3.11.2-200.fc19.x86_64: random problem with ath9k got worser
please take a look at https://bugzilla.redhat.com/show_bug.cgi?id=1013054
especially the changes in 3.11.2 and that it happened exactly 24 hours
later again while my personal machine until yesterday was not affected
https://bugzilla.redhat.com/show_bug.cgi?id=1013054#c2