So it's a regression between 12.04 (Linux v3.2) and 14.04 (Linux v3.13). Can you find the first -rc Linux kernel between 3.2 and 3.13 that causes the regression in [1]?
[1] http://kernel.ubuntu.com/~kernel-ppa/mainline/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1773643 Title: [Clevo W253EUQ] Turn on bluetooth with Fn+F12 not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1773643/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs