Hi all,

When I run glxgears, I get the following error:
Error: couldn't get an RGB, Double-buffered visual.

Also, this is the output of glxinfo:
name of display: :0.0
Error: couldn't find RGB GLX visual or fbconfig

Previously, the error when I ran glxgears was:
Xlib: extension "GLX" missing on display ":0"
Error: couldn't find RGB GLX visual or fbconfig
Since then, I had downloaded updated nvidia drivers and now I'm not getting the Xlib GLX missing message, but I'm not sure if this is an improvement or not since I'm a bit new to Linux.

Does anyone have any advice on how to approach this problem? I've been trying to debug this for the past few weeks with no luck, so I would really appreciate some help on this.

output ofplease.

Thanks for responding. Here is the output:

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Subsystem: Sony Corporation Device 909a
Kernel driver in use: i915
Kernel modules: i915
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
Subsystem: Sony Corporation Device 9099
--
01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 640M LE] (rev ff)
02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 24)
Subsystem: Intel Corporation Centrino Advanced-N 6235 AGN
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01)

2 graphic cards in there.
the nvidia is not in use (no kernel driver in use).
maybe the intel card is not capable enough.
try to disable the intel and use nvidia only.
it's a tricky process, and if you need help with that, you have to
1. do some honest research yourself
2. share your findings
3. provide much more information. please see the first link in my signature.

I'm using CentOS 6.5.

I tried looking through the BIOS to see if I could disable the intel graphics card, but it didn't have an option there, other than for intel virtualization.
I also tried going to the other operating system, Windows 7, on my laptop and disabling the intel card through the device manager, but that only gave me a black screen and the intel card was re-enabled after restarting.

The next possible solution I'm going to try is downloading bumblebee, but does anyone have any other suggestions?