Matrox G550 dual head crashes 1.5.2 server

[Stefan Dirsch]

On Wed, Apr 15, 2009 at 08:13:19PM +0200, Tilman Sauerbeck wrote:
> Stefan Dirsch [2009-04-15 11:28]:
> 
> HI,
> 
> > On Wed, Apr 15, 2009 at 10:14:12AM +0200, Dieter und Sigrid Henskes wrote:
> > > I run a Matrox G550 card in dual head mode. This worked fine under Xorg 7.2 ( 
> > > Linux Kernel 2.6.22.5-3 in SUSE 10.3 ). But this crashes the Server 1.5.2 
> > > under Xorg 7.4 in SUSE 11.1 ( Linux Kernel 2.6.27.7-9 ). 
> > 
> > In case you use MergedFB, I've reported this
> > 
> >   https://bugs.freedesktop.org/show_bug.cgi?id=21022
> > 
> > It would be appreciated if Tilman and/or Ian could shed some light on
> > this.
> 
> The use of mga_hal isn't supported by xf86-video-mga - it hasn't worked
> in ages.

It did for me until commit 074a4aa1985219910a96b022368067e3ed5641e6. I
bisected it. Apparently I need to debug and fix the issue
myself. Would have been much more easier for one, who knows the code
by heart.

> The randr-1.2 branch of xf86-video-mga.git supports most of the
> modesetting features that mga_hal offered, btw, though it's not finished
> as you probably know :|

Unfortunately a typical RANDR 1.2 setup (side-by-side) never worked
for me on G550 when using this driver branch. There hasn't been a
single commit since Fri Jan 18 2008. My impression was you gave up on
implementing RANDR 1.2 in mga.

Classical Xinerama setup (without MergedFB) with mga driver is also
broken.

  https://bugzilla.novell.com/show_bug.cgi?id=441070
  https://bugzilla.novell.com/show_bug.cgi?id=210988

So what's the recommendation to a Matrox user, who wants to use both
outputs? Replace graphics card?

Best regards,
Stefan

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