After the latest update on 7/21/20 the screen shows random black horizontal single pixel line stripes in columns about 10-20 pixels long on open windows and icons presented on the desktop.

[Mauro Dresti]

Everything else works well in the system except for this issue. See attached picture for details.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nautilus (not installed)
ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
Uname: Linux 5.4.0-42-generic i686
ApportVersion: 2.20.9-0ubuntu7.15
Architecture: i386
CurrentDesktop: MATE
Date: Thu Jul 23 08:14:26 2020
InstallationDate: Installed on 2019-12-08 (228 days ago)
InstallationMedia: Ubuntu-MATE 18.04.3 LTS "Bionic Beaver" - Release i386 (20190805)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.15
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mauro 2001 F.... pulseaudio
CurrentDesktop: MATE
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2019-12-08 (229 days ago)
InstallationMedia: Ubuntu-MATE 18.04.3 LTS "Bionic Beaver" - Release i386 (20190805)
MachineType: IBM 2373C96
Package: linux (not installed)
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   no card
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-62-generic root=UUID=14567323-8391-4f6b-9169-c617d286cadb ro forcepae quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 5.3.0-62.56~18.04.1-generic 5.3.18
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-62-generic N/A
 linux-backports-modules-5.3.0-62-generic N/A
 linux-firmware 1.173.19
RfKill:
 0: tpacpi_bluetooth_sw: Bluetooth
  Soft blocked: yes
  Hard blocked: no
Tags: bionic
Uname: Linux 5.3.0-62-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 06/18/2007
dmi.bios.vendor: IBM
dmi.bios.version: 1RETDRWW (3.23 )
dmi.board.name: 2373C96
dmi.board.vendor: IBM
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: IBM
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnIBM:bvr1RETDRWW(3.23):bd06/18/2007:svnIBM:pn2373C96:pvrThinkPadT42p:rvnIBM:rn2373C96:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
dmi.product.name: 2373C96
dmi.product.version: ThinkPad T42p
dmi.sys.vendor: IBM

[Mauro Dresti (mateinla)]

The kernel causing the problem is 5.4.0-42-generic. rolling back to 5.3.0-62-generic eliminated the problem.

[Sebastien Bacher (seb128)]

Thanks, reassigning to the linux component since you say it's a kernel bug

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1888703

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Mauro Dresti (mateinla)]

apport information

[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

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[Mauro Dresti (mateinla)]

Done - please note that during the execution of the previous step "apport-collect 1888703" I used the 5.3.0-62-generic kernel and not the problematic one 5.4.0-42-generic as the screen is hard to decipher. Please let me know if you would like me to go through the effort again using the problematic kernel (i.e. 5.4.0-42-generic).

[Mauro Dresti (mateinla)]

On 9/4/2020 auto updated to kernel 5.4.0-45. This did not fix the display issue. Still operating under 5.3.0-62 as a workaround.

[Mauro Dresti (mateinla)]

OK, to close this out. I manually purged 5.4.0-47, headers and modules and manually loaded up 5.4.0-48, headers and modules and everything is fine now. So I'm thinking something was broken on the previous kernels and is now working.