[radeon] kernel bug causing screen corruption on AMD GPU

[Matthew Bradley]

Hi,

I'm running Ubuntu MATE 18.04.6 LTS. The bug information was sadly collected from the working configuration of the system after dropping to an earlier kernel.

This bug is a display bug where 1-pixel horizontal lines of multicolored corruption or occasionally incorrect screen contents appear across the screen, particularly during scrolling or moving the mouse. They appear intermittently, being more common near the top of the screen.

My GPU is the built-in one on the AMD A10-5750M APU, the Radeon HD 8650G. (Laptop: G505s)

I have found that this bug occurs on vmlinuz-5.4.0-96-generic but does not appear to occur on vmlinuz-5.4.0-91-generic when booting with that option in GRUB.

I have not yet been able to capture an image of the issue as it becomes difficult to use the system when the bug occurs (though it appears to be fully functional, graphics aside). If very important I can try again later.

-Matt

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 5.4.0-91.102~18.04.1-generic 5.4.151
Uname: Linux 5.4.0-91-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: MATE
Date: Thu Jan 20 14:05:30 2022
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.271+bdcom, 5.4.0-91-generic, x86_64: installed
 bcmwl, 6.30.223.271+bdcom, 5.4.0-94-generic, x86_64: installed
 bcmwl, 6.30.223.271+bdcom, 5.4.0-96-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Richland [Radeon HD 8650G] [1002:990b] (prog-if 00 [VGA controller])
   Subsystem: Lenovo Richland [Radeon HD 8650G] [17aa:397c]
InstallationDate: Installed on 2019-12-28 (754 days ago)
InstallationMedia: Ubuntu-MATE 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
MachineType: LENOVO 20255
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-91-generic root=UUID=3e3ee235-a725-4a35-a01f-8c156ee072f1 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/08/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: 83CN53WW(V3.00)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lenovo G505s
dmi.board.vendor: LENOVO
dmi.board.version: 31900003Std
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo G505s
dmi.modalias: dmi:bvnLENOVO:bvr83CN53WW(V3.00):bd01/08/2014:svnLENOVO:pn20255:pvrLenovoG505s:rvnLENOVO:rnLenovoG505s:rvr31900003Std:cvnLENOVO:ct10:cvrLenovoG505s:
dmi.product.family: IDEAPAD
dmi.product.name: 20255
dmi.product.sku: LENOVO_MT_20255
dmi.product.version: Lenovo G505s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
version.libdrm2: libdrm2 2.4.101-2~18.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.8-0ubuntu1~18.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.8-0ubuntu1~18.04.1
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A