https://bugzilla.novell.com/show_bug.cgi?id=370656
Summary: Only clone mode available when using 2x DVI-D (radeonhd)
Product: openSUSE 11.0
Version: Alpha 2plus
Platform: Other
OS/Version: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: X.Org
AssignedTo: mhopf@novell.com
ReportedBy: sndirsch@novell.com
QAContact: xorg-maintainer-bugs@forge.provo.novell.com
Found By: ---
Date: Thu, 13 Mar 2008 18:55:44 +0100
From: Matthias Hopf
To: xorg@lists.freedesktop.org
Subject: RandR: multi-referenced monitor sections & problems with them
I just stumbled over some strange behavior, and it definitely changed
past Xserver 1.4.0 (don't know the exact version yet, bisecting this
would be probably worth it).
A snippet of the config I'm testing is
Section "Monitor"
Identifier "M1"
EndSection
Section "Monitor"
Identifier "M2"
Option "Right-Of" "M1"
EndSection
Section "Device"
Identifier "D"
Driver "radeonhd"
Option "monitor-DVI-I_1/digital" "M1"
Option "monitor-DVI-I_2/digital" "M2"
EndSection
Section "Screen"
[...]
Identifier "S"
Device "D"
Monitor "M1"
EndSection
[...]
So basically a static multi-monitor setup for RandR 1.2, with one of the
monitors additionally referenced in the Screen section. This monitor
reference shouldn't be used at all, because the driver sets
use_screen_monitor to FALSE for all outputs.
This used to work - however, beginning with 1.4.90 the multi-monitor
setup fails if and only if I use the two digital DVI outputs on this
card, with DVI and VGA it works fine, with DVI/d and DVI/a it also works
fine. If I remove the reference to the M1 monitor in the Screen section
it works fine. If I add another monitor and reference it in the Screen
section instead it works fine. It's probably difficult to reproduce this
with another driver, but this shouldn't be a driver issue.
Does anybody have a clue WTF is going on here, is this considered
standard behavior or rather a bug? If it's standard, why is its behavior
depending on the outputs (and not on the monitors)?
Thanks
Matthias
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