[Bug 41235] ServerLayout section causes both outputs to be disabled in 2-card 4-head setup.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=41235

--- Comment #5 from abortretryfail at gmail.com 2011-09-26 09:46:18 PDT ---
I have 2 radeon cards (HD5680 and HD2600) set up in a 4-head configuration. If
DVI-1 on the HD2600 is Above DVI-2 in the ServerLayout section, xorg errors out
and disables both outputs on the HD2600 and logs the following in dmesg:

[22676.145643] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
[22676.557971] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id

When I change DVI-2 to Above DVI-1, it works as expected. I've worked around
this issue by swapping the displays on the physical connectors, but this may be
a problem for someone else where that's not an option (ie, HDMI and VGA or
something...)

See attached log and configuration files for details. 

-Alex

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