r300 Xrandr slow rotation performance

[Michel Dänzer]

On Mon, 2010-01-18 at 13:22 +0100, zK wrote: 
> Michel Dänzer ha scritto:
> > On Sun, 2010-01-17 at 20:06 +0100, zK wrote: 
> >   
> >> I'm using Ubuntu karmic 9.10 with the open driver from the stable branch
> >> on a r300 ati x1250 .
> >>
> >> When using Xaa acceleration method i get a choppy screen after using
> >> xrandr to rotate the screen.
> >>     
> >
> > I wouldn't expect that to ever get fixed.
> >
> >   
> >> Using EXA acceleration resolves the problem but gives me some rendering
> >> corruption in Firefox.
> >>     
> >
> > What kind of corruption? Got a screenshot?
> >
> >
> >   
> There is no corruption in the screenshot after I took it, only when
> rendering live.
> I should take a picture with my camera but I don't have the time at the
> moment.

That could help clarify the nature of the problem.

> The are black lines going from one side to the other, sometimes just one
> line,other times one big block line.
> 
> Also when using the default ati driver shipped with Ubuntu karmic I had
> the same behaviour with a WHITE LINE ( I'm thinking with XAA
> acceleration since I didn't touch anything in xorg.conf...) while when
> using the git stable branch and EXA I get a BLACK LINE.Pretty strange
> huh?:-)
> 
> These behaviours seem to appear only when I'm using the Grab and Drag
> Firefox add-on ( an Add-on that allows finger dragging of web pages for
> my tablet PC).Maybe scrolling faster than the scroll bar causes this
> corruption, but looks like a bug in the rendering to me.

I'm a little confused by the above. Is the corruption permanent or only
intermittent?


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer