first of all this is just a question, because until now I did not bring problems:
my integrated graphics is:
lspci | grep VGA
00:0d.0 VGA compatible controller: nVidia Corporation C61 [GeForce 7025 / nForce 630a] (rev a2)
I use the PC normally without OpenGL acceleration (without rendering), but I made a small script to change drivers and use with OpenGL rendering, timely Minetest to play.
Built two directory in /etc/X11 (no_render and yes_render) with their respective 60-Device.conf to use the corresponding.
---------------------------------------------------
script:render_yes.sh
#!/bin/sh
# WITH RENDERING: modifies /etc/X11/xorg.conf.d/60-Device.conf - uninstall xorg-xf86-video-nv-2.1.18.tazpkg and install nvidia-173xx-173.14.31_2.6.37.tazpkg
# Config file is: /home/tux/render_yes.sh
#
tazpkg remove xorg-xf86-video-nv
cd /
tazpkg install /var/cache/tazpkg/4.0/packages/nvidia-173xx-173.14.31_2.6.37.tazpkg
cp -a /etc/X11/yes_render/60-Device.conf /etc/X11/xorg.conf.d
echo " Logout sesion"
----------------------------------------------------
script: render_no.sh
#!/bin/sh
# WITHOUT RENDERING: modifies /etc/X11/xorg.conf.d/60-Device.conf - install xorg-xf86-video-nv-2.1.18.tazpkg, uninstall nvidia-173xx-173.14.31_2.6.37.tazpkg
# Config file is: /home/tux/render_no.sh
#
tazpkg remove nvidia-173xx
tazpkg install /var/cache/tazpkg/4.0/packages/xorg-xf86-video-nv-2.1.18.tazpkg
tazpkg install /var/cache/tazpkg/4.0/packages/mesa-demos-8.0.1.tazpkg
cd /
cp -a /etc/X11/no_render/60-Device.conf /etc/X11/xorg.conf.d
echo " Logout sesion"
echo " Reboot system"
reboot
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Note: yes_render/60-Device.conf >> Driver "nvidia"
no_render/60-Device.conf >> Driver "nv"
--------------------------------------------------------
**Now working WITH RENDERING works well and if I
$ glxinfo | grep render
direct rendering: Yes
OpenGL renderer string: MCP61/PCI/SSE2/3DNOW!
GL_NVX_conditional_render, GL_SGIS_generate_mipmap, GL_SGIS_texture_lod,
~$ glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
11647 frames in 5.0 seconds = 2329.332 FPS
11435 frames in 5.0 seconds = 2286.985 FPS
11542 frames in 5.0 seconds = 2308.205 FPS
11477 frames in 5.0 seconds = 2295.274 FPS
11751 frames in 5.0 seconds = 2350.171 FPS
16356 frames in 5.0 seconds = 3271.065 FPS
17286 frames in 5.0 seconds = 3457.145 FPS
17390 frames in 5.0 seconds = 3477.941 FPS
17113 frames in 5.0 seconds = 3422.409 FPS
XIO: fatal IO error 22 (Invalid argument) on X server ":0.0"
after 113 requests (113 known processed) with 0 events remaining.
*****************************************************
**and WITHOUT RENDERING also works well, but in doing
$ glxinfo | grep render
/bin/sh: grp: not found
Error: couldn't find RGB GLX visual or fbconfig
$ glxgears
Error: couldn't get an RGB, Double-buffered visual
Question: What does this error?