second monitor attached to second gpu fails to start

[Sergey Schwartz]

Gents,

I've got a dual gpu(amd r7 250x) rig with 4 monitors attached to the first one and 2 monitors attached to the second gpu. All monitors have the same resolution 1920x1080. I've installed Kubuntu 14.10 beta2 and have 5 of the monitors working just fine under single Screen0, so I can drag windows across monitors. All monitors were identified correctly by xrandr, but for some reason the 6th monitor fails to start.

I can see an error message in /var/log/Xorg.0.log

[ 295.327] Cannot do multiple crtcs without X server dirty tracking 2 interface
[ 295.327] (EE) RADEON(G0): failed to set mode: No space left on device(II) RADEON(0): EDID vendor "ACI", prod id 10228

Please check attached xrandr.out, lspci.out and Xorg.0.log.

Cheers,
Sergey

[Sergey Schwartz (svschwartz)]

Xorg.0.log

[Sergey Schwartz (svschwartz)]

lspci

[penalvch (penalvch)]

Sergey Schwartz, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect -p xorg 1381013

Please ensure you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information.

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]