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Bug 955347 - OpenGL GLX extension is missing
Summary: OpenGL GLX extension is missing
Keywords:
Status: CLOSED DUPLICATE of bug 950708
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: tigervnc
Version: 6.4
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: rc
: ---
Assignee: Adam Tkac
QA Contact: qe-baseos-daemons
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-04-22 19:31 UTC by Konstantin Olchanski
Modified: 2013-04-30 23:53 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-04-25 11:30:30 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Konstantin Olchanski 2013-04-22 19:31:10 UTC 
The 6.4 update replaced tigervnc-1.0.90-0.17.20110314svn4359.el6.x86_64 with tigervnc-1.1.0-5.el6.x86_64. The updated VNC server is missing the GLX extension and all OpenGL programs fail to work. Typical errors are:

$ glxinfo
name of display: :1
Error: couldn't find RGB GLX visual or fbconfig

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

$ glxgears (on a machine with NVIDIA proprietary drivers)
Xlib:  extension "GLX" missing on display ":2".
Error: couldn't get an RGB, Double-buffered visual

I confirm that all these programs worked before this update and still work on a 6.3 machines.

The following patch was recently applied to current TigerVNC sources and may be relevant to this problem:
http://tigervnc.svn.sourceforge.net/viewvc/tigervnc/trunk/unix/xserver/hw/vnc/xvnc.cc?r1=5047&r2=5067

Removal of OpenGL and GLX capability from VNC causes a big problem for us. We use VNC to run some scientific applications (i.e. COMSOL) on head-less server machines to do heavy computations in batch mode (>16GB of RAM, >24 hours of running time). In this mode, these applications do not do any heavy graphics, but would not start if OpenGL is not present. For a number of reasons running these applications via SSH-tunneled X11 is not practical.

Please restore the previously existing and supported OpenGL functionality to the current RHEL VNC server.

K.O.
Comment 1 Adam Tkac 2013-04-25 11:30:30 UTC 

*** This bug has been marked as a duplicate of bug 950708 ***
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