Bug 109017 - The drop in resolution with AMD Kaveri
Summary: The drop in resolution with AMD Kaveri
Status: RESOLVED MOVED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/AMDgpu (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-12-11 17:09 UTC by Dmitry
Modified: 2019-11-19 09:08 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Attachments
xorg log (36.53 KB, text/plain)
2018-12-11 17:39 UTC, Dmitry
no flags Details
dmesg log (80.66 KB, text/plain)
2018-12-11 17:44 UTC, Dmitry
no flags Details

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.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/646.


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