Bug 109238

Summary: [DC] Polaris10: Missing modes when enabling DC
Product: DRI Reporter: Raman Gupta <rocketraman>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: alex3kov, cousinmarc, dri-devel, fdsfgs, freedesktop-bugzilla, harry.wentland, johan.gardhage, nicholas.kazlauskas
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Bug Depends on: 103953    
Bug Blocks:    
Attachments:
Description Flags
Xorg.0.log with modesetting
none
Xorg.0.log without modesetting
none
dmesg with modesetting
none
dmesg without modesetting none

Description Raman Gupta 2019-01-07 06:44:55 UTC 
Created attachment 142991 [details]
Xorg.0.log with modesetting

+++ This bug was initially created as a clone of Bug #103953 +++

I have 3 Dell WQHD Screens (2560x1440) screens, connected to a Radeon RX580 (XFX, RX-580 GTS Black Edition, 1425 MHz 8GB).

My kernel is:

Linux edison 4.19.13-300.fc29.x86_64 #1 SMP Sat Dec 29 22:54:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

With the default boot settings, which enable amdgpu.dc, I am unable to get the native resolution on one of the three monitors.

If I disable amdgpu.dc on the kernel command line, I am able to get the native resolution on all three monitors.

I have attached the Xorg.0.conf.old from the startup with amdgpu.dc at the default setting, and Xorg.0.conf from the startup with amdgpu.dc=0.

I have also attached the initial part of the dmesg log from both boots:

dmesg-amdgpudcdefault.log : default amdgpu.dc setting (enabled)
dmesg-amdgpudc0.log : amdgpu.dc=0

The only relevant difference I see between the two is that with modesetting, I see the following errors:

 edison kernel: amdgpu: [powerplay] Failed to retrieve minimum clocks.
 edison kernel: amdgpu: [powerplay] Error in phm_get_clock_info 

whereas without modesetting I do not see those errors.
Comment 1 Raman Gupta 2019-01-07 06:45:29 UTC 
Created attachment 142992 [details]
Xorg.0.log without modesetting
Comment 2 Raman Gupta 2019-01-07 06:45:53 UTC 
Created attachment 142993 [details]
dmesg with modesetting
Comment 3 Raman Gupta 2019-01-07 06:46:11 UTC 
Created attachment 142994 [details]
dmesg without modesetting
Comment 4 Raman Gupta 2019-07-12 21:17:07 UTC 
Still have this issue, with a totally different card: RX590 made by Asus.
Comment 5 Martin Peres 2019-11-19 09:09:21 UTC 
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