Ubuntu

How to debug Unity keyboard shortcuts?

Asked by Hadrien

I have a DVB tv stick and every time I change the channel with Kaffeine, Unity keyboard shortcuts do not work for 15 seconds. The shortcut is buffered though because after 15 seconds the action is done. For example it happens every time with audio volume keys.

I tried with Gnome desktop and the bug does not appears.

How can I find what is blocking Unity when I change a tv channel so I can fill a bug ticket? Is there any command I can use to diagnose the problem?

The problem appears after I installed 14.10

Question information

Language:
English Edit question
Status:
Solved
For:
Ubuntu Edit question
Assignee:
No assignee Edit question
Solved by:
Hadrien
Solved:
Last query:
Last reply:
Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#1

If you install xfce4 and use that instead of the default gnome (log off and change session to XFCE then log back in), is it ok there?

Revision history for this message
Hadrien (psydk) said : 		#2

I installed Xfce4 and as with Gnome, everything is working nice.

I also found another use case to reproduce the bug with Unity :
- open Firefox
- goto Youtube and play a video with the HTML5 player
- open a new tab (or switch tab)
- try to increase or decrease the volume with multimedia keys, or open a terminal with Ctrl+Alt+T
- nothing happens for 15 seconds
- the shortcut previously pressed has an effect

Alternate test :
- try to log off immediately after switching tab in Firefox and closing it. The log off will pause for 15 seconds.

Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#3

I suggest you report a bug with compiz. You can kick this off with:

ubuntu-bug compiz

Add all the details you have gained

Revision history for this message
Hadrien (psydk) said : 		#4

I tried with the Compiz version of Gnome and got the same result so you are probably right about the origin of the problem. I'll open that bug report.

Revision history for this message
Hadrien (psydk) said : 		#5

Strangely I cannot reproduce the problem now after I installed Xfce and had to fix the messed-up volume control as explained there: http://askubuntu.com/questions/451147/unity-notifications-messed-up-after-installing-gnome

Glad it is fixed but I still do not know how it occured at the first time.

Revision history for this message
Hadrien (psydk) said : 		#6

Not fixed actually, the bug is back :(