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There are lots of things that could be wrong. To confirm that the
X11/OpenGL GLX extension is missing, run the <tt>glxinfo</tt>
program from the <tt>mesa-utils</tt> package (if you need to
install <tt>mesa-utils</tt>, installing the associated dependencies
might solve your problem) -- it should fail. Next examine <tt>/var/log/Xorg.0.log</tt>
to see the error the X11 server has loading the GLX extension. Fix
that error, restart the X11 server, and repeat until the glxinfo
program works. Then Chimera should work too.<br>
<div class="moz-forward-container">
<div class="moz-cite-prefix"> <br>
Last bit of advice, a simple thing to try is to (re)install the
graphics driver. If you have AMD/ATI or NVIDIA graphics, we
strongly recommend that you install the proprietary driver that
is installed with the <tt>Additional Drivers</tt> tool in the <tt>System
Settings</tt> dialog. If you have Intel graphics and <tt>glxinfo</tt>
works, but Chimera doesn't, then make sure you have all the
Ubuntu patches installed. But even if you keep your system
up-to-date, if you have Intel graphics, you should switch to
newer versions of Ubuntu when they come out -- for instance,
today, you should upgrade to 12.10, and I'd recommend 13.04 when
it comes out, <i>ad infinitum</i> or at least for the next 5
years, until the Intel graphics driver is much less buggy (it
has drastically improved in the last couple of years, but there
is much more being done).<br>
<br>
HTH,<br>
<br>
Greg<br>
<br>
On 11/06/2012 12:26 PM, <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:sette@uniroma2.it">sette@uniroma2.it</a> wrote:<br>
</div>
<blockquote
cite="mid:20121106212634.17484z9lhbp9fhbu@webmail.uniroma2.it"
type="cite"> <br>
Dear all, <br>
<br>
in Ubuntu 12.04, 32 bit, I have the following error message when
starting Chimera 1.6.2: <br>
<br>
"Error initializing OpenGL: X server is missing OpenGL GLX
extension. Couldn't configure togl widget". <br>
<br>
Do you know a solution for this problem? <br>
<br>
Thanks, <br>
Marco <br>
<br>
<br>
Dr.Marco Sette, Ph.D. <br>
<br>
Department of Chemical Sciences and Technology <br>
University of Rome, "Tor Vergata" <br>
via della Ricerca Scientifica, 00133, Rome, Italy <br>
e-mail: <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:sette@uniroma2.it">sette@uniroma2.it</a> <br>
e-mail: <a moz-do-not-send="true"
class="moz-txt-link-abbreviated" href="mailto:m77it@yahoo.it">m77it@yahoo.it</a>
<br>
Tel.: +39-0672594424 <br>
Fax: +39-0672594328 <br>
<br>
<a moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="http://www.rete29aprile.it">www.rete29aprile.it</a> <br>
<br>
<br>
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</blockquote>
<br>
<br>
<br>
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