Minecraft Forums

I couldn't find anybody else with this problem, when minecraft is running on my Ubuntu machine (14.04), you can alt-tab to other programs (i.e. browsers), but can't use the mouse at all. Minecraft seems to be running ok, but you can pop over to your browser to check email or whatever.

Any idea what causes this?

I just upgraded from OpenJDK7 to Oracle Java8, no change.

Can you post a launcher log?

You mean this?

[21:06:31 INFO]: Minecraft Launcher 1.6.70 (through bootstrap 5) started on linux...
[21:06:31 INFO]: Current time is Dec 23, 2016 9:06:31 PM
[21:06:31 INFO]: System.getProperty('os.name') == 'Linux'
[21:06:31 INFO]: System.getProperty('os.version') == '3.13.0-101-generic'
[21:06:31 INFO]: System.getProperty('os.arch') == 'amd64'
[21:06:31 INFO]: System.getProperty('java.version') == '1.8.0_111'
[21:06:31 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[21:06:31 INFO]: System.getProperty('sun.arch.data.model') == '64'
[21:06:31 INFO]: proxy == DIRECT
[21:06:31 INFO]: JFX is already initialized
[21:06:32 INFO]: Refreshing local version list...
[21:06:33 INFO]: Refreshing remote version list...
[21:06:33 INFO]: Refresh complete.
[21:06:34 INFO]: Loaded 21 profile(s); selected '1.11'
[21:06:34 INFO]: Refreshing auth...
[21:06:34 INFO]: Logging in with access token

After clicking play and waiting a bit

Hmmm, that previous I got from the tab in the launcher screen; after clicking play the launcher goes away and I don't know how to get it back. I did find ~/.minecraft/logs/latest.log, but that seems to be a different log; if this is not what you're asking for, please let me know how to find the right log, thx!

I started up the launcher, clicked play for a 1.11 profile, went into one of the saved worlds, alt-tabbed over to a browser, did a few ineffective clicks, alt-tabbed back to minecraft, and then shut it down.

[07:24:38] [Client thread/INFO]: Setting user: SetterCraft
[07:24:40] [Client thread/INFO]: LWJGL Version: 2.9.4
[07:24:41] [Client thread/INFO]: Reloading ResourceManager: Default
[07:24:41] [Sound Library Loader/INFO]: Starting up SoundSystem...
[07:24:42] [Thread-5/INFO]: Initializing LWJGL OpenAL
[07:24:42] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[07:24:42] [Thread-5/INFO]: OpenAL initialized.
[07:24:42] [Sound Library Loader/INFO]: Sound engine started
[07:24:44] [Client thread/INFO]: Created: 1024x512 textures-atlas
[07:25:00] [Server thread/INFO]: Starting integrated minecraft server version 1.11.2
[07:25:00] [Server thread/INFO]: Generating keypair
[07:25:00] [Server thread/INFO]: Preparing start region for level 0
[07:25:01] [Server thread/INFO]: Changing view distance to 20, from 10
[07:25:02] [Server thread/INFO]: SetterCraft[local:E:9b4f2609] logged in with entity id 15 at (-2019.459343588965, 74.25389430353246, 575.9227321170692)
[07:25:02] [Server thread/INFO]: SetterCraft joined the game
[07:25:05] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2300ms behind, skipping 46 tick(s)
[07:25:09] [Server thread/INFO]: Saving and pausing game...
[07:25:09] [Server thread/INFO]: Saving chunks for level 'Free Build'/Overworld
[07:25:10] [Server thread/INFO]: Saving chunks for level 'Free Build'/Nether
[07:25:10] [Server thread/INFO]: Saving chunks for level 'Free Build'/The End
[07:25:42] [Server thread/INFO]: Stopping server
[07:25:42] [Server thread/INFO]: Saving players
[07:25:42] [Server thread/INFO]: SetterCraft lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null, insertion=null}}
[07:25:42] [Server thread/INFO]: SetterCraft left the game
[07:25:42] [Server thread/INFO]: Stopping singleplayer server as player logged out
[07:25:42] [Server thread/INFO]: Saving worlds
[07:25:42] [Server thread/INFO]: Saving chunks for level 'Free Build'/Overworld
[07:25:42] [Server thread/INFO]: Saving chunks for level 'Free Build'/Nether
[07:25:42] [Server thread/INFO]: Saving chunks for level 'Free Build'/The End
[07:25:44] [Client thread/INFO]: Stopping!
[07:25:44] [Client thread/INFO]: SoundSystem shutting down...
[07:25:45] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com

A little more clarification; minecraft seems to be stealing the mouse from the OS. If you alt-tab away from minecraft, and then click and come back, the clicking doesn't affect the other apps, but when you alt-tab back to minecraft you can see that your clicks may have affected minecraft, i.e. chosen some random save file or tried to connect to a lan or something.

You can still use the keyboard for other apps, like type into xterm, or ALT-num to switch tabs, spacebar to start/stop youtube vids, etc. You can still roam with the mouse, just not click. For instance you can raise ubuntu's autohidden launcher sidebar, just not click on any of the launcher icons, it immediately autohides again.

Also, this problem started happening ("for no apparent reason") when we had OpenJDK7 running, it had been going fine for at least a year. To try to solve it I installed Oracle Java8 (apparently I can't install OpenJDK8 while still on 14.04, I would need to upgrade to 16.04)

Have you tried upgrading to 16.04(or 16.10?), also, are you using Wayland?

Never heard of Wayland before, googled it, I guess I'm probably not. Haven't tried upgrading to 16.04.

I do have another laptop in the house that is 16.04, I guess I could try installing minecraft on there and see how it does.

Is Wayland something minecraft started to depend on in some recent upgrade?

Nono, its something trying to replace Xorg(which is very outdated at this point), but its a little buggy when trying to support software written for X11

Can you think of a way to try to fix this within 14.04

Im thinking it might be something that is no longer compatible with 14.04, packages there are really old at this date

I installed 16.04. Same problem. Now what?

I thought maybe I needed to change Ubuntu's mouse/focus settings, but that didn't help.

Then I figured out that when I set minecraft to fullscreen:OFF, then it works fine (but when you fullscreen the window there's still a title bar all across the top). fullscreen:ON is when the problem occurs, minecraft steals the mouse so that if you ALT-TAB to any other app, you can roam the mouse, but not click on anything.