Try patch at https://bugzilla.gnome.org/show_bug.cgi?id=696756#c3
It works to remove this message in evolution 3.6.4:
(evolution:25937): Gdk-CRITICAL **: gdk_device_get_source: assertion
`GDK_IS_DEVICE (device)' failed
** Bug watch added: GNOME Bug Tracker #696756
*** This bug is a duplicate of bug 568492 ***
https://bugs.launchpad.net/bugs/568492
Workaround: change the font.
e.g. add to ~/.vimrc
set guifont=liberationmono
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It's a known bug, which upstream seem to enjoy ignoring:
http://bugs.freedesktop.org/show_bug.cgi?id=11838
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font settings in .fonts.conf ignored
https://bugs.launchpad.net/bugs/293643
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Pastebin messes up your file - line 9 is missing!
Here's a ~/.fonts.conf to use as a proper test.
Exactly which font file are you using? Make it easy for people to
reproduce your problem. State a URL to the font, and/or its version
number (shown by gnome-font-viewer) and exact filesize.
Next,
You haven't explained what all your other fontconfig rules (in
/etc/fonts/ and ~/.fonts.conf) set rgba, autohint, antialias and hinting
to. So this bug report doesn't make much sense ;)
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font settings in .fonts.conf ignored
https://bugs.launchpad.net/bugs/293643
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