[Hardy] No direct rendering by MGA G400/G450 (rev 82)

[Jarno Suni]

$ glxinfo | grep rendering
direct rendering: No (If you want to find out why, try setting LIBGL_DEBUG=verbose)
$ lspci | grep Graphics
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400/G450 (rev 82)

[Jarno Suni (jarnos)]

I am using updated Xubuntu Hardy Beta

[Jarno Suni (jarnos)]

There is horizontal flicker in both monitors, as if there are densely horizontal highlights. Additionally, there is one darker horizontal line moving slowly from bottom to top in the main monitor, and one moving from top to bottom in the secondary monitor. Secondary monitor has worse flickering. I think at least the main screen was better with Dapper, also direct rendering was shown glxinfo, but xorg.conf was different, I guess.

[Jarno Suni (jarnos)]

$ glxinfo
...
direct rendering: Yes
...

when using the automatically detected xorg.conf of clean install. I guess the video mode then is "1024x768@85" and there is no higher resolution available in display settings of Xubuntu even though the hardware would be capable of higher resolution. I don't see the flickering in the main screen now. On the other hand, the second screen looks even more horrifying with this setting. (I used displayconfig-gtk first to get draft for doing the xorg.conf given in the first comment.)

[Jarno Suni (jarnos)]

Now I get 1600x1200@75Hz by the same http://launchpadlibrarian.net/13930600/xorg.conf and still direct rendering works according to glxinfo. I can also change mode in Display settings of Xubuntu Hardy. This is for the primary head (that is located further away from the graphics card's AGP connectors. The other head is off after splash screen (which works perfectly) and I have no idea how to setup the second head. Command xrandr shows only one output. Should I report a separate bug about that?

[Bryce Harrington (bryce)]

Hi jarnos,

Thanks for including the attached files. Could you also include your /var/log/Xorg.0.log?

[Timo Aaltonen (tjaalton)]

You can't get DRI using multihead with mga.

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Hi REPORTER,

This bug was reported against an earlier version of Ubuntu, can you
test if it still occurs on Lucid?

Please note we also provide technical support for older versions of
Ubuntu, but not in the bug tracker. Instead, to raise the issue through
normal support channels, please see:

    http://www.ubuntu.com/support

If you are the original reporter and can still reproduce the issue on
Lucid, please run the following command to refresh the report:

  apport-collect BUGNUMBER

If you are not the original reporter, please file a new bug report, so
we can work with you as the original reporter instead (you can reference
bug BUGNUMBER in your report if you think it may be related):

  ubuntu-bug xorg

If by chance you can no longer reproduce the issue on Lucid or if you
feel it is no longer relevant, please mark the bug report 'Fix Released'
or 'Invalid' as appropriate, at the following URL:

  https://bugs.launchpad.net/ubuntu/+bug/BUGNUMBER

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Hi Jarno,

This bug was reported against an earlier version of Ubuntu, can you
test if it still occurs on Lucid?

Please note we also provide technical support for older versions of
Ubuntu, but not in the bug tracker. Instead, to raise the issue through
normal support channels, please see:

    http://www.ubuntu.com/support

If you are the original reporter and can still reproduce the issue on
Lucid, please run the following command to refresh the report:

  apport-collect 219515

If you are not the original reporter, please file a new bug report, so
we can work with you as the original reporter instead (you can reference
bug 219515 in your report if you think it may be related):

  ubuntu-bug xorg

If by chance you can no longer reproduce the issue on Lucid or if you
feel it is no longer relevant, please mark the bug report 'Fix Released'
or 'Invalid' as appropriate, at the following URL:

  https://bugs.launchpad.net/ubuntu/+bug/219515

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.