Public bug reported:
Binary package hint: xorg
Description: Ubuntu 8.10
Release: 8.10
In Ubuntu 8.04 I had dual head working perfectly with the following graphics
card (output from lspci):
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400/G450
(rev 85)
After the upgrade to 8.10 I get the following error when trying to start X:
(EE) MGA(0): Unable to map BAR 0. Invalid argument (22)
The x server detects the device as 'Chipset: "mgag400" (G450)'
The relevant sections from xorg.conf:
Section "Device"
Identifier "Matrox Graphics, Inc. MGA G400/G450 (Head 0)"
Driver "mga"
BusID "PCI:1:0:0"
Screen 0
VideoRam 16384
EndSection
Section "Device"
Identifier "Matrox Graphics, Inc. MGA G400/G450 (Head 1)"
Driver "mga"
BusID "PCI:1:0:0"
Screen 1
VideoRam 16384
EndSection
[...Monitor and Screen definitions...]
Section "ServerLayout"
Identifier "Default Layout"
Screen "Primary Screen (Head 0)"
Screen "Primary Screen (Head 1)" Rightof "Primary Screen (Head
0)"
EndSection
If I remove the second screen line, the server starts fine but with
identical display on both heads.
Version information:
xserver-xorg-video-mga:
Installed: 1:1.4.9.dfsg-1build1
Candidate: 1:1.4.9.dfsg-1build1
Version table:
*** 1:1.4.9.dfsg-1build1 0
500 http://de.archive.ubuntu.com intrepid/main Packages
100 /var/lib/dpkg/status
Unfortunately, the mga driver doesn't support multi head output via
xrandr, so using that isn't an option for me.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
--
dual head support broken in mga driver
https://bugs.launchpad.net/bugs/294355
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