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Hello, last week I was digging in the BIOS of my PC at work since I tried to
see if there is a way to update the dbx for secure boot. Since there was no
option to perform this task, I modified some settings. In detail, I disabled
CSM in BIOS and that's when hell broke loose!
To get an idea about the hardware, the Lenovo machine isn't running the
latest BIOS as its updater is broken and won't update it within win or
its ISO image. It uses the previous version released by its
manufacturer.
The machine has an XGA VGA monitor and a WQHD DP monitor. When CSM is enabled
the DP monitor is lit first and then the VGA one prior OS loading. When CSM is
disabled it goes the other way around. The VGA monitor is lit and the DP one
opens up during OS load. With CSM disabled the VGA monitor is the primary one
and it is corrupted as you can see on the pictures I have attached.
Interestingly printing screens within Ubuntu does not capture the corruption
problem I am getting as you can see on the pictures I have also attached.
Neither X log contains anything useful. The issue is repeatable on every boot.
As I have seen on other bug reports, I have enabled DRM debug, captured
the dmesg using a huge buffer to get it and have uploaded it as well. I
hope that it will help you track this issue down and fix it soon. Since
I will be away some days for vacation, I will have physical access to it
till this Friday and will get back to work at the 24th of August. In the
mean time, I hope that someone will pinpoint the root cause of it and
prepare a patch.
Since this machine is running w10 2004, it should be noted that in win I
do not get any corruption at all either in CSM mode or UEFI mode.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CasperVersion: 1.445
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 5 11:30:51 2020
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
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]
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
MachineType: LENOVO 3209C54
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/username.seed
maybe-ubiquity quiet splash ---
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/17/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: 9SKT9BAUS
dmi.board.name: MAHOBAY
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.type: 3
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvr9SKT9BAUS:bd07/17/2018:svnLENOVO:pn3209C54:pvrThinkCentreM92p:rvnLENOVO:rnMAHOBAY:rvrNotDefined:cvnLENOVO:ct3:cvrNone:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: 3209C54
dmi.product.sku: LENOVO_MT_3209
dmi.product.version: ThinkCentre M92p
dmi.sys.vendor: LENOVO
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 N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
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 corruption focal third-party-packages ubuntu
--
Screen corruption with multi monitor setup
https://bugs.launchpad.net/bugs/1890436
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