Bug#465864: xserver-xorg-video-ati: xserver freezes the computer on startup

Alex Deucher alexdeucher at gmail.com
Wed Mar 5 16:58:38 PST 2008

On Wed, Mar 5, 2008 at 11:26 AM, Jiří Paleček <jpalecek at web.de> wrote:
> Hello,
>  sorry that I mystified you in the last email, it seems that I've done the
>  test with a different version if the driver (not 6.8.0). The correct
>  results are: 82 Hz works, 84 and 86 not.

The base problem here is that the pll algorithm is not able to find
clock as close as it would like to the desired frequency so it fails
and you end up with an invalid divders programmed to the hw which
causes the hang.  I guess there are two options: widen the error range
or try a slightly different clock if it fails to find valid dividers.


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