Bug 109017

Summary: The drop in resolution with AMD Kaveri
Product: DRI Reporter: Dmitry <terapy-session>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
xorg log
none
dmesg log none

Description Dmitry 2018-12-11 17:09:52 UTC 
Resolution drop with AMD Kaveri when using xf86-video-amdgpu driver. At best, up to 1600x900, sometimes up to 1024x768. And the modes above are not available.

DP connection. Monitor resolution 1080p.
Distr: Arch
DRM driver: amdgpu
Options root= amdgpu.cik_support=1 radeon.cik_support=0
Comment 1 Michel Dänzer 2018-12-11 17:17:13 UTC 
Please attach the output of dmesg and the Xorg log file.
Comment 2 Dmitry 2018-12-11 17:39:25 UTC 
Created attachment 142777 [details]
xorg log
Comment 3 Dmitry 2018-12-11 17:44:27 UTC 
Created attachment 142778 [details]
dmesg log
Comment 4 Michel Dänzer 2018-12-12 11:28:49 UTC 
Looks like the kernel driver fails to retrieve the EDID of the monitor. Does

 amdgpu.dc=1

on the kernel command line help? If not, please attach the corresponding logs again.
Comment 5 Dmitry 2018-12-12 11:34:04 UTC 
Not do. On this version of the kernel, it is by default dc=1
Comment 6 Michel Dänzer 2018-12-12 11:35:46 UTC 
Please try it anyway. The attached dmesg shows DC being disabled.
Comment 7 Dmitry 2018-12-12 12:18:51 UTC 
With the option DC=1 in the black screen. accordingly, dmesg can't do
Comment 8 Alex Deucher 2019-02-15 14:29:59 UTC 
Please attach your dmesg output and xorg log with amdgpu.dc=1
Comment 9 Dmitry 2019-03-11 15:32:56 UTC 
Now the bug does not appear. Perhaps this is due to the fact that I set all the parameters before installing Arch, or it was fixed.
Comment 10 Martin Peres 2019-11-19 09:08:13 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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