On Sun, 9 Jun 2002, Dirk [ISO-8859-1] St�ffler wrote:

> On my system, any one of the three options
> Option       "XaaNoOffscreenPixmaps"
> Option       "XaaNoPixmapCache"
> Option       "XaaNoScreenToScreenCopy"
> prevents the display from corrupting. By the way, it's REALLY difficult 
> to find three things if you're sure you're looking for only one. 
> Question to the experts: Which one costs least performance?

> Switching from 16bpp to 24bpp is said to cure the problem, too (Laurent 
> Montel <[EMAIL PROTECTED]> ). I couldn't really verify this, 
> because X doesn't let me have 1280x1024@85Hz in 24bpp depth, probably 
> due to some dacspeed default in the i810 driver. At 75Hz it works, 
> though. I didn't want to fiddle with this, but Intel says explicitly 
> that i810 supports these 85Hz-settings at this depth. Is there something 
> wrong with the defaults here?

Ah. I've always used 24bpp.

I've been using "DacSpeed 230" on my i815 for a couple of years.

> After having done all this work, I hope someone will be interested 
> enough to take up the case at this point.

Afraid I'm not yet interested.

-- 
Dr. Andrew C. Aitchison         Computer Officer, DPMMS, Cambridge
[EMAIL PROTECTED]   http://www.dpmms.cam.ac.uk/~werdna

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