This change was made by a bot.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1884001
Title:
[Ice Lake] External 4k monitor periodically shows black screen
Status in linux package in Ubuntu:
Confirmed
Bug description:
I have a 4k dell monitor attached to a Dell XPS13 (2020). The connection is:
Computer -> Thunderbolt (USBC) Cable -> Caldigit Thunderbolt Hub ->
Thunderbolt-to-Displayport Cable -> Monitor.
Note: The Thunderbolt cable from the Caldigit hub is powered. I have a
keyboard, mouse, monitor etc all attached to the thunderbolt hub. So
there is just one cable connected to the laptop, which is nice.
If I wake my laptop, everything's fine for a few minutes, then
periodically the screen goes black for a second or two, then back to
display. This happens with increasing frequency. If I log out and log
back in, the problem is usually resolved. Sometimes I have to unplug
and replug the hub from my laptop.
I assume this is xorg-related because logging out and back in
effectively restarts X. But X might not be the problem, it might be
thunderbolt-related.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
Uname: Linux 5.4.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 17 18:22:45 2020
DistUpgraded: 2020-04-28 11:49:08,077 DEBUG Running PostInstallScript:
'./xorg_fix_proprietary.py'
DistributionChannelDescriptor:
# This is the distribution channel descriptor for the OEM CDs
# For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-bionic-amd64-20190418-59+beaver-osp1+X00
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation Iris Plus Graphics G7 [8086:8a52] (rev 07) (prog-if 00
[VGA controller])
Subsystem: Dell Iris Plus Graphics G7 [1028:096d]
InstallationDate: Installed on 2020-03-14 (95 days ago)
InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary
20190418-12:10
MachineType: Dell Inc. XPS 13 9300
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-37-generic
root=UUID=15b70d1f-6d44-4cea-a1ad-10b0924bc69b ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-04-28 (50 days ago)
dmi.bios.date: 05/08/2020
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.0.11
dmi.board.name: 077Y9N
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.0.11:bd05/08/2020:svnDellInc.:pnXPS139300:pvr:rvnDellInc.:rn077Y9N:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 9300
dmi.product.sku: 096D
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
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