Public bug reported:
I've been using Ubuntu 20.04 for a long time now and have had no problems. Then
suddenly the screen started flickering. I tried PCLinuxOS but the screen just
goes black. I found, on Ubuntu, installing brightness-controller and putting
the screen brightness down below half way and the setting to Clear Blue Sky
helps quite a lot but is hard to see. It still flickers once in awhile. And I
cannot create a file in /sys/class/backlight to make the change permanent on
boot. The only major change I can think of is setting LivePatch up that could
have caused the flickering.
Thank you, I hope you find the fix as no Linux distros will work on my
ThinkCentre desktop PC.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.14.0-1011.11-oem 5.14.17
Uname: Linux 5.14.0-1011-oem x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Dec 23 01:52:31 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
rtl8821CU, 5.4.1, 5.11.0-43-generic, x86_64: installed
rtl8821CU, 5.4.1, 5.14.0-1011-oem, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
[8086:0152] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
[17aa:3083]
InstallationDate: Installed on 2021-10-16 (68 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
MachineType: LENOVO 3227K45
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.14.0-1011-oem
root=UUID=e7536889-191e-4640-ba6f-6e940cb65228 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/11/2018
dmi.bios.release: 0.6
dmi.bios.vendor: LENOVO
dmi.bios.version: 9SKT9CAUS
dmi.board.asset.tag: 640688
dmi.board.name: MAHOBAY
dmi.board.vendor: LENOVO
dmi.board.version: 0B98401 PRO
dmi.chassis.type: 3
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvr9SKT9CAUS:bd12/11/2018:br0.6:svnLENOVO:pn3227K45:pvrThinkCentreM92P:rvnLENOVO:rnMAHOBAY:rvr0B98401PRO:cvnLENOVO:ct3:cvrNone:skuLENOVO_MT_3227:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: 3227K45
dmi.product.sku: LENOVO_MT_3227
dmi.product.version: ThinkCentre M92P
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.105-3~20.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.3-0ubuntu0.3~20.04.5
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.2
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
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal ubuntu
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https://bugs.launchpad.net/bugs/1955632
Title:
Screen flickering or going black
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https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1955632/+subscriptions
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