This appears to be a desktop machine so please don't install any
brightness controlling software as that's likely to cause more problems
than it solves. You should adjust the brightness on the TV itself.
Also please try a different VGA cable if you can. Or at least unplug
both ends and plug them in again firmly.
** Package changed: xorg (Ubuntu) => linux-oem-5.14 (Ubuntu)
** Summary changed:
- Screen flickering or going black
+ [i915] Screen flickering or going black
** Summary changed:
- [i915] Screen flickering or going black
+ [i915] TV connected by VGA is flickering or going black
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Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1955632
Title:
[i915] TV connected by VGA is flickering or going black
Status in linux-oem-5.14 package in Ubuntu:
New
Bug description:
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
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