Bug#637511: i915 GPU Hang on First Login with Display Manager

[Jonathan Nieder <jrnieder@gmail.com>]

reassign 637511 src:linux-2.6 3.0.0-1
forwarded 637511 https://bugs.freedesktop.org/show_bug.cgi?id=40181 
quit

P. J. McDermott wrote:

> Investigation shows that the machine's Intel i915 GPU reproducibly hangs
> on the first display manager login attempt after boot, but so far never
> on subsequent attempts.  Oddly we never saw this on Debian Squeeze live
> CDs, so I wonder if this is a new bug in Linux.

>From Chris Wilson, upstream:

| Short story, don't even think of using the GPU on the 845G. There's a
| fundamental silicon bug that the workaround for has been lost in the mists of
| time and continues to cause misery for everyone unfortunate to encounter the
| 845G.

"Lost in the mists of time" means "Could be discovered by finding out
how it regressed and staring at the old code".  Because I don't
remember, I'll just ask: does the 845G use KMS in squeeze?

Thanks,
Jonathan