Thanks for the bug report.
Most intermittent black screen flickers are caused by a loss of display
signal integrity. It's especially common at high resolutions or refresh
rates (I notice you're using 4K). That can usually be fixed by replacing
the display cable and/or taking the dock out of the equation. So three
things to try:
1. A new (higher grade) cable.
2. Another new cable that bypasses the dock (USB-C to DisplayPort or
whatever you need).
3. Next time the problem happens, immediately run this command:
journalctl -b0 > journal.txt
and attach the resulting text file here, in case something relevant
is being logged.
** Package changed: xorg (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: multimonitor
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/2076264
Title:
Secondary external display intermittently goes black
Status in linux package in Ubuntu:
Incomplete
Bug description:
After upgrade to mantic, running with primary laptop display and
secondary display via a dock, the secondary display will
intermittently go black for 1-2 seconds. This was happening a few
times a week, and at the moment started happening once every few
minutes.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.8.0-39.39-generic 6.8.8
Uname: Linux 6.8.0-39-generic x86_64
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 7 12:34:10 2024
DistUpgraded: 2024-05-20 16:37:33,170 DEBUG migrateToDeb822Sources()
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation Raptor Lake-P [Iris Xe Graphics] [8086:a7a1] (rev 04)
(prog-if 00 [VGA controller])
Subsystem: Lenovo Raptor Lake-P [Iris Xe Graphics] [17aa:2315]
InstallationDate: Installed on 2023-12-17 (235 days ago)
InstallationMedia: Ubuntu Legacy 23.10 "Mantic Minotaur" - Release amd64
(20231010)
MachineType: LENOVO 21HM002GUS
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-39-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to noble on 2024-05-20 (79 days ago)
dmi.bios.date: 05/13/2024
dmi.bios.release: 1.29
dmi.bios.vendor: LENOVO
dmi.bios.version: N3XET54W (1.29 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21HM002GUS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76530 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.19
dmi.modalias:
dmi:bvnLENOVO:bvrN3XET54W(1.29):bd05/13/2024:br1.29:efr1.19:svnLENOVO:pn21HM002GUS:pvrThinkPadX1CarbonGen11:rvnLENOVO:rn21HM002GUS:rvrSDK0T76530WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21HM_BU_Think_FM_ThinkPadX1CarbonGen11:
dmi.product.family: ThinkPad X1 Carbon Gen 11
dmi.product.name: 21HM002GUS
dmi.product.sku: LENOVO_MT_21HM_BU_Think_FM_ThinkPad X1 Carbon Gen 11
dmi.product.version: ThinkPad X1 Carbon Gen 11
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2build1
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.9-0ubuntu0.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.17-2build1
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