Hi all,

I've installed the greate kde 4.5.1 provided in Kubuntu 10.10. All is working fine but I often have a strange bug.

So after a while after (between 10 minutes and 2 hours), I cannot make normal click anymore on the screen. Some key shortcut looks still working, I can use by example ALT+F4 to close Windows, or right click is working for a while. I if wait, it worses then right click become unusable.

I've tried to switch on terminal mode and tried to find which process causing this issue, but all looks fine, no zombie process, no strange process.

If I make a simple CTRL+ALT+SUPPR and make a simple logout then login, all come back and work good again.

I've checked logs but I don't see any strange error.

Somebody has an idea?

Thanks.

Olivier.

I suspect an application has captured Mouse Focus due to buggy behaviour. What applications do you have running when this occurs?

This bug appears not always with the same application. This issue can occured when I'm playing video, Internet browsing, with kmail and kopete opened in background. I have also only two additionnals widged running (the ball and the weather). Finally, I have enable some of compiz effect but no more, this installation is very clean and new, so I have absolutely no idea from why this problem comes.

In all case, many thanks for your answers.

Olivier

Same bug here on Slackware 13.1.

The problem occurs as soon as I boot into KDE and click something. I never use root in KDE, but yesterday I logged in as root to see if it was also affected and had the same problem as with my regular user account.

kwikness wrote:Same bug here on Slackware 13.1.

The problem occurs as soon as I boot into KDE and click something. I never use root in KDE, but yesterday I logged in as root to see if it was also affected and had the same problem as with my regular user account.

In my case, the problem comes never just after but often after 10~20 minutes.

Interesting. If you disable Desktop Effects / Compiz Compositing is there any change in behaviour?

I've founded a ppa with kde 4.5.2, and same problem.

I will try to disable the desktop effet and see if the problem still there.

This happens with me often with desktop effects enabled and Adobe Flash running. You could try also seeing if this fixes it when it occurs. Push alt-f2 (which should still work) and type

Code: Select all

kwin --replace

Let me know if this fixes it or not.

Problem still there, I tried to disabled all effect from control panel, and typed :

Code: Select all

kwin --replace
killall compiz compiz.real

But after a while, problem appears again.

If I try the commands during the bug, the problem is still there too.

Then I'd assume it's not the fault of the window manager. Which video card and driver are you using?

I'm using Nvidia Geforce 8800GTX with the proprietary drivers (installed by Ubuntu).

Just for your information, the computer was running under Linux Mint 8 (gnome) and was running without issue.

This bug is like if the keyboard and mouse cannot communicate anymore correctly with the interface, for me, it seems not to be a graphics drivers or interface issue.

olivierb wrote:This bug is like if the keyboard and mouse cannot communicate anymore correctly with the interface, for me, it seems not to be a graphics drivers or interface issue.

I second that. Pressing Alt+F2 temporarily resolves the issue-- until I click something. For me, it seems like some kind of focus issue.

Have you tried killing the web browsing process? This can be done by running "killall -9 <browser name".

"killall -9 opera" or "killall -9 konqueror" for instance

Yes, I tried many things, even try to switch in command line (CTRL+ALT+F1) then try to kill all opened application and suspected applications, but without success.

The only easiest way to go back to normal is press CTRL+ALT+SUPPR then logout and login back again.