https://bugs.freedesktop.org/show_bug.cgi?id=52330
--- Comment #9 from Mickaël Perrin <[email protected]> --- I get the same problem as the submitter. Try to run a 3 monitors desktop, but unable to get the 3 monitors working at the same time when using my central monitor at his native 4k resolution. Tried a lot of things as adviced in the comment thread. I am currently running : - Xubuntu 15.04 - Xorg edgers PPA - Self compiled master branch radeon driver - Xorg.conf options : Option "AccelMethod" "glamor" / Option "ShadowPrimary" / Option "TearFree" Depending on the driver version used and the xorg-edgers PPA update or not, I can get : - my central monitor working at 4k while the two others displays scratched fixed image - my two side monitor working while the central 4k monitor displays a fixed image Some ressources : - photo of the "scratched images" : http://bit.ly/1SSDPtx - my latest xorg.conf : http://paste.ubuntu.com/12012614/ - my latest Xorg.0.log : http://paste.ubuntu.com/12012625/ - result of dmesg | grep 'radeon\|drm' : http://paste.ubuntu.com/12012626/ - result of xrandr --verbose : http://paste.ubuntu.com/12012645/ - no errors in /var/log/syslog when running xrandr - more detailed explanations of what I tried on askubuntu : http://bit.ly/1SSE4F0 Note that : - it works on windows, - it works sloooowly with amd binary drivers - with xorg edgers ppa and git version of ati driver, I can't get the two side monitors to work even when decreasing the resolution of the central monitor to 2560x1440. -- You are receiving this mail because: You are the assignee for the bug.
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