Re: persistant problems with drm + mga

[David M. <es...@ti...>]

On Tuesday 03 Jan 2006 18:02, Ian Romanick wrote:
> David Mulcahy wrote:
> > I have been experiencing problems getting drm to work again with my
> > matrox g4oo card.  The problem started around this post.
> >
> > http://sourceforge.net/mailarchive/forum.php?thread_id=8163981&forum_id=7
> >177
> >
> > Now although That particular problem has stopped I still cannot get drm
> > working again.  I have a current kernel 2.6.14 and a new xorg "X Protocol
> > Version 11, Revision 0, Release 6.9" but still no drm.
> >
> > This appears in the xlog
> >
> > (**) Option "dpms"
> > (**) MGA(0): DPMS enabled
> > (II) MGA(0): Using overlay video
> > (II) MGA(0): X context handle = 0x1
> > (II) MGA(0): [drm] installed DRM signal handler
> > (II) MGA(0): [DRI] installation complete
> > (EE) MGA(0): [drm] Failed to map DMA buffers list
> > (II) MGA(0): [drm] removed 1 reserved context for kernel
> > (II) MGA(0): [drm] unmapping 8192 bytes of SAREA 0xe0a27000 at 0xb6192000
> > (WW) MGA(0): Direct rendering disabled
> > (==) RandR enabled
>
> There were some issues with the AGP interaction in the MGA DRM
> introduced last August.  I believe that I fixed them around the
> beginning of November.  I'm not sure if all of those changes found their
> way into 2.6.14.  Is there anything "interesting" in /var/log/messages?
>
> See also: https://bugs.freedesktop.org/show_bug.cgi?id=4797
>
> There are two things that you could try.  First, try updating your DRM
> to current CVS.  Second, try adding 'Option "OldDmaInit" "true"' to the
> card's device section in your xorg.conf.
Right after upgrading to kernel 2.6.15-rc5 things are getting better.

This is with  'Option "OldDmaInit" "true"' in my xconf file.

(**) MGA(0): DPMS enabled
(II) MGA(0): Using overlay video
(II) MGA(0): X context handle = 0x1
(II) MGA(0): [drm] installed DRM signal handler
(II) MGA(0): [DRI] installation complete
(II) MGA(0): [drm] Mapped 128 DMA buffers
(II) MGA(0): [drm] dma control initialized, using IRQ 7
(II) MGA(0): Direct rendering enabled

and this is from glxgears
1210 frames in 5.0 seconds = 241.964 FPS
1206 frames in 5.0 seconds = 241.097 FPS
1206 frames in 5.0 seconds = 241.014 FPS
1207 frames in 5.0 seconds = 241.209 FPS
1207 frames in 5.0 seconds = 241.253 FPS
1206 frames in 5.0 seconds = 241.181 FPS

However the cogs turning when glxgears are running are VERY slow a lot slower 
than I am used to and the 241FPS is slightly down on 311FPs that I used to 
get (but why are the cogs moving so slowly as if direct rendering is turned 
off).

Remove  'Option "OldDmaInit" "true"' and drm is disabled again.

Dave