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Error: couldn't get an RGB, Double-buffered visual

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Does anybody know what the hell the following error means??? I'm sick and tired every time a new kernel is released to try to guess what has broken and my nvidia GPU cannot be used!

Quote:

$ glxgears
Xlib: extension "GLX" missing on display ":0".
Error: couldn't get an RGB, Double-buffered visual

$ optirun glxgears
Xlib: extension "GLX" missing on display ":8".
Error: couldn't get an RGB, Double-buffered visual

Below is the basic info about my system:

Quote:

$ rpm -qa *\nvidia\* *\kernel\*|sort;uname -r;lsmod |grep -e nvidia -e nouveau;cat /etc/X11/xorg.conf
abrt-addon-kerneloops-2.0.18-1.fc17.x86_64
akmod-nvidia-304.64-1.fc17.x86_64
kernel-3.6.10-2.fc17.x86_64
kernel-3.6.2-4.fc17.x86_64
kernel-3.6.3-1.fc17.x86_64
kernel-devel-3.6.10-2.fc17.x86_64
kernel-devel-3.6.2-4.fc17.x86_64
kernel-devel-3.6.3-1.fc17.x86_64
kernel-headers-3.6.10-2.fc17.x86_64
kmod-nvidia-3.6.10-2.fc17.x86_64-304.64-1.fc17.x86_64
kmod-nvidia-3.6.2-4.fc17.x86_64-304.64-1.fc17.x86_64
libreport-plugin-kerneloops-2.0.18-1.fc17.x86_64
nvidia-settings-1.0-22.fc17.x86_64
nvidia-xconfig-1.0-20.fc17.x86_64
xorg-x11-drv-nvidia-304.64-3.fc17.x86_64
xorg-x11-drv-nvidia-libs-304.64-3.fc17.i686
xorg-x11-drv-nvidia-libs-304.64-3.fc17.x86_64
3.6.10-2.fc17.x86_64
nvidia 11283758 0
i2c_core 38354 7 drm,i915,i2c_i801,drm_kms_helper,i2c_algo_bit,nvid ia,videodev
cat: /etc/X11/xorg.conf: No such file or directory

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