Toshiba A305-S6905 dual core laptop, 3gb ram
This laptop is left on most of the day and gets used mainly for web/email browsing. We close the lid when it is not in use to save battery power. Sometimes (maybe one out of 10 times) when we lift the screen to use it, the laptop becomes slow to respond. gkrellm reports 90 - 100% cpu usage on one cpu, always on CPU1.
There is no pattern that I can see. Sometimes it hibernates with firefox active, sometimes with no app active.
Running top when this occurs shows that only X and gkrellm are getting high cpu usage, and the only way to get out of this is to reboot, which can take 5 or 6 minutes.
I swapped out the HD and loaded a fresh install of 2010.12 and the problem persisted.
This never happened on PCLOS 2009.2 Maybe this is something related to KDE v4 ??