Public bug reported:
By returning my raspberry Pi4 to Linux ubuntu 5.4.0-1022-raspi, I was
able to verify that the lag is introduced between that version and Linux
ubuntu 5.4.0-1025-raspi. I do not appear to have anything intermediate
on my system. I also noted that under Wayland the neither the separate
cursor for the tablet or the mouse cursor shows lag in the newer kernel.
Unfortunately, I have no other clue as to what is going on.
The system report will show Linux ubuntu 5.4.0-1022-raspi as I have
rolled back to that to avoid the problem for now.
ubuntu 20.04.1 LTS
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-1022-raspi 5.4.0-1022.25
ProcVersionSignature: Ubuntu 5.4.0-1022.25-raspi 5.4.65
Uname: Linux 5.4.0-1022-raspi aarch64
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: arm64
CasperMD5CheckResult: skip
CurrentDesktop: LXQt
Date: Sat Dec 12 16:27:02 2020
ImageMediaBuild: 20200731
SourcePackage: linux-raspi
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-raspi (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 focal uec-images
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Packages, which is subscribed to linux-raspi in Ubuntu.
https://bugs.launchpad.net/bugs/1907922
Title:
Linux ubuntu 5.4.0-1025-raspi introduces cursor lag especially for
tablets
Status in linux-raspi package in Ubuntu:
New
Bug description:
By returning my raspberry Pi4 to Linux ubuntu 5.4.0-1022-raspi, I was
able to verify that the lag is introduced between that version and
Linux ubuntu 5.4.0-1025-raspi. I do not appear to have anything
intermediate on my system. I also noted that under Wayland the neither
the separate cursor for the tablet or the mouse cursor shows lag in
the newer kernel. Unfortunately, I have no other clue as to what is
going on.
The system report will show Linux ubuntu 5.4.0-1022-raspi as I have
rolled back to that to avoid the problem for now.
ubuntu 20.04.1 LTS
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-1022-raspi 5.4.0-1022.25
ProcVersionSignature: Ubuntu 5.4.0-1022.25-raspi 5.4.65
Uname: Linux 5.4.0-1022-raspi aarch64
ApportVersion: 2.20.11-0ubuntu27.13
Architecture: arm64
CasperMD5CheckResult: skip
CurrentDesktop: LXQt
Date: Sat Dec 12 16:27:02 2020
ImageMediaBuild: 20200731
SourcePackage: linux-raspi
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1907922/+subscriptions
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