Public bug reported:
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)
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: High
Assignee: You-Sheng Yang (vicamo)
Status: Triaged
** Affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-5.14 (Ubuntu Focal)
Importance: High
Assignee: You-Sheng Yang (vicamo)
Status: In Progress
** Affects: linux (Ubuntu Jammy)
Importance: High
Assignee: You-Sheng Yang (vicamo)
Status: Triaged
** Affects: linux-oem-5.14 (Ubuntu Jammy)
Importance: Undecided
Status: Invalid
** Tags: amd oem-priority originate-from-1962738
** Tags added: amd oem-priority originate-from-1962738
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https://bugs.launchpad.net/bugs/1964850
Title:
Choppy trackpad/USB mouse behavior with oem-1023 or above kernel
version
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