This bug is awaiting verification that the linux-oem-5.14/5.14.0-1033.36 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-focal -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.14 in Ubuntu. https://bugs.launchpad.net/bugs/1964850 Title: Choppy trackpad/USB mouse behavior with oem-1023 or above kernel version Status in HWE Next: New Status in linux package in Ubuntu: Fix Released Status in linux-oem-5.14 package in Ubuntu: Invalid Status in linux source package in Focal: Invalid Status in linux-oem-5.14 source package in Focal: Fix Committed Status in linux source package in Jammy: Fix Released Status in linux-oem-5.14 source package in Jammy: Invalid Bug description: [SRU Justfication] [Impact] Disjoint trackpad/mouse path found on PSR capable panels. [Fix] Two fixes from v5.17-rc6 that only turns off vblank IRQs when PSR is not enabled, originally for commit f94cf1cb1796 ("drm/amdgpu/display: set vblank_disable_immediate for DC") that was being backported to LTS stable 5.15.y, and therefore oem-5.14. [Test Case] Simply move the mouse around. [Where problems could occur] This follows for AMD platforms, the power-saving performance may not be as good as before, but while we don't have such energy-saving certificate program for AMD yet, this would become something to be fully addressed in the future. [Other Info] These fixes have been applied to v5.15.27, and oem-5.14 currently has v5.15.25 in -1028, therefore only oem-5.14 is nominated, but probably they will still be included through stable patch backport in the next release. ========== original bug report ========== Observed choppy issue for touchpad on HP Lockheed with OEM-1025 kernel, and can't smoothly drag USB mouse if connected. Rolled back to OEM-1023 kernel and observed the same issues. Can't reproduce the issue with OEM-1022 kernel. Bisect identified the problematic commits below, 021e2c1f6143 drm/amdgpu/display: set vblank_disable_immediate for DC 1a4dd5a679da drm/amd/display: check top_pipe_to_program pointer Reverting above 2 commits on the top of oem-5.14-5.14.0-1025.27, touchpad or USB mouse back to normal working behavior on HP Lockheed and we don't see choppy trackpad/mouse issue. $ git log --oneline -5 62e596025e1e (HEAD -> fm_oem-5.14-next) Revert "drm/amd/display: check top_pipe_to_program pointer" 82cab088605f Revert "drm/amdgpu/display: set vblank_disable_immediate for DC" 165041ee003c (tag: Ubuntu-oem-5.14-5.14.0-1025.27, origin/oem-5.14-next) UBUNTU: Ubuntu-oem-5.14-5.14.0-1025.27 8bdd3e2ea820 UBUNTU: [Config] Update config to match upstream stable release 43f3b8b56abe UBUNTU: debian/dkms-versions -- update from kernel-versions (main/2022.02.21) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1964850/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
