MW> I had the same issue. The problem is, that the /usr/X11R6/bin folder is
MW> 700 with owner root. I changed it to 755 and then everything works fine.
I just reported a bug against gv that set /usr/X11R6/{bin,lib,man}
permissions to 700. There may be more such packages - perhaps someone
should do an audit against this problem. I didn't find more offenders in
my system.
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Meelis Roos