Could you help me with hell of a weird issue? I use Intellij IDEA 13 on Ubuntu 14.04, and from time to time my keyboard completely (yep, completely, it's not about shortcuts) locks in IDEA. I still can do anything I want in IDEA with my mouse, also I can use the keyboard everywhere else except IDEA. And it can be fixed only by restarting IDEA so far.

Can anybody give a hint, please?

  • Can it be that your keyboard is simply being captured by some field inside IntelliJ? Is it a random thing or does something specific trigger it? – Ruraj Jul 24 '14 at 7:08
  • I don't think some field can capture keyboard like that, but I'll check it more precisely next time. And it seems to be random thing. – Treble Snake Jul 24 '14 at 11:10
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    My collegue and I are experiencing precisely the same thing (same OS and IntelliJ 13.1.4). I have to restart IntelliJ once every few hours (I'm able to use Alt-F4, though) - extremely annoying. I also find it to happen completely randomly. Last time I was in the middle of editing an HTML file. Not while pressing a shortcut. – Halle Knast Jul 24 '14 at 12:28
  • I had two instances of IntelliJ running and they both froze. Don't know if it's relevant, but when I close the IDE, detaching a running application server normally takes very short time. After a freeze happens, I have to cancel that because it doesn't seem to finish. – Halle Knast Jul 24 '14 at 12:34
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    This is a Java issue that effects other Java Swing GUI's including SOAP UI. "ibus-daemon -rd" fixes the issue as well – rjdkolb Feb 9 '16 at 12:02

There is a an open issue in jetbrains youtrack for intellij idea that recommend two solutions:

  1. Keyboard input may be unlocked by restarting IBus daemon from a console:

    ibus-daemon -rd
  2. IBus can be disabled for IDEA by unsetting env. variable XMODIFIERS, but ability to input national characters in IDEA will be lost:

    XMODIFIERS="" idea.sh

I have used the second one and fixed my problem.

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    > "ibus-daemon -rd" from a console. That worked! Great-great thanks!) – Treble Snake Oct 23 '14 at 8:37
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    6 months later, Option 1 is no longer recommended as it may cause JVM crash :/ – mike May 1 '15 at 14:57
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    What do you mean national characters, @Mike, it worked for me today June the 2th – Abderrahmane TAHRI JOUTI Jun 2 '15 at 9:05
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    "ibus-daemon -rd" - I'm seriously considering to tattoo this on my arm. – Balázs Németh Jun 17 '15 at 13:24
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    Last update on the issue (Jun 17 2015) recommends to export IBUS_ENABLE_SYNC_MODE=1 – Nacho Coloma Sep 23 '15 at 12:01

I was able to solve it with what I found here that is basically adding export XMODIFIERS="" on idea.sh

  1. Temporary solution: simply execute ibus-daemon -rd on the terminal.
  2. Permanent solution: the 01 Oct 2015 update on the issue recommends to:

Either upgrade IBus to version 1.5.11 or add export IBUS_ENABLE_SYNC_MODE=1 to your ~/.profile, then restart a session.

Alternatively, you can turn off IBus at System Settings | Language Support | Keyboard input method.

IDEA 15 will show a warning if an incompatible version of IBus is in use.


I've tried this out and its working so far but I'll update if it freezes up again. I've seen a suggestion on youtrack that suggests to turn off iBus which seems to interfere particularly because of it's use of the ctrl + space shortcut to change language settings. You can do that by going to:

language support > keyboard input method system > none

enter image description here

**** UPDATE *****

After running it for a while this technique still didn't work as I kept freezing. I guess for now I'll stick to the following workaround to restart ibus which is a bit inconvenient but what can you do.

go into terminal


ibus-daemon -rd
  • thanks, ibus-daemon -rd is what I was looking for. – Lambart Apr 21 '16 at 19:05

protected by Community Apr 28 '16 at 8:10

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