This is an issue with Python 2.4, which Chimera is using -- it doesn't know how to properly start Firefox. We'll try to get the Python folk to fix this. Until then, if you set your BROWSER environment variable to "firefox '%s' &" (before starting Chimera), then things will work right. For csh-style shells, you would set it with the command: setenv BROWSER "firefox '%s' &" for sh-style shells: BROWSER="firefox '%s' &"; export BROWSER The above assumes that "firefox" is on your execution path. If it's not then you will have to give the full path to the Firefox executable. Obviously, you probably want to put these commands in you shell's startup file so that you don't have to type them every time. Eric Pettersen UCSF Computer Graphics Lab pett@cgl.ucsf.edu http://www.cgl.ucsf.edu On Oct 19, 2005, at 12:59 PM, Mingfeng Yang wrote:

Chimera version 1 build 2176,

1. start chimera, load in a protein 2. from help-->user guide, open firefox webbrowser to read help information 3. chimera main window becomes dead (black screen, not respond to mouse click and keyboard.) 4. close firefox browser, chimera goes back to normal

OS: Gentoo linux, kernel-2.6.10 Firefox: version 1.07, build from gcc-3.4.4

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