Hi,
I'm the proud owner of two NEC MultiSync 2070WNX monitors (1680x1050) and a
Matrox G550 dual DVI card. I'm now trying to set up a dual head configuration
with this equipment.
I'm booting with video=matroxfb:vesa:0x1BB, as there is no 1680x1050 vesa
mode. This works, both monitors show the same and complain about the wrong
resolution.
Now I start my X server (xorg.conf below) and wish to get a xinerama setup.
Monitor 1 switches to 1680x1050 and shows a nice clean screen. Monitor 2
seems to have problems, though. I guess the card still outputs the 1280x1024
set up at boot time. Colours are correct, but the image is heavily distorted.
It looks like the X server thinks it's 1680x1050 but in fact it's still
1280x1024.
I spent some time googling, but to no avail. Now my questions:
Is this a known limitation of matroxfb?
If yes, is it considered a bug? I could spend some time looking into the code.
Do I have any chance to get this working in a reasonable dual head
configuration? Any hints?
TIA,
Hans
Here's my xorg.conf:
# /etc/X11/xorg.conf (xorg X Window System server configuration file)
Section "Files"
FontPath "unix/:7100" # local font server
FontPath "unix/:7101" # local ttf-font server
# path to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection
Section "Module"
Load "i2c"
Load "bitmap"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
Load "vbe"
EndSection
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "de"
Option "XkbVariant" "nodeadkeys"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ExplorerPS/2"
Option "Emulate3Buttons" "true"
EndSection
Section "Device"
Identifier "MatroxG550_1"
Driver "mga"
BusID "PCI:1:0:0"
Option "OldDmaInit" "True"
Screen 0
EndSection
Section "Device"
Identifier "MatroxG550_2"
Driver "mga"
BusID "PCI:1:0:0"
Option "OldDmaInit" "True"
Screen 1
EndSection
Section "Monitor"
Identifier "NECMonitor1"
Option "DPMS"
HorizSync 32-82
VertRefresh 56-75
Modeline "1680x1050@60" 154.20 1680 1712 2296 2328 1050 1071 1081 1103
EndSection
Section "Monitor"
Identifier "NECMonitor2"
Option "DPMS"
HorizSync 32-82
VertRefresh 56-75
Modeline "1680x1050@60" 154.20 1680 1712 2296 2328 1050 1071 1081 1103
EndSection
Section "Screen"
Identifier "LeftScreen"
Device "MatroxG550_1"
Monitor "NECMonitor1"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1680x1050" "1280x1024"
EndSubSection
EndSection
Section "Screen"
Identifier "RightScreen"
Device "MatroxG550_2"
Monitor "NECMonitor2"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1680x1050" "1280x1024"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "LeftScreen" 0 0
Screen 1 "RightScreen" RightOf "LeftScreen"
Option "Xinerama" "On"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection
Section "DRI"
Mode 0666
EndSection
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From: Alex Deucher <hidden> Date: 2007-03-01 23:29:53
On 3/1/07, Hans-Jürgen Koch [off-list ref] wrote:
Hi,
I'm the proud owner of two NEC MultiSync 2070WNX monitors (1680x1050) and a
Matrox G550 dual DVI card. I'm now trying to set up a dual head configuration
with this equipment.
I'm booting with video=matroxfb:vesa:0x1BB, as there is no 1680x1050 vesa
mode. This works, both monitors show the same and complain about the wrong
resolution.
Now I start my X server (xorg.conf below) and wish to get a xinerama setup.
Monitor 1 switches to 1680x1050 and shows a nice clean screen. Monitor 2
seems to have problems, though. I guess the card still outputs the 1280x1024
set up at boot time. Colours are correct, but the image is heavily distorted.
It looks like the X server thinks it's 1680x1050 but in fact it's still
1280x1024.
I spent some time googling, but to no avail. Now my questions:
Is this a known limitation of matroxfb?
If yes, is it considered a bug? I could spend some time looking into the code.
Do I have any chance to get this working in a reasonable dual head
configuration? Any hints?
IIRC, the current mga X server doesn't know how to deal with DVI
(single or dual ports). DVI was only supported with matrox' binary
module.
Alex
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Am Freitag, 2. März 2007 00:29 schrieb Alex Deucher:
On 3/1/07, Hans-Jürgen Koch [off-list ref] wrote:
quoted
Hi,
I'm the proud owner of two NEC MultiSync 2070WNX monitors (1680x1050) and
a Matrox G550 dual DVI card. I'm now trying to set up a dual head
configuration with this equipment.
I'm booting with video=matroxfb:vesa:0x1BB, as there is no 1680x1050 vesa
mode. This works, both monitors show the same and complain about the
wrong resolution.
Now I start my X server (xorg.conf below) and wish to get a xinerama
setup. Monitor 1 switches to 1680x1050 and shows a nice clean screen.
