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Weapon S 01-14-2013 04:54 AM

Intel graphics driver optimization

recently I've acquired a PC with (CPU integrated) Intel graphics i.e. 945G. I want to assure that my configuration is optimal.
I'm used to using the proprietary drivers for nVidia and ATI. The best (only?) Intel drivers apparently are open-source. If I install such a package via Aptitude on Debian, does it mean my graphics are automatically handled by that driver?
I could find some documentation, but not specifically how to check whether hardware acceleration is enabled. I know performance gain will be little. But I'm planning to work on a (mostly) software based graphics engine. Performance on (very) low-end systems is one of the prime goals, and I want to be sure my computer is configured optimally.
I don't seem to have a xorg.conf file... The only graphics drivers installed besides intel are fbdev and vmware. If I could get some pointers on how to configure this, I'd be grateful.

TobiSGD 01-15-2013 12:44 AM

The 945G is not CPU inbuilt, it is integrated into the chipset, but that is not really relevant. If you have the Intel drivers installed they will be used automatically, you don't neet a xorg.conf file for that. You can test that using

glxinfo | render

gradinaruvasile 01-15-2013 04:45 AM

If you used Nvidia/Ati before, dont expect much from this card. The only drivers for it are the Intel-made opensource drivers that are included in the kernel already (and they suck big time compared to the Windows Intel drivers).
The only thing that really can be done is to make sure you have the firmware packages installed. This depends on the distribution you are using though.
Anothe thing that sometimes helps is disabling kms. That too depends on the distro/version you use.

I personally would put a Nvidia or AMD card in the computer though.

Weapon S 01-15-2013 05:05 AM

Thanks that cleared up a lot and reassured me.

$ glxinfo | grep render
direct rendering: Yes
OpenGL renderer string: Mesa DRI Intel(R) 945G GEM 20091221 2009Q4 x86/MMX/SSE2

This does look like it's working. glxgears reports 357 FPS.

TobiSGD 01-15-2013 07:21 AM

Yes, you are using hardware acceleration. Keep in mind that glxgears is in no way a benchmark.

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