Hi,

James Whittle wrote:
Hi-

There seems to be a problem enabling stereo with coot on RHEL 5, which
results in the error:

CATASTROPHIC ERROR:: in gl_extras no GtkGL widget!
WARNING:: switch to hardware_stereo_mode failed

I've found mention of this through a google search, but no solution. Has
anyone encountered this and found a way to fix it?

I think you need to disable composite extensions (do a search for "Stereo" in /var/log/Xorg.0.log):

Key sections of our xorg.conf:

Section "Device"
    Identifier     "Videocard0"
    Driver         "nvidia"
    BoardName      "needname"
    Option      "Stereo" "3"
EndSection

Section "Extensions"
    Option         "Composite" "false"
EndSection

HTH,
Sabuj Pattanayek
CSBSysAdmin
http://structbio.vanderbilt.edu

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