Monitor 2 seems to have problems, though. I guess the card still outputs
the 1280x1024 set up at boot time. Colours are correct, but the image is
heavily distorted. It looks like the X server thinks it's 1680x1050 but
in fact it's still 1280x1024.
I spent some time googling, but to no avail. Now my questions:
Is this a known limitation of matroxfb?
If yes, is it considered a bug? I could spend some time looking into the
code. Do I have any chance to get this working in a reasonable dual head
configuration? Any hints?
IIRC, the current mga X server doesn't know how to deal with DVI
(single or dual ports). DVI was only supported with matrox' binary
module.
Hi Alex,
thanks for your fast reply.
Currently, I've got both monitors connected with VGA cables. The card has some
proprietary 60-pin or so connector, and I've got an adapter caple from that
plug to 2xVGA. Both monitors show a stable picture, but only the picture on
monitor #1 is usable. It really looks like the X server is trying to switch
both channels to 1680x1050, but only succeeds with the first one.
Hans
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Am Freitag, 2. März 2007 00:49 schrieb Hans-Jürgen Koch:
Am Freitag, 2. März 2007 00:29 schrieb Alex Deucher:
quoted
On 3/1/07, Hans-Jürgen Koch [off-list ref] wrote:
quoted
Hi,
I'm the proud owner of two NEC MultiSync 2070WNX monitors (1680x1050)
and a Matrox G550 dual DVI card. I'm now trying to set up a dual head
configuration with this equipment.
I'm booting with video=matroxfb:vesa:0x1BB, as there is no 1680x1050
vesa mode. This works, both monitors show the same and complain about
the wrong resolution.
Now I start my X server (xorg.conf below) and wish to get a xinerama
setup. Monitor 1 switches to 1680x1050 and shows a nice clean screen.
Monitor 2 seems to have problems, though. I guess the card still
outputs the 1280x1024 set up at boot time. Colours are correct, but the
image is heavily distorted. It looks like the X server thinks it's
1680x1050 but in fact it's still 1280x1024.
I spent some time googling, but to no avail. Now my questions:
Is this a known limitation of matroxfb?
If yes, is it considered a bug? I could spend some time looking into
the code. Do I have any chance to get this working in a reasonable dual
head configuration? Any hints?
IIRC, the current mga X server doesn't know how to deal with DVI
(single or dual ports). DVI was only supported with matrox' binary
module.
Hi Alex,
thanks for your fast reply.
Currently, I've got both monitors connected with VGA cables. The card has
some proprietary 60-pin or so connector, and I've got an adapter caple from
that plug to 2xVGA. Both monitors show a stable picture, but only the
picture on monitor #1 is usable. It really looks like the X server is
trying to switch both channels to 1680x1050, but only succeeds with the
first one.
Hans
BTW, even xinerama "works": I can move the mouse cursor to the second monitor
and it appears there, but also heavily distorted.
Hans
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From: Alex Deucher <hidden> Date: 2007-03-02 01:49:57
On 3/1/07, Hans-Jürgen Koch [off-list ref] wrote:
Am Freitag, 2. März 2007 00:29 schrieb Alex Deucher:
quoted
On 3/1/07, Hans-Jürgen Koch [off-list ref] wrote:
quoted
Hi,
I'm the proud owner of two NEC MultiSync 2070WNX monitors (1680x1050) and
a Matrox G550 dual DVI card. I'm now trying to set up a dual head
configuration with this equipment.
I'm booting with video=matroxfb:vesa:0x1BB, as there is no 1680x1050 vesa
mode. This works, both monitors show the same and complain about the
wrong resolution.
Now I start my X server (xorg.conf below) and wish to get a xinerama
setup. Monitor 1 switches to 1680x1050 and shows a nice clean screen.
Monitor 2 seems to have problems, though. I guess the card still outputs
the 1280x1024 set up at boot time. Colours are correct, but the image is
heavily distorted. It looks like the X server thinks it's 1680x1050 but
in fact it's still 1280x1024.
I spent some time googling, but to no avail. Now my questions:
Is this a known limitation of matroxfb?
If yes, is it considered a bug? I could spend some time looking into the
code. Do I have any chance to get this working in a reasonable dual head
configuration? Any hints?
IIRC, the current mga X server doesn't know how to deal with DVI
(single or dual ports). DVI was only supported with matrox' binary
module.
Hi Alex,
thanks for your fast reply.
Currently, I've got both monitors connected with VGA cables. The card has some
proprietary 60-pin or so connector, and I've got an adapter caple from that
plug to 2xVGA. Both monitors show a stable picture, but only the picture on
monitor #1 is usable. It really looks like the X server is trying to switch
both channels to 1680x1050, but only succeeds with the first one.
you should probably ask on the xorg mailing list :)
Dualhead is a bit flakey in the xorg driver at the moment, although
work is being done to fix that. IIRC, the ordering is wrong when
programming one of the PLLs.
Alex
Hans
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