graphics on G4

[Justin Hibbits]

On Wed, Oct 22, 2008 at 05:01:01AM +1000, Peter Grehan wrote:
>  That sounds like a good place to start. For the case when the
> program mmap's the video, does it write to all the pages ? One
> thing to try would be to write a known value to screen memory
> e.g. 0xdeadcode, and on exit see if that triggers a panic
> rather than a hang.
> 
> later,
> 
> Peter.

At long last I've reproduced the hang.  I did write 0xdeadc0de to the
framebuffer memory, but no panic, just a hang.  At least, it seems to have been
just a hang, as there was no panic trace displayed, everything just stopped.

- Justin