? __switch_to_asm+0x34/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747785]  ? __switch_to_asm+0x40/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747787]  ? __switch_to_asm+0x34/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747790]  ? __switch_to_asm+0x40/0x70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747794]  ? __switch_to+0x1b2/0x470
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747799]  do_vfs_ioctl+0x407/0x670
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747801]  ? __schedule+0x2eb/0x740
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747804]  ksys_ioctl+0x67/0x90
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747807]  __x64_sys_ioctl+0x1a/0x20
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747811]  do_syscall_64+0x57/0x190
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747815]
>>> entry_SYSCALL_64_after_hwframe+0x44/0xa9
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747817] RIP: 0033:0x7fd341e1050b
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747821] Code: 0f 1e fa 48 8b 05 85
>>> 39 0d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3
>>> 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 55 39
>>> 0d 00 f7 d8 64 89 01 48
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747822] RSP: 002b:00007ffdbeeafca8
>>> EFLAGS: 00000246 ORIG_RAX: 0000000000000010
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747825] RAX: ffffffffffffffda RBX:
>>> 00007ffdbeeafce0 RCX: 00007fd341e1050b
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747826] RDX: 00007ffdbeeafce0 RSI:
>>> 00000000c01064ab RDI: 000000000000000e
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747827] RBP: 00000000c01064ab R08:
>>> 000055884cdb3060 R09: 0000000000000000
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747828] R10: 000055884cdb3060 R11:
>>> 0000000000000246 R12: 000055884db5ac70
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747830] R13: 000000000000000e R14:
>>> 000055884cdb2a20 R15: 000055884ca02138
>>>   Oct 14 21:09:41 lt9 kernel: [32059.747833] ---[ end trace
>>> 21c6e0ef255ea00b ]---
>>>
>>>   ProblemType: Bug
>>>   DistroRelease: Ubuntu 20.04
>>>   Package: linux-image-5.4.0-48-generic 5.4.0-48.52
>>>   ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
>>>   Uname: Linux 5.4.0-48-generic x86_64
>>>   ApportVersion: 2.20.11-0ubuntu27.8
>>>   Architecture: amd64
>>>   AudioDevicesInUse:
>>>    USER        PID ACCESS COMMAND
>>>    /dev/snd/controlC1:  dunlap     2447 F.... pulseaudio
>>>    /dev/snd/controlC0:  dunlap     2447 F.... pulseaudio
>>>   CasperMD5CheckResult: skip
>>>   CurrentDesktop: XFCE
>>>   Date: Wed Oct 14 21:44:32 2020
>>>   DistributionChannelDescriptor:
>>>    # This is the distribution channel descriptor for the OEM CDs
>>>    # For more information see
>>> http://wiki.ubuntu.com/DistributionChannelDescriptor
>>>    canonical-oem-somerville-focal-amd64-20200502-85
>>>   InstallationDate: Installed on 2020-08-04 (71 days ago)
>>>   InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary
>>> 20200502-05:58
>>>   MachineType: Dell Inc. XPS 13 9300
>>>   ProcFB: 0 i915drmfb
>>>   ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-48-generic
>>> root=UUID=2d9ccdcb-a33b-4e1c-be69-0390b3405c08 ro quiet splash vt.handoff=7
>>>   RelatedPackageVersions:
>>>    linux-restricted-modules-5.4.0-48-generic N/A
>>>    linux-backports-modules-5.4.0-48-generic  N/A
>>>    linux-firmware                            1.187.3
>>>   SourcePackage: linux
>>>   UpgradeStatus: No upgrade log present (probably fresh install)
>>>   dmi.bios.date: 08/13/2020
>>>   dmi.bios.vendor: Dell Inc.
>>>   dmi.bios.version: 1.2.0
>>>   dmi.board.name: 0RMFN5
>>>   dmi.board.vendor: Dell Inc.
>>>   dmi.board.version: A00
>>>   dmi.chassis.type: 10
>>>   dmi.chassis.vendor: Dell Inc.
>>>   dmi.modalias:
>>> dmi:bvnDellInc.:bvr1.2.0:bd08/13/2020:svnDellInc.:pnXPS139300:pvr:rvnDellInc.:rn0RMFN5:rvrA00:cvnDellInc.:ct10:cvr:
>>>   dmi.product.family: XPS
>>>   dmi.product.name: XPS 13 9300
>>>   dmi.product.sku: 096D
>>>   dmi.sys.vendor: Dell Inc.
>>>
>>> To manage notifications about this bug go to:
>>>
>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1899882/+subscriptions
>>>
>>