[Openchrome-devel] [PATCH] Fix new modesetting on P4M890

[Xavier Bachelot]

Rafa? Mi?ecki wrote:
> This is fix for bug #309: http://www.openchrome.org/trac/ticket/309
> which is regression after RandR branch merge.
> 
> I compared all registers operations between legacy code and new code
> and found important difference. Posted patch copies lacking register
> operation from legacy to new modesetting code.
> 
> It fixes mode switching on my P4M890: I made a lot of xrandr
> resolutions switches without problem. However I have no idea if this
> won't cause any problems on other chipsets. For me it looks pretty
> safe, even more as it was used for quite a long time in pre-merge
> code.
> 
Fwiw, I don't have any issue switching resolution on a VX800. iirc,
Bartosz also tested, and has no issue on a K8M890. Looks like only
P4M890 is affected so may be it should be wrapped in a chipset test. I
have yet to test if it the patch has any side effect on the VX800 though.

Regards,
Xavier