Public bug reported:
Today I upgraded from Ubuntu MATE 19.10 to 20.04. After doing so, Ubuntu boots
normally to the display manager (login screen) as expected. But once I log in,
everything on the screen is cut up into horizontal slices, with each slice
offset farther right than the slice above, and squares of random colors running
diagonally across the screen. I've attached a picture of my monitor showing the
issue for reference.
My hardware is a home-built PC with an ASUS Prime B450M motherboard, a Ryzen 3
2200G APU, and using that APU's integrated graphics.
In terms of software I'm running Ubuntu 20.04, which I just upgraded to and did
a software update on. I have Linux 5.4.0-33-generic, X.Org 1.20.8, and Mesa
20.0.4. Before I upgraded Ubuntu, I was affected by Bug #1880041 but it seems
fixed in the new kernel. I don't believe they're related but I figure it's
worth mentioning.
I tried adding the nomodeset kernel option at boot, and it's an effective
workaround. Also, I tried booting from an Ubuntu Mate 20.04 live USB to see if
this was caused by some quirk of my particular software setup, and successfully
reproduced the bug, proving it wasn't.
If you'd like me to, I can provide log files, system information, etc. or help
narrow it down by testing workarounds.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-core 2:1.20.8-2ubuntu2.1
ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
Uname: Linux 5.4.0-33-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
CasperMD5CheckResult: skip
CompositorRunning: None
Date: Mon Jun 8 06:41:47 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExecutablePath: /usr/lib/xorg/Xorg
ExtraDebuggingInterest: Yes
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series /
Radeon Vega Mobile Series] [1002:15dd] (rev c8) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Raven Ridge [Radeon Vega Series / Radeon
Vega Mobile Series] [1043:876b]
InstallationDate: Installed on 2019-10-20 (231 days ago)
InstallationMedia: Ubuntu-MATE 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: System manufacturer System Product Name
ProcEnviron: PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic
root=UUID=43189257-cc94-4e98-ac1d-e16336dd152e ro quiet splash vt.handoff=7
SourcePackage: xorg-server
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/13/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2006
dmi.board.asset.tag: Default string
dmi.board.name: PRIME B450M-A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr2006:bd11/13/2019:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEB450M-A:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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
** Affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal ubuntu
** Attachment added: "Photo of screen corruption"
https://bugs.launchpad.net/bugs/1882525/+attachment/5381613/+files/display-issue.jpg
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https://bugs.launchpad.net/bugs/1882525
Title:
Display is corrupted upon login on Ryzen APU
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