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[Daniel Bünzli <daniel.buenzli@xxxxxxxxxxxx>]

Adapting Andromalius solution with a simple xorg.conf with

Section "Device"
        Identifier "Matrox Graphics, Inc. MGA G200eR2"
        Driver "vesa"
        Option "OldDmaInit" "True"
EndSection

Brings back a usable system UI-wise on the T320. The graphics card is
still unclaimed though:

sudo lshw -C display
  *-display UNCLAIMED     
       description: VGA compatible controller
       product: G200eR2
       vendor: Matrox Electronics Systems Ltd.
       physical id: 0
       bus info: pci@0000:06:00.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm vga_controller bus_master cap_list
       configuration: latency=64 maxlatency=32 mingnt=16
       resources: memory:d8000000-d8ffffff memory:de7fc000-de7fffff memory:dd800000-ddffffff

-- 
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Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1316035

Title:
  matrox g200eR2 is unclaimed in 14.04

Status in “xorg-server” package in Ubuntu:
  Confirmed

Bug description:
  On a certified Dell PowerEdge T620 server
  (http://www.ubuntu.com/certification/hardware/201207-11426/)

  The matrox video card is not recognised:
  lspci | grep VGA
  0a:00.0 VGA compatible controller: Matrox Electronics Systems Ltd. G200eR2

  lshw -C display
    *-display UNCLAIMED     
         description: VGA compatible controller
         product: G200eR2
         vendor: Matrox Electronics Systems Ltd.
         physical id: 0
         bus info: pci@0000:0a:00.0
         version: 00
         width: 32 bits
         clock: 33MHz
         capabilities: pm vga_controller bus_master cap_list
         configuration: latency=64 maxlatency=32 mingnt=16
         resources: memory:d8000000-d8ffffff memory:deffc000-deffffff memory:de000000-de7fffff

  Thus xserver is not hardver accelerated.

  Also /dev/dri and /dev/dri/card0 is missing.

  kernel module mga is not loaded, although if i manually load by modprobe it works fine
  modprobe mga
  lsmod | grep mga
  mga                    40811  0 
  drm                   302817  1 mga

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