There is currently a serious incompatibility between LyX and IBus (the
default input method in Ubuntu and Fedora) that causes various problems:
* The keyboard starts outputting the wrong keys
* LyX completely and definitely stops responding
* When using arrow keys or page up/down, the movement continues for a
long while after the key has been released.
If you have experienced these bugs and use Linux, then you may be a
victim of this incompatibility. The main trigger is a heavy system load
so it happen more often to users with long documents with which LyX is slow.
I have just found the reason to these bugs so I wanted to share the
workarounds:
* Disable IBus just for LyX (if you don't need a special input method):
Run LyX with the command line:
XMODIFIERS= lyx
or equivalently (in Ubuntu) adapt /usr/share/applications/lyx.desktop
as follows:
Exec=env XMODIFIERS= lyx %F
or:
* Set IBus to synchronous system-wide (keeps IBus in LyX, but does not
solve the third issue and causes problems with the hangul input
method):
Add the following line to .xsessionrc (create if needed):
export IBUS_ENABLE_SYNC_MODE=1
Follow the bug at <http://www.lyx.org/trac/ticket/9362>.
