Hi,
I've got the following odd issue: when starting a program which includes a file browser component (dolphin, gwenview, ...) I sometimes get terrible lags, with the mouse cursor barely movable. Running "top" on a VT shows _two_ X servers running, one of which is using 90-99% of CPU power. The second instance of X continuously changes PID every 5 secs or so. This also sometimes happens when resuming from suspend. I suspect this all has something to do with a CIFS mount I access occasionally at work, since it does not happen after a clean reboot at home. Also, the lags appear to get worse with time, i.e. every time I open dolphin for instance, the lags last a bit longer, until the session never recovers and I have to kill X.

My questions:
- Is there a way to explicity unmout the CIFS mount in dolphin (similarly to how one can do it via gvfs?), as a first debugging step?
- Or is there any other way I can debug this? Logs do not include anything interesting.

I'm using KDE 4.7.3 as available from the testing repository of Fedora 16, which uses kernel-3.1.2 and xorg-x11-server-Xorg-1.11.2. Though likely irrelevant (the issue does not depends on compositing being active), graphics are handled by a Intel GM45 with mesa 7.11.2.

Thanks for any suggestions!