I currently have Ubuntu 13.10. At some point the default shortcuts Shift+Prn and Ctrl+Shift+Prn stopped working.
Simply pressing Prn (captures the entire screen) works, pressing Alt+Prn to capture only active window works as well, only the shortcut for area clipping doesn't work for some reason.
Some more facts:
- Manually running
gnome-screenshot -aworks as expected!
- Changing the action to another key combo doesn't help
- Disabling the action and instead adding a custom shortcut with the command
gnome-screenshot -aas answered here doesn't help either
Here's a screenshot of my keyboard settings:
P.S. In CompizConfig Settings Manager, the
Commands plugin is turned off
UPDATE @falconer's answer has helped locate the problem, here's the output of a script that simulates key presses and dumps programs that intercept them:
$ xdotool keydown "shift+Print"; xdotool key "XF86LogGrabInfo"; xdotool keyup "Print"; sleep 1; xdotool keyup "shift"; tail /var/log/Xorg.0.log [ 25474.641] (II) Printing all currently active device grabs: [ 25474.641] Active grab 0x4220d336 (core) on device 'Virtual core keyboard' (3): [ 25474.641] client pid 2196 xneur [ 25474.641] at 25474411 (from passive grab) (device thawed, state 1) [ 25474.641] core event mask 0x3 [ 25474.641] passive grab type 2, detail 0x0, activating key 50 [ 25474.641] owner-events false, kb 1 ptr 1, confine 0, cursor 0x0 [ 25474.641] (II) End list of active device grabs
It's obvious from this log that in my case it was xneur (keyboard layout switcher program).
Mand it worked! But it's not the keyboard (my laptop if fairly new), I can assign it back to Ctrl+Shift+Prn or another 3 button combo so the keyboard AND the OS do register it. Any ideas on what might be causing the issue?
Take a screenshot of an area, it was originally
Shift+Print, I was just experimenting. Updated the screenshot now