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...n 8, meaning an alpha channel is present. 3. Try to read pixels with glReadPixels and GL_BGRA_EXT. The resulting image has an alpha channel which sets the pixels to be completely transparent. Editing the image with gimp reveals that inverting the alpha channel makes the image correct. Software is wlroots [1] with grim [2]. To reproduce, compile both, start rootston, run grim. Let me know if you need more info. [1]: https://github.com/swaywm/wlroots [2]: https://github.com/emersion/grim -- You are receiving this mail because: You are the QA Contact for the bug. You are the assignee for the bug. -...

...plane, it is moved to NOUVEAU_GBM_DOMAIN_VRAM. If the rendering operations haven't finished at this point, the copied buffer is empty. Note that since this is a timing issue it might not be reproducible in all situations. This was tested on different GPUs (GTX 1080 and GT 445M) with rootston (wlroots example wayland compositor: https://github.com/swaywm/wlroots , git commit b2f56ad4) running weston-terminal (this makes the issue appear more frequently) Probably the driver should wait for pending rendering operations on the surface before moving it around. Another possibility for the scenario l...