| Bug ID | 107459 |
|---|---|
| Summary | Atomically set gamma ramps are not applied until TTY switch |
| Product | DRI |
| Version | unspecified |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | sir@cmpwn.com |
When atomically setting gamma ramps on AMDGPU (specifically ), the changes don't take effect until switching to another TTY and back again. Using the legacy DRM interface works as expected. To reproduce, build and run the rootston Wayland compositor: https://github.com/swaywm/wlroots We will shortly be merging this patch for a new gamma control protocol extension, which you will need to apply if we haven't merged it by the time you attempt it: https://github.com/swaywm/wlroots/pull/1157 An sample program will be available in the build directory, ./examples/gamma-control, which can adjust gamma. By default this will use the atomic interface, set WLR_DRM_NO_ATOMIC=1 before starting rootston to use the legacy interface. Our atomic gamma code is here: https://github.com/swaywm/wlroots/blob/master/backend/drm/atomic.c#L199-L230
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