https://bugs.freedesktop.org/show_bug.cgi?id=40915
Summary: Unable to use 2 x dual head radeon cards in the same
PC
Product: xorg
Version: unspecified
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
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.
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