glxgears with dri slower than with software accel ?

adrenalin · Tux's lil' helper Joined: 29 Dec 2002 Posts: 129

Well it claims ~800 fps with dri and ~250 without, but it is visually *much* slower than without. Diablo 2 Lod in wine would crawl with ~2 fps without dri, but with dri i cant even go beyond the single player/battle net selection screen because the graphics seems so busy with drawing that screen (it so slow that i can see that the screen is drawn in 4 tiles) that it wont even show a mouse pointer and it would respond to the escape key after ~5 seconds.

kenthepostman · Posted: Sat Jul 17, 2004 2:06 pm Post subject:

What video card are you using? Is there another driver you might be able to use?

Jinidog · Guru Joined: 26 Nov 2003 Posts: 593 Location: Berlin

Hmm... by me, 3000 FPS looked slower than 250, but I think, that are amounts of frames, that this is possible.
250 FPS is much more, than a normal screen can display in a second.
(70 Hz= 70 FPS, if I'm not mistaken)
800 FPS could create a quite big dissynchronisation, what explains the visual slowness.

meyerm · Posted: Sat Jul 17, 2004 8:25 pm Post subject:

It doesn't need to be a (computer-)hardware problem. Your eyes / brain are just too slow.... ;-)

More than 25 fps are not really visible.

John5788 · Posted: Sat Jul 17, 2004 8:32 pm Post subject:

nah, ur eyes will notice difference there, the barrier is ~50 fps
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John5788

meyerm · Posted: Sat Jul 17, 2004 8:45 pm Post subject:

Hmm, I explained myself a little bit wrong. You can see up to a frequence of 25-30 fps that there are single frames. Everything above shall be a constant movement. Depending on your eyes.

But CRT-monitors are creating only half-images. The deflection coil doesn't need to be as fast :-)

. So your computer monitor need to be able to show at least ~60 Hz to "simulate a movement".

Am I wrong?

adrenalin · Tux's lil' helper Joined: 29 Dec 2002 Posts: 129

Actually the gears appear to *spin* much slower than without dri or with the nvidia drivers i used on my now gone gf 4200 ti.

But i have been partially wrong regarding the diablo issue. What i considered to be 'with dri' was actually 'with dri but without drm' because i used a different config file that was missing the dri device permission section. After fixing that i could finally start 'with dri and with drm' which would freeze the box completely. Ofcourse.