[Solved] System slows down when charging

My laptop battery got to a really low level (<5%), but it was working smoothly, until I plugged in the charger: after that, the system got sluggish (usable, but VERY annoying). I suspect this is related to the graphics card/driver (Intel/i915). By watching the output of top, there was a kworker process using consistently over 40% CPU (despite starting with a K, from what I could glean, this has nothing to do with KDE). Once the battery got over 90% (approx.), the system got usable again. Is this some misconfiguration issue? Bug? PEBKAC?
Last edited by gauthma (2012-01-24 15:25:16)

That does seem weird. In fact its the first time I heard something like that. Was there some CPU intensive operations that you were performing along with the charging?
An interesting test would be to see if it happens again and consistently so. Try to discharge your battery to 10% and then put it back on charge to see what is going on. Maybe post your dmesg at that time and your Xorg.log (although at this point I am not quite sure what we will find)
A basic google search for kworker yields this :
http://www.google.com/search?sourceid=c … is+kworker
kworker seems to be some kind of indexing service. Disabling nepomuk might be one option as described here

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