Fix slow refresh rate when AMD GPU screen in reverse prime mode
Bug #1987038 reported by
Kai-Heng Feng
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
xserver-xorg-video-amdgpu (Ubuntu) |
Fix Released
|
Medium
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned | ||
Jammy |
Fix Released
|
Medium
|
Unassigned | ||
Kinetic |
Fix Released
|
Medium
|
Unassigned |
Bug Description
[Impact]
When AMD GPU is a GPU screen using reverse prime and its the only display, the fresh rate is very slow.
[Fix]
Enable present extension for GPU screen so it can be a viable CRTC to be selected.
[Test]
On a I+A laptop and external displays are routed to AMDGPU, disable internal display like closing lid can observe the issue.
With the fix applied, the external display becomes very smooth.
[Where problems could occur]
I personally don't see why GPU screen can't use present extension, but this is Xorg so there might be some arcane reasons I didn't think of.
Changed in xserver-xorg-video-amdgpu (Ubuntu Jammy): | |
status: | New → Confirmed |
Changed in xserver-xorg-video-amdgpu (Ubuntu Kinetic): | |
status: | New → Confirmed |
importance: | Undecided → Medium |
Changed in xserver-xorg-video-amdgpu (Ubuntu Jammy): | |
importance: | Undecided → Medium |
tags: | added: oem-priority originate-from-1979015 stella |
Changed in hwe-next: | |
status: | New → Fix Released |
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debdiff for Unstable/Kinetic.