Niko Nieminen, thank you for reporting this and helping make Ubuntu better.
Could you please test the latest upstream kernel available from the very top
line at the top of the page (not the daily folder) following
https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional
upstream
Before I posted this bug I had rebooted my Dell and with charging cable
plugged in I had wifi working for about 2 hours till it suddenly dropped
again and I got the following loop in my syslog:
http://paste.ubuntu.com/7681759/
I watched the loop for about 5 minutes and because it didn't seem to