Originally posted by mulenmar
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xf86-video-amdgpu 21.0.0 Released For Radeon Linux Users Still On X.Org
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bridgman
I have a couple of old HD 7970 GPUs that are still perfectly functional, which I use to drive a 2x4K monitor setup (thank you AMD for being forward looking enough to include mDP ports that can drive 4K@60Hz displays on such old hardware).
When I use the amdgpu DRM kernel driver without amdgpu.dc=1, I can maintain 2x4K resolutions perfectly fine.
However, when I use the amdgpu DRM kernel driver with amdgpu.dc=1, I can only maintain 1920x1080p resolutions; anything higher than that and I get weird graphics artefacts where it looks like the whole image has been fed through a scanline filter w/some strange displacement.
This bug happens on multiple distros with identical outcome and happens w/both Wayland and XOrg.
Where and to whom should I report this and what kind of info should I include?
Guidance welcome. =)
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Originally posted by bridgman View PostAFAIK both xf86-video-amdgpu and xf86-video-modesetting are X drivers, and not required for Wayland, although I think you still need them for XWayland.
And the article is wrong, as the xf86-video-amdgpu driver for Xorg is still very recommendable by offering VRR in a stable release, has a more stable hardware cursor and automatically offers GPU upscaling resolutions with amdgpu.dc...
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Originally posted by DanL View Post@Michael: "these X.Org DDX releases are of little value"
That is ridiculous. Just because X is old and boring from your standpoint doesn't mean maintenance releases are of little value. Slanted "journalism".
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Originally posted by ermo View Postbridgman
I have a couple of old HD 7970 GPUs that are still perfectly functional, which I use to drive a 2x4K monitor setup (thank you AMD for being forward looking enough to include mDP ports that can drive 4K@60Hz displays on such old hardware).
When I use the amdgpu DRM kernel driver without amdgpu.dc=1, I can maintain 2x4K resolutions perfectly fine.
However, when I use the amdgpu DRM kernel driver with amdgpu.dc=1, I can only maintain 1920x1080p resolutions; anything higher than that and I get weird graphics artefacts where it looks like the whole image has been fed through a scanline filter w/some strange displacement.
This bug happens on multiple distros with identical outcome and happens w/both Wayland and XOrg.
Where and to whom should I report this and what kind of info should I include?
Guidance welcome. =)
If things work well without DC, I recommend to simply continue using it without DC.
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Originally posted by bridgman View Post
AFAIK both xf86-video-amdgpu and xf86-video-modesetting are X drivers, and not required for Wayland, although I think you still need them for XWayland.
Xwayland has no drivers, just built-in GBM & EGLStream backends for glamor. Everything else works via the Wayland protocol.
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Originally posted by Venemo View Post
This is the place to report your bug: https://gitlab.freedesktop.org/drm/amd
If things work well without DC, I recommend to simply continue using it without DC.
Are you the person who was kind enough to port the DC code to the GCN1.0/1.1 hardware?
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Originally posted by DanL View Post@Michael: "these X.Org DDX releases are of little value"
That is ridiculous. Just because X is old and boring from your standpoint doesn't mean maintenance releases are of little value. Slanted "journalism".
Personally I am pleased that they have updated it, because out there, like it or not, there are a lot of users and companies that still use Xorg.
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