| Bug ID | 103317 |
|---|---|
| Summary | Tearing in WQHD, but not in FHD |
| 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 | torkes94@gmail.com |
Created attachment 134888 = [details] X server log Hi all, I'm using Arch Linux with kernel 4.13.5-1-ARCH, Xorg 1.19.5 and the amdgpu driver, version 1.4. My GPU is a R9 390. I attached the X server log. My window manager is i3. Entries in xorg.conf.d: 20-amdgpu.conf Section "Device" Identifier "AMD R9 390" Driver "amdgpu" Option "DRI" "3" Option "TearFree" "true" EndSection With this setup I experience screen tearing and flickering on a WQHD monito= r. Enabling a compositor like compton makes these effects worse. I can reproduce this issue on the same machine with KDE instead of i3. To give you an idea of my problem, I captured a scene from the RTS 0ad: https://youtu.be/ZhjPpB7djyk The same kind of flickering and tearing also happens in desktop mode. It se= ems to appear randomly. However, the problem disappears when I'm using the radeonsi driver or chang= ing the resolution to FHD. In both cases everything is fine.
Created attachment 134889 =
[details]
Dmesg output
| What | Removed | Added |
|---|---|---|
| Attachment #134888 mime type | text/x-log | text/plain |
| What | Removed | Added |
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| Attachment #134889 mime type | text/x-log | text/plain |
Please attach the output of xrandr --verbose while the problem occurs (i.e. while e.g. 0ad is running and showing flickering). Does not enabling TearFree or Option "EnablePageFlip" "off" avoid the problem?
Created attachment 13=
4912 [details]
Output of xrandr --verbose
As suggested I turned EnablePageFlip off:
Section "Device"
Identifier "AMD R9 390"
Driver "amdgpu"
Option "DRI" "3"
Option "EnablePageFlip" "off"
# Option "TearFree" "true"
EndSection
But this doesn't avoid the problem. As before, everything works fine when I
switch to FHD or radeonsi.
| What | Removed | Added |
|---|---|---|
| Attachment #134912 mime type | text/x-log | text/plain |
(In reply to Torsten Kessler from comment #3) > As suggested I turned EnablePageFlip off: [...] > But this doesn't avoid the problem. Please attach the corresponding Xorg log file. > As before, everything works fine when I switch t= o FHD or radeonsi. You cannot "switch to radeonsi", I assume you mean when you use t= he radeon kernel driver instead of amdgpu. The Mesa radeonsi driver is used in both cases. You might want to try a kernel built from the amd-staging-drm-next branch of https://cgit.freedes= ktop.org/~agd5f/linux/ with CONFIG_DRM_AMD_DC=3Dy at build time and amdgpu.dc=3D1 at runtime, to see if that works better.
Created attachment 134943 [detail=
s]
Second Xorg log with EnablePageFlip turned off
You're right. I was mixing things up. I meant loading the radeon module and
blacklisting the amdgpu module solves the issue.
I'm just downloading the kernel from the amd-staging-drm-next branch. I will
see tomorow if it helps. Thank you for your help so far!
The new display engine (amdgpu.dc=3D1) definitely helps. It ne= arly eliminates the flickering during videos or browsing. It has no effect on 3D applications, = for example 0ad. There seems to be a bug in the amd-staging-drm-next branch. Rotating the sc= reen with xrandr results in a blackscreen. But this will be a different bug repo= rt. That's why I using the kernel from the amd-staging-4.13 branch with amdgpu.dc=3D1.
| What | Removed | Added |
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| Attachment #134943 mime type | text/x-log | text/plain |
| What | Removed | Added |
|---|---|---|
| CC | harry.wentland@amd.com, jordan.lazare@amd.com |
(In reply to Torsten Kessler from comment #6) > The new display engine (amdgpu.dc=3D1) definitel= y helps. It nearly eliminates > the flickering during videos or browsing. It has no effect on 3D > applications, for example 0ad. Adding DC developers to Cc. I'm afraid at this point it's unlikely that this issue will be fixed in the non-DC code.
| What | Removed | Added |
|---|---|---|
| Status | NEW | RESOLVED |
| Resolution | --- | MOVED |
-- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this = link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/246.