From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
Subject: [Bug 35901] New: two full hd displays (left and right)
with nouveau does not work any more
Date: Sat, 2 Apr 2011 02:25:32 -0700 (PDT)
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https://bugs.freedesktop.org/show_bug.cgi?id=35901
Summary: two full hd displays (left and right) with nouveau
does not work any more
Product: xorg
Version: 7.4
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/nouveau
AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
ReportedBy: grafgrimm77-Mmb7MZpHnFY@public.gmane.org
QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
the "old" combination works fine:
x11-drivers/xf86-video-nouveau-0.0.16_pre2010101
x11-base/xorg-server-1.9.5
x11-libs/libdrm-2.4.22
media-libs/mesa-7.9
with the following settings:
Section "Screen"
Identifier "Screen-two"
Device "nouveau-two"
Monitor "DVI-D-1"
Monitor "VGA-1"
DefaultDepth 24
Subsection "Display"
Depth 24
Virtual 3840 1080
EndSubsection
EndSection
and the following commands:
xrandr --output VGA-1 --mode 1920x1080
xrandr --output DVI-D-1 --mode 1920x1080
xrandr --output DVI-D-1 --primar
xrandr --output VGA-1 --left-of DVI-D-1
the new (perhaps not the newest) combination cause problems:
x11-drivers/xf86-video-nouveau-0.0.16_pre20101130
x11-base/xorg-server-1.9.5
x11-base/xorg-drivers-1.9
media-libs/mesa-7.10.1
x11-libs/libdrm-2.4.23
I figured out that using both displays one above the other works:
xrandr --output DVI-D-1 --below VGA-1.
the final resolution is: 1920 * 2160
The only problem is a completly wrong auto-dpi-setting.
But my favorite layout (booth displays beside each other does not work):
xrandr --output DVI-D-1 --right-of VGA-1
here the final resolution is: 3840 * 1080
"does not work" means: i see a mouse courser which a can move around booth
displays, but the picture has errors (vertical stripes) and the desktop is not
usable at all (no text, no icons). I used kde4 and xfce4 for testing.
When I use 1280*1024 on the left screen, "xrandr --output DVI-D-1 --below
VGA-1." works fine. so the final resolution is 3200 * 1080
So why 3840 * 1080 is too much? The maximum should be 4096 * 4096 as
xrandr --query
tells me:
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 4096 x 4096
VGA-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm
x 268mm
1920x1080 60.0*+
DVI-D-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis)
531mm x 299mm
1920x1080 60.0*+
This output was made with the old working combination.
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