Public bug reported:
Binary package hint: xorg
Description of the problem:
By default composite is enabled in xorg. However unless it is disabled or an
extra option added, GL applications will be unable to run when using the binary
nvidia-glx-legacy drivers.
Steps to reproduce:
1. Install Feisty (Herd 5).
2. Install
nvidia-glx-legacy
on a GeForce 1.
3. Restart gdm .
4. Run
glxgears
.
Expected result:
Spinning gears to be displayed.
Actual result:
Xlib: extension "GLX" missing on display ":0.0".
Error: couldn't get an RGB, Double-buffered visual
Additional information:
The following is reported in /var/log/Xorg.0.log :
(EE) GLX is not supported with the Composite extension
This can be worked around by adding either of the following to
/etc/X11/xorg.conf :
Section "Extensions"
Option "Composite" "Disable"
EndSection
or (Under Section "Device")
Option "AllowGLXWithComposite" "True"
With regard to the later option the README has this to say:
[AllowGLXWithComposite] Enables GLX even when the Composite X extension is
loaded. ENABLE AT YOUR OWN RISK. OpenGL applications will not display
correctly in many circumstances with this setting enabled.
(this option has often worked for me but I don't do too much GL stuff)
This problem has also been documented over in the wiki:
https://help.ubuntu.com/community/BinaryDriverHowto/Nvidia#head-d3968a4d3bed6eeef4b10fd3202bcdf313b1e75d
Version information:
xorg 7.2-0ubuntu6
nvidia-glx-legacy 1.0.7184+2.6.20.2-9.8
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: Unconfirmed
--
nvidia-glx-legacy has disabled GL by default
https://launchpad.net/bugs/91064
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