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Recently, I was fortunate enough to get DRI working with the ATI Radeon IGP (320M) on my laptop -- it required lots of compiling (recompile of X, switch from X.org to XFree, etc). I get very high FPS in most 3D/video now comparitavily to non-DRI, e.g. screensavers run at 30-60fps as opposed to 2-5fps, and video doesn't loose sync (with sound) in Mplayer.
I'm having a few issues though, and I think its related to SDL. When I run an application that uses SDL in fullscreen, the screen sort of fades to black -- the effect is hard to describe, it's like ice/condensation freezing over on a window, I guess. I've noticed though, that the screen isn't completely blank, if I move the mouse round, I can see it stretched the full length of the screen in places (vertically), and in other places it completely disappears. Whatever I'm trying to view isn't on the screen either.
I was having mixed results trying to use the Quake 3 demo, if I ran it in a resolution lower than 640x480 (fullscreen), I would get the same problem as with other fullscreen (SDL?) apps. If I ran it in 800x600, the screen would be mostly filled, with the right side of the screen being really distorted and stretched. 1024x768 (the max res of my laptop screen) was totally fine.
The SDL test apps run perfectly in (their default) windowed mode, but when run in fullscreen (with the -fullscreen parameter), the problem again occurs.
What I've tried:
Recompiling/upgrading SDL. By doing this, Q3 demo seems to have stopped displaying properly at all. Even in windowed mode.
I've tried installing GGI and recompiling SVGAlib and then enabling support for them in SDL, and then using those as the video driver -- svgalib doesn't seem to work, and GGI gave funny colours
I've edited my XFree config to specify on the resolution used by my screen, as well as several resolutions -- this didn't seem to have any impact on it
I assume to sort the problem I need to get SDL to use the resolution of my screen, because at the moment it looks like its putting the image off screen, then waaay over stretching it onto the viewable area of the screen
The specs for the graphics are ATI Radeon IGP (320M) 64MB (shared), 14" laptop panel screen, HP/Compaq NX9005, running Slackware 9.1, 2.6.6 kernel, XFree 4.4, DRI build from CVS few weeks old...
Hmm, I just updated the kernel to 2.6.7, recompiled the DRI kernel module, rebooted, and it appears that full screen mode works in most things! All the SDL test apps work in fullscreen and so do the other fullscreen apps, however, Q3 is still ballsed up...
One step closer...
Edit: randomly, q3 now works again, windowed and fullscreen, and all fullscreen modes scale properly.
I've recently installed dropline Gnome 2.8 and that completely broke my X install, complaining that certain modules in my X.org config didn't exist, and it couldn't find modules such as the keyboard (any idea?). This lead to me recompling XFree86 and installing that (which I normally have to do, since X.org doesn't support the 320m for DRI, aparently?)
I'm sure GLX gears was showing something like 900 FPS when DRI was working, but sadly, at the moment, it's broken again.
What config are you using with it? I mean modules, kernel, X build, etc.