Xlib: extension "GLX" missing on display ":8".

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tevang
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Xlib: extension "GLX" missing on display ":8".

Post by tevang » 2015/07/13 16:57:28

I am getting again this VERY ANNOYING and common error that prevents me from using heavy graphics for my work. I don't know what happened, perhaps an update, that brought it to the surface again. Everything was running fine but today I get the following errors:

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

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$ optirun glxinfo
name of display: :0.0
Xlib:  extension "GLX" missing on display ":8".
Xlib:  extension "GLX" missing on display ":8".
Xlib:  extension "GLX" missing on display ":8".
Xlib:  extension "GLX" missing on display ":8".
Xlib:  extension "GLX" missing on display ":8".
Error: couldn't find RGB GLX visual or fbconfig

Xlib:  extension "GLX" missing on display ":8".
Xlib:  extension "GLX" missing on display ":8".
[VGL] ERROR: in glXGetConfig--
[VGL]    1071: Could not obtain RGB visual on the server suitable for off-screen rendering
I am on CentOS 6.6 with kernel 2.6.32-504.23.4.el6.x86_64. Please someone troubleshoot me to find the cause of the problem.

Whoever
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Joined: 2013/09/06 03:12:10

Re: Xlib: extension "GLX" missing on display ":8".

Post by Whoever » 2015/07/15 04:41:05

":8" -- is this in a VNC session? Are you using the nVidia graphics driver?

tevang
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Joined: 2014/02/18 14:29:51

Re: Xlib: extension "GLX" missing on display ":8".

Post by tevang » 2015/07/15 12:59:58

No it is not a VNC session. I am using the latest proprietary NVIDIA drivers (NVIDIA-Linux-x86_64-352.21) on CentOS 6.6. I am on a laptop with a GPU and hence have to deactivae nouveau and use bumblebee. Here are my system specifications:

CentOS release 6.6 (Final)

Linux thomasASUS 2.6.32-504.16.2.el6.x86_64 #1 SMP Tue Apr 21 13:51:06 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux

baseboard-manufacturer: [sudo] password for thomas:
ASUSTeK COMPUTER INC.
baseboard-product-name: N56VZ
baseboard-version : 1.0
system-manufacturer : ASUSTeK COMPUTER INC.
system-product-name : N56VZ
system-version : 1.0
bios-vendor : American Megatrends Inc.
bios-version : N56VZ.202
bios-release-date : 03/15/2012

optirun (Bumblebee) 3.2.1

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TrevorH
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Re: Xlib: extension "GLX" missing on display ":8".

Post by TrevorH » 2015/07/15 13:03:04

Did you install the nvidia drivers using their own installer or using ELRepo's packages?
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tevang
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Re: Xlib: extension "GLX" missing on display ":8".

Post by tevang » 2015/07/15 13:03:39

Their own installer.

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TrevorH
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Re: Xlib: extension "GLX" missing on display ":8".

Post by TrevorH » 2015/07/15 13:06:36

That may be the problem then. Their installer overwrites files from some of the xorg/mesa packages and if an update for those arrives from CentOS and they are reinstalled then those overwritten files are no longer overwritten and the driver goes wrong, sometimes spectacularly and causes a complete X crash. The ELRepo packages don't do that. Did you try reinstalling the nvidia drivers to see if that fixes the problem?
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tevang
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Re: Xlib: extension "GLX" missing on display ":8".

Post by tevang » 2015/07/15 13:14:56

Yes, I just reinstalled the latest proprietary NVIDIA drivers and got this error in Xorg.8.org:

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[   560.163] (II) Loading /usr/lib64/xorg/modules/extensions/nvidia/libglx.so
[   560.163] (EE) Failed to load /usr/lib64/xorg/modules/extensions/nvidia/libglx.so: /usr/lib64/xorg/modules/extensions/nvidia/libglx.so: cannot open shared object file: No such file or directory
[   560.163] (II) UnloadModule: "glx"
[   560.163] (II) Unloading glx
[   560.163] (EE) Failed to load module "glx" (loader failed, 7)

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TrevorH
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Re: Xlib: extension "GLX" missing on display ":8".

Post by TrevorH » 2015/07/15 15:21:56

That missing file still belongs to the nvidia proprietary driver so points to an error in its installation.
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tevang
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Re: Xlib: extension "GLX" missing on display ":8".

Post by tevang » 2015/07/15 15:23:10

I will try to install an older driver and see what happens.

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