Re: X on O2, this time for real

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On Mar 1, 2009, at 12:33 PM, Martin Husemann wrote:

> On Sun, Mar 01, 2009 at 12:22:57PM -0500, Michael wrote:
>> Hat's weird but I didn't pay any attention to the composite and  
>> damage
>> extensions at all - they slow the whole thing down considerably so I
>> have them disabled on most of my machines.
>
> Not realy a mystery - with DAMAGE and COMPOSITE enabled, the defaul  
> visual suddenly
> becomes ARGB and many, many applications and libraries just can not  
> handle
> that properly. We realy should disable them by default.

Umm, ARGB is exactly what (almost) everyone else uses. And that's why  
we DMA data in and out of the fb instead of copying by hand - so crime  
can convert ARGB to crime's native pixel format. Sure you didn't mean  
RGBA? That would indeed screw with many applications.

> I have it disabled everywhere because it breaks at least imlib and the
> nv driver on my notebook (maybe actually everything that uses XAA  
> while
> EXA seems to have been fixed).

If you enable them in a C&T 65550 the damn thing gets as slow as all- 
software. On a Creator3D you still see a significant speed hit and all  
sorts of artifacts. Since I don't care about transparent windows and  
other eyecandy that was enough for me to disable them everywhere else.

have fun
Michael

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