Re: Hard lockup switching to X from vc; Matrox G400 AGP

[Chris Rankin <rankinc@pacbell.net>]

Hi, thanks for confirming this. But if it's Matrox's code (we are
talking about the mga_hal_drv.o module for X, correct?) then the ball
is in their court. Has anyone reported this to them so that they can
fix it?

Cheers,
Chris
 
> On Mon, May 28, 2001 at 12:24:50AM +0200, Ben Twijnstra wrote:
> > Hi Chris,
> > 
> > Seen the same behaviour; you're not alone. I'm running XF86 4.0.3 with 
> > a G400. My guess is that mga_drv goes into some local loop while trying 
> > to restore the display. mga_drv at that moment has I/O privileges and if 
> > it hangs, Linux hangs too.
> 
> It is problem with their driver. Their are resetting too much of
> hardware state during mode switches and if someone accesses memory
> at that moment, whole thing locks up your PCI bus - if you have ATX
> box, try hitting poweroff button next time it lockups. If poweroff
> does not work you'll have bad time to get it debugged. If poweroff
> button works, you can try kdb...
> 
> On my machine it is 100% reproducible if I run 'fbtv -k' and start X.
> It will die immediately.