Comment 1 for bug 1605937

Similar behaviour here. My laptop fan is going mad.

Laptop on a docking station, secondary monitor set to primary, wingpanel lives on it when docked.

Nvidia 340 graphics driver.

Every time I walk away from my pc and come back, wingpanel is unresponsive and consuming 100% of cpu. Killing wingpanel causes it to relaunch and cpu usage goes down, but only temporarily.

Seems to lock up when the displays go to sleep, but I can't state that it never happens if kept awake for a fact.

I am not experiencing wingpanel stealing focus though. Before I determined the issue was wingpanel I would work normally, although my pc was slow, and only notice it when I tried to adjust the volume and found wingpanel unresponsive.