Bug 97249

Summary: R290x combined with Mg279q, Dp link fail in ubuntu-multihead setup.
Product: DRI Reporter: ramsland <ramsland>
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: vedran
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
glxinfo
none
Error msg in dmsg at startup.
none
dmsg error when using xrandr to set resolution higher than 1080p.
none
glx info from fedora 24 live.
none
Xorg-log none

Description ramsland@hotmail.com 2016-08-08 21:40:04 UTC 
Epuigpment: CPU Amd fx8350, Mboard: Gigabyte GA-990FXA-UD3, Ram 16 gb. Sapphire R9 290x. 
Monitor setup:  2 monitors, 1 right side (DP-0) Asus MG279q, 1 left(HDMI-0)pb279. Both are 1440p monitors, with the Mq279q have high refreshrate 144hz.
Using randr for multihead.

OS: Ubuntu 16.04, kernel 4.4.0-31-generic
PPA:Obiaf.

Problem: The right screen is blank, as long as I try to use standard resolution, meaning 1440p. Can only get it to work in 1080p, at 60hz. It worked perfectly in the old fgrlx when running ubuntu 14.4, and with radeon in ubuntu 14.4, though it might have been both screens at 60hz with the radeon driver. 
When trying with livecd's, the fedora 24 is working at 1440p at 60 hz, but fails if i try to increase the refresh rate. 
Ubuntu live 16.04, fails the same way as my install.

I think its releated to the radeon driver, but i cant be sure.
Comment 1 ramsland@hotmail.com 2016-08-08 21:41:30 UTC 
Created attachment 125612 [details]
glxinfo
Comment 2 ramsland@hotmail.com 2016-08-08 21:54:14 UTC 
Created attachment 125613 [details]
Error msg in dmsg at startup.
Comment 3 ramsland@hotmail.com 2016-08-08 21:55:11 UTC 
Created attachment 125614 [details]
dmsg error when using xrandr to set resolution higher than 1080p.
Comment 4 ramsland@hotmail.com 2016-08-08 21:59:54 UTC 
Created attachment 125621 [details]
glx info from fedora 24 live.
Comment 5 ramsland@hotmail.com 2016-08-08 22:06:38 UTC 
Created attachment 125622 [details]
Xorg-log
Comment 6 Vedran Miletić 2016-08-29 12:45:15 UTC 
Can you try a newer kernel? 4.7 at least.
Comment 7 ramsland@hotmail.com 2016-09-03 20:16:49 UTC 
Tried with kernel 4.7.2. The problem continues. 

I have switched around, and the HDMI works with the screen, though only 60hz. 
The screen is on at post, but dissapears during ubuntu startup, after grub the screen remains dark. 


DRM 2.45.0 / 4.7.2-040702-generic, LLVM 4.0.0


kind regards B.
Comment 8 Martin Peres 2019-11-19 09:18:04 UTC 
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