How can I verify whether hardware acceleration is available and whether it is enabled for my video card.
asked Aug 21, 2010 at 16:36
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1 Answer
If you don't already have it, install glxinfo; in APT it's part of mesa-utils:
apt-get install mesa-utils
Run glxinfo and look for a line about direct rendering (another term for hardware acceleration):
> glxinfo | grep "direct rendering"
direct rendering: Yes
If it says "Yes", hardware acceleration is enabled
answered Aug 21, 2010 at 16:47
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1In the spirit of teaching a man to fish, could you post some information on what the mesa-utils package and what the glxinfo command does? Aug 21, 2010 at 16:50
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5@Noah I don't actually use Ubuntu, so I know little about its packages, but Ubuntu's package description says it "provides several basic GL utilities built by Mesa, including glxinfo and glxgears". GLX is the X extension for OpenGL;
glxinfodisplays information about that extension, including the current direct rendering state Aug 21, 2010 at 16:56 -
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1Technically "direct rendering" only tells you whether your program is communicating directly with the graphics card driver. "indirect rendering" means you are communicating all 3D to the X server which then communicates with the graphics card. I think at some point it wasn't possible to have hardware acceleration without direct rendering, but now days indirect rendering can also be accelerated. By extension, it could also be possible to directly communicate with a driver that fakes hardware acceleration in the CPU, but i don't know of any instance of this.– M ConradJul 3, 2017 at 18:04
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3@MConrad is correct,
llvmpipeis CPU rendering, but shows as direct rendering (glxinfo | grep "renderer"), Either you know that the used renderer is GPU based or runningglxgearsand monitoring GPU usage with a tool likeradeontop(for AMD) will be a better test– untoreApr 29, 2021 at 14:51