Update from my side (see my contributions above): after several
successful starts with kernel 3.11 instead of 3.13 I experienced a
completely new and unexpected behavior: the WiFi device was switched off
by software during boot and wasn't available anymore, even after a
reboot. I had to go to the
Maybe this helps: I came from 13.10 to 14.04 (upgrade path) and after
upgrading I was left with Kernel 3.11 (no upgrade to 3.13). The wireless
network worked for me after a reboot.
Then I updated from Kernel 3.11 to the generic kernel 3.13 as supplied
by 14.04 and after I rebooted I didn't have
As I wrote above, the problems started during the upgrade from 13.10 --
14.04 but not before the upgrade from kernel 3.11 (as in saucy) to 3.13
(as in trusty). Kernel 3.11 from 13.10 works under 14.04 without
problems!
While the lsmod output states that all relevant kernel modules
