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Debian, fgl_glxgears: Using GLX_SGIX_pbuffer… Segmentation fault

1st October 2008

If you get Segmentation fault when trying to run fgl_glxgears in your Debian desktop environment, most often this would mean that 3D acceleration isn’t enabled.

For the case of ATI (and ATI Mobility) Radeon series, the easiest procedure would be (doing all as root, or prepending sudo to all commands):

1. aptitude update, to ensure you’ve got the list of latest packages
2. aptitude install fglrx-driver fglrx-control fglrx-kernel-src, for the actual driver; I also installed fglrx-atieventsd and fglrx-glx (these are driver-recommended packages)
3. aptitude install module-assistant, required for building the kernel module
4. module-assistant prepare, to verify that you have everything needed for the module build procedure
5. module-assistant update
6. module-assistant auto-install fglrx, to build and install the fglrx kernel module
7. depmod -a
8. modprobe fglrx, to load the fglrx kernel module
9. aticonfig ––initial, to configure ATI’s device section in /etc/X11/xorg.conf (for more options, see aticonfig ––help)
10. reboot

That should make your ATI hardware work as expected, and make fgl_glxgears show gears again.

If everything went fine, then your movies will play smoother ;), and the output of fglrxinfo will look similar to

display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI MOBILITY RADEON X600
OpenGL version string: 2.1.7769 Release

This procedure should be also possible for the latest ATI-provided installer-generated Debian packages (as described elsewhere), but I decided to stick to the repository version – this requires no extra tweaking.

For much more information, see the ATI Debian Installation Guide.

This post is based on the iwanabeguru’s response at Linux Forums.

This entry was posted on Wednesday, October 1st, 2008 at 18:17 and is filed under *nix. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

5 Responses to “Debian, fgl_glxgears: Using GLX_SGIX_pbuffer… Segmentation fault”

1. user Says:
   January 11th, 2011 at 5:03

   Couldn’t find any package whose name or description matched “module-assisstant”

2. Bogdan Says:
   January 18th, 2011 at 15:40

   Have you tried copy-pasting

   sudo aptitude install module-assistant

   ?

   Because at least in your comment you have an extra s in the word assistant.

3. Slobo Says:
   August 25th, 2011 at 20:17

   Hi Bogdan, seems like the extra s is from your post above (item 3)

4. Bogdan Says:
   August 26th, 2011 at 0:29

   oops

   So the fault is all mine, after all

   Now fixed, thanks for reporting.

5. Bogdan Says:
   August 26th, 2011 at 0:31

   I guess this post is less than half-correct now – dkms should be automatically building the kernel module in recent Debian versions.

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