Radeon Driver Default Display Resolution

Hamish hamish at travellingkiwi.com
Tue Apr 1 01:41:15 PDT 2008

On Monday 31 March 2008 23:36:15 you wrote:
> On Mon, Mar 31, 2008 at 11:07 AM, Hamish <hamish at travellingkiwi.com> wrote:


> >
> >  On the same vein... I find my X600 to be really really slow.. Painfully
> > slow. Could that be due to too a large desktop (2704x1050)? Or am I doing
> > something wrong? Is an X600 just a slow card? I thought it should be good
> > enought for compiz even... But only if you're prepared for several
> > seconds wait whenever focus changes...
> The coordinate limits of the 3D engine are 2560x2560 and the max
> texture size is 2048x2048.  Beyond these limits you are left with
> basic 2D accel, which doesn't do much for modern desktops.  For now
> you'll probably have better luck with XAA if you were using EXA.

That 2560x2560... Is that a hardware or software limit? If I upgraded the card 
to a 3650 or 3850 would there still be these limits? (I tried EXA for about 
10 minutes... That was unusable... You could see the window scrolling... 
Slower than an old XT (I mean PC-XT) with 80x25 green screen).

However I also tried a virtual desktop of 2048x1050... And got two display of 
1024 width. And the X600 was just as slow then as it was with the 2704 
virtual width. (I verified the 2048 virtual width by attempting to resize the 
large monitor to 1680x1050, and got the xrandr error that the virtual size 
was only 2048).

I ran up oprofile... But gentoo strips libGL and the only info it gives me at 
the moment is that any app spends all it's time somewhere in there. Even if 
it's only a 1024x768 window... (I take it the 3D engine is disabled 
completely is the screen area is over the limits, rather than on a 
per-window/GLXContext basis?


More information about the xorg mailing list