| Summary: | Bad DisplayPort enumeration and wrong refresh rate with Hawaii chip | ||||||||||||||||
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| Product: | DRI | Reporter: | o0x84zzj1uu | ||||||||||||||
| Component: | DRM/AMDgpu | Assignee: | Default DRI bug account <dri-devel> | ||||||||||||||
| Status: | RESOLVED MOVED | QA Contact: | |||||||||||||||
| Severity: | normal | ||||||||||||||||
| Priority: | medium | CC: | harry.wentland, nicholas.kazlauskas, o0x84zzj1uu | ||||||||||||||
| Version: | DRI git | ||||||||||||||||
| Hardware: | x86-64 (AMD64) | ||||||||||||||||
| OS: | Linux (All) | ||||||||||||||||
| Whiteboard: | |||||||||||||||||
| i915 platform: | i915 features: | ||||||||||||||||
| Attachments: |
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Created attachment 143151 [details]
Xorg.1 log with DC off
Created attachment 143152 [details]
Xorg.0 log with DC on
Created attachment 143153 [details]
Xorg.1 log with DC on
Created attachment 143154 [details]
dmesg with DC off
Created attachment 143155 [details]
dmesg with DC on
(In reply to fabio0x from comment #0) > - I get microstuttering, particularly noticeable when I drag windows around. See bug 106175. -- 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/675. |
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Created attachment 143150 [details] Xorg.0 log with DC off I'm running Solus KDE with kernel 4.20.2 but I've had these issues since kernel 4.19. Here's the list of issues with AMDGPU DC enabled: - With Solus' default kernel flags I have wrong DisplayPort enumeration, meaning that I get DisplayPort-1 when I turn on the computer, and then DisplayPort-2 when I get my monitor to sleep and then I wake it up. - If I put my computer on sleep (suspension) and then wake it up, I cannot set a usable refresh rate. This means I actually get 40 Hz when I set 60, and 45 Hz when I set 74 (yeah, I have a bit of screen "overclocking". That's how I found DisplayPort enumeration is wrong). - I get microstuttering, particularly noticeable when I drag windows around. Now, all these issues are non existant if I set the amdgpu.dc=0 kernel flag. Also, DisplayPort number is DisplayPort-0 under any circumstances. ❯ inxi -G Graphics: Device-1: AMD Hawaii PRO [Radeon R9 290/390] driver: amdgpu v: kernel Display: x11 server: X.Org 1.20.3 driver: amdgpu,ati unloaded: fbdev,modesetting,vesa resolution: 1920x1080~60Hz OpenGL: renderer: AMD Radeon R9 200 Series (HAWAII DRM 3.27.0 4.20.2-107.current LLVM 7.0.0) v: 4.5 Mesa 18.3.1