| Summary: |
modesetting driver + amdgpu.dc=1 always enforces vsync |
| Product: |
xorg
|
Reporter: |
tempel.julian |
| Component: |
Driver/AMDgpu | Assignee: |
xf86-video-ati maintainers <xorg-driver-ati> |
| Status: |
RESOLVED
NOTOURBUG
|
QA Contact: |
Xorg Project Team <xorg-team> |
| Severity: |
normal
|
|
|
| Priority: |
medium
|
|
|
| Version: |
git | |
|
| Hardware: |
x86-64 (AMD64) | |
|
| OS: |
Linux (All) | |
|
| Whiteboard: |
|
|
i915 platform:
|
|
i915 features:
|
|
|---|
| Attachments: |
|
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.
Created attachment 143158 [details] dmesg log When amdgpu.dc=1 and modesetting driver are used at the same time, fps in 3D applications can't exceed monitor refreshrate and there is always no tearing, despite of vsync enabled or not in the applications. Happens with both radeonsi and radv. For OGL apps, forcing vsync off via vblank_mode=0 also doesn't show any effect in this case. The issue doesn't occur with amdgpu.dc=0 + modesetting or with xf86-video-amdgpu. Though I think having an option for globally enforcing vsync would be tempting if an application doesn't offer vsync for whatever reasons. radv and amdvlk also don't offer options to enforce vsync, just radeonsi does. Perhaps it could be a sub-option for TearFree? linux drm-next-5.1-wip 5acc93145bf97a0d59ee65255cae8e1bd0623b07 xorg-server 1.20.3