Hi all, We are currently trying to use a PC with 2 x Radeon cards on Debian Squeeze using a backports 2.6.39 kernel to drive 3 large display monitors in our support centre. Unfortunately we are currently unable to drive both cards at the same time using two different X server processes. As discussed previously on the xorg mailing list (see http://lists.freedesktop.org/archives/xorg/2011-August/053467.html), this appears to be a radeon driver-specific issue since if we switch one of the monitors over to the internal Intel graphics card then all is well. Attached to this bug report are the outputs from launching both X servers and other information I hope will be useful in order to help someone find the issue. Currently the two X sessions are launched in separate terminals like this: X :0 -isolateDevice 'PCI:1:0:0' -config /root/debug/xorg.2.conf X :1 -isolateDevice 'PCI:2:0:0' -config /root/debug/xorg.1.conf When both are launched together, only the 'PCI:1:0:0' display appears to be enabled - the second 'PCI:2:0:0' currently remains off in power-save mode. Many thanks, Mark.
Created attachment 51233 [details] output of lspci on PC
Created attachment 51234 [details] xorg.1.conf file
Created attachment 51235 [details] xorg.2.conf file
Created attachment 51236 [details] output from xorg.1.conf terminal
Created attachment 51237 [details] output from xorg.2.conf terminal
Can you get both working with a single X server? Also, please attach your dmesg output.
(In reply to comment #6) > Can you get both working with a single X server? Also, please attach your > dmesg output. Hi Alex, dmesg output for the time in question attached (note I've been relaunching it multiple times for testing so you likely get 1 of the error lines per launch). From my previous attempts I was unable to get both working on the same X config, but then again I was struggling to work out how to get all 3 screens in a single configuration. If you point me in the right direction from the two individual files above, I can try again but it will have to wait until tomorrow now. ATB, Mark.
Created attachment 51238 [details] dmesg output
Hi Alex, Also for your information: I have now setup a build environment on the server and have successfully built the latest git head of xf86-video-ati. Therefore if you need me to try again with some custom debugging patches, I can apply them and report back. ATB, Mark.
Mass closure: This bug has been untouched for more than six years, and is not obviously still valid. Please reopen this bug or file a new report if you continue to experience issues with current releases.
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