On Sun, May 04, 2003 at 05:48:53PM -0700, Linus Torvalds wrote:
>  I finally found the reason for why some of my machines had trouble with
> restarting the X server, and it turns out that it's been around since very
> early February. I bet others must have seen it too, with random crashes on
> X server restart when the server used AGP (which means that it mainly hit
> either hw-accelerated 3D setups or the intel integrated graphics which use
> a UMA model with AGP as the backing store).
> 
> That's a big relief for me, as it was the major thing I personally worried 
> about for 2.6.x. 

Unfortunately it is not the same reason that locks up my machine ;(

On SIS 735 motherboard, with agpgart, sis-agp and radeon loaded, I get
this on the serial console before the machine freezes:
   agpgart: Found an AGP 2.0 compliant device.
   agpgart: Putting AGP V2 device at 00:00.0 into 4x mode
   agpgart: Putting AGP V2 device at 01:00.0 into 4x mode
Without these modules loaded, the machine is stable.

I am using XFree86 4.3.0 with a Radeon 8500.

Please let me know if you need more details or you have a patch for
testing.

Cheers,
florin

-- 

"NT is to UNIX what a doughnut is to a particle accelerator."