[Chimera-users] mouse selection not working

lorenzo bongini at fi.infn.it
Mon Oct 5 01:07:29 PDT 2009

Thank you very much Creg for the prompt answer.
Actually, since now, chimera has worked just wonderfully on every Ubuntu
release I happened to deal with.
I made a diff (linux command diff) between my /usr/local/chimera and
that of the chimera I installed this summer on my wife netbook (ubuntu
8.04) and the only differences are in /usr/local/chimera/lib). Me and my
wife sport symbolic links to different sets of libraries.
My wife for example has:


Which of those libraries is responsible of the mouse selection tool?
My plan is to install a down-graded version of the guilty library for
chimera to use it.
If the answer is "more than one library is involved" which do you feel
are the best guesses to start with.

Thanks again


-----Original Message-----
From: Greg Couch <gregc at cgl.ucsf.edu>
To: lorenzo <bongini at fi.infn.it>
Cc: chimera-users at cgl.ucsf.edu
Subject: Re: [Chimera-users] mouse selection not working
Date: Sun, 4 Oct 2009 00:01:48 -0700

On Thu, 1 Oct 2009, lorenzo wrote:

> Hi everybody,
> I just installed chimera-1.3-linux.exe on an atom netbook. The OS is
> ubuntu 9.04. My problem is that the mouse selection tool does not work.
> To complete the scenario I add a few details
> 1) I don't have the green outline and setting Fill mode for selection
> highlighting in Preferences does not work around the problem (probably
> just a screen setting problem).
> 2) Other forms of selections work. For example by Select -> Chemistry ->
> Element -> H and then by Actions -> Atoms/Bonds -> Delete I can delete
> hydrogens.
> 3) I cannot delete anything that I select by ctrl + mouse left button.
> 4) libgl1-mesa-glx and libgl1-mesa-dri are installed.
> Thanks for your attention
>      Lorenzo Bongini

I'm pleasantly surprised to hear that chimera 1.3 works at all on ubuntu
9.04.  Many of the recent Linux distributions have altered their setup
enough to break chimera, so that is very good news.  For those other linux
distributions, the chimera daily build will be better.

But, the fact that the mouse selection tool does not work strongly
suggests that there is a bug in the one of the mesa (OpenGL) packages.
And since you're using ubuntu, you should file a bug report with them, so
it will get fixed and then, at some later date, the fix will show up in an
ubuntu update (e.g., the upcoming ubuntu 9.10).  Feel free to list me as
a technical contact.

As an aside, mesa is undergoing huge internal changes right now, partially
to improve the performance on low-end systems, so recent versions of Linux
are especially prone to OpenGL/mesa bugs.  If you have an ATI or NVidia
chipset in your computer, you will probably be better off installing the
closed-source driver from the respective vendor.

      -- Greg

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