Comment # 14
on bug 101499
from Michel Dänzer
(In reply to Carlo Caione from comment #12) > I just tried the HEAD of xf86-video-amdgpu and now instead of having a black > screen I have the image corruption as shown in the picture. Without seeing the corresponding Xorg log, I guess that's just a different symptom triggered by the same issue. > Anything I can do to debug / have this fixed? We need to make scanout work with buffers outside of VRAM somehow. I've kicked off an internal discussion about this. With an amd-staging-* kernel branch and DC enabled, you can try tweaking dce_v11_0_crtc_do_set_base to pass AMDGPU_GEM_DOMAIN_GTT instead of / in addition to AMDGPU_GEM_DOMAIN_VRAM to amdgpu_bo_pin. The DC code should already handle this correctly, but we're not sure whether or not there are additional constraints on system memory used for scanout. If there are, it probably won't work correctly yet. > Is it something I need to fix with the ODM (acer)? If you can get a BIOS which allows setting up larger VRAM, that might allow you to move forward faster.
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