[ltp] 3D acceleration on ThinkPad T42 (SOLVED!)

[Martin Steigerwald]

Am Dienstag 19 Dezember 2006 00:34 schrieb Alex Deucher:

> ---------------------------------------------------------------------
> martin@shambala:~> glxinfo | grep render
> direct rendering: No
>     GLX_ATI_pixel_format_float, GLX_ATI_render_texture
> OpenGL renderer string: Mesa DRI R300 20060815 AGP 4x TCL
> ---------------------------------------------------------------------

[... bottom output omitted ...]

> > So now anybody who can tell me the difference of these outputs? ;-)
>
> The top one is using indirect rendering (ie. sending openGL throught
> the X server via GLX).  The indirect renderer is HW in this case
> (AIGLX).  For some reason direct rendering is not working.  I guess
> you have a lib problem with libGL or libdrm.  Maybe remnants of an old
> fglrx install?

Hello Alex,

I made sure that kernel module "fglrx" is not loaded, "radeon" drm module 
is loaded and xorg.conf specifies "radeon" or "ati" as driver.  

Well obviously that was not enough: After "aptitude purge fglrx-control 
fglrx-driver fglrx-kernel-2.6.19.1-ck2-tp42-sws2-2.2.9 fglrx-kernel-src" 
(I think it was the fglrx-driver package as it contained some libgl 
diversion) and reboot I get:

---------------------------------------------------------------------
martin@shambala:~> glxinfo | grep render
libGL warning: 3D driver claims to not support visual 0x4b
direct rendering: Yes
OpenGL renderer string: Mesa DRI R300 20060815 AGP 4x TCL
martin@shambala:~> 
glxgears -iacknowledgethatthistoolisnotabenchmark -printfps
libGL warning: 3D driver claims to not support visual 0x4b
11164 frames in 5.0 seconds = 2232.725 FPS
13686 frames in 5.0 seconds = 2736.855 FPS
11915 frames in 5.0 seconds = 2382.880 FPS
13910 frames in 5.0 seconds = 2781.889 FPS
13934 frames in 5.0 seconds = 2786.779 FPS
---------------------------------------------------------------------

Yeeeaaaah! ;-) Yes, I know glxgears is not benchmark, but this is really 
fine ;-). And it is not a bit of jerky now anymore, completely smooth 
now.

I have about 65% of CPU utilitization at 1800 MHz... but these are in 
glxgears now, not in X - probably the price for insane 2700 fps? In 
standard glxgears window size X doesn't need more than 1-2% of CPU. If I 
resize it to a larger size, fps goes down, glxgears CPU utilitization 
goes down and X CPU utilization goes up.

Bye, bye fglrx ;). When I find time I want document it a bit more in the 
ThinkWiki!

BTW 3D acceleration also runs with Composite extension enabled - unlike 
with fglrx. But when I start kompmgr my desktop gets unusably slow... it 
was way faster (although still too slow) on my ThinkPad T23 with 
SuperSavage.

Thanks, Alex! Thank you other guys for all the help!

Regards
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7