Running unclutter without "-noevent" causes focus problems for Firefox and Thunderbird

Can you check if the problem still appears with unclutter 8-19? It's available from Saucy onwards.

See http://packages.qa.debian.org/u/unclutter/news/20130502T003252Z.html (or https://bugs.launchpad.net/ubuntu/+source/unclutter/+bug/385034) for the changelog entry.

According to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=266118#17 the patch applied in 8-19 has a similar effect as -noevents except that it still works with some more window managers.

With regards to -grab: That can causes similar problems, so I'm reluctant putting this in by default.

BTW, the issues fixed in 8-19 don't affect all XULRunner applications as it e.g. doesn't affect conkeror (only available in Debian) while Firefox/Iceweasel does have known issues in combination with unclutter 8-18. But these issues are flickering as reported in https://bugs.launchpad.net/ubuntu/+source/unclutter/+bug/385034

As you can see in the bug report, I'm still running precise (12.04) so I cannot easily upgrade to unclutter version 8-19.

Reading the debian bug report I'm pretty sure that this bug is something else because I haven't seen any extra CPU usage. The incorrect focus movement seems to be single-shot process, as far as I know.

The only thing that goes wrong is that the keyboard focus is in incorrect window (I don't know how Firefox/Thunderbird creates the windows and how it's possible that the window manager renders focus indicators in one window and keyboard input goes to another window. If Firefox/Thunderbird does process wide input handling, then it does make sense and the only thing going wrong is Firefox/Thunderbird internal focus book keeping).

I believe that Firefox and Thunderbird are standalone programs running on Ubuntu; there's no dependency on XULRunner and the directories /usr/lib/firefox and /usr/lib/thunderbird seem to contain different libxul.so implementations. As such, it may be that XULRunner is okay but Firefox and Thunderbird are faulty.

Status changed to 'Confirmed' because the bug affects multiple users.

More technical information her: https://bugzilla.mozilla.org/show_bug.cgi?id=625149

Mozilla devs won't fix it, and suggest that it's unclutter that should provide a fix. :(
That is from the link above, and also here: https://bugzilla.mozilla.org/show_bug.cgi?id=923349

I was experiencing this issue on OSGeo Live, which uses Xubuntu.

I have followed instructions and set the unclutter settings as follows:
```
EXTRA_OPTS="-idle 2 -root -noevents"
```

Running the following command resolved the issue:
```
unclutter -idle 2 -root -noevents &
disown -h
```