Got to the bottom of this: root cause was a heavily hacked version of BCMWL (6.20) which I manually introduced in Trusty due to the severe shortcomings / instability of both the FOSS b43 driver and the repo version of Broadcoms hybrid driver (which I think was version 6.30 at the time). A re-installation of the relevant broadcom-sta packages from the Vivid repo fixed this problem and reintroduced stability for the kernel once again.
BTW: The DKMS version of the package broadcom-sta-dkms doesn't compile on the Vivid stock kernel (3.19.0-15), due to header incompatibilities, I'll open a new bug report for this. Let me know if I should do the same on kernel.org. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1448458 Title: 3.19.15 crashes on MBP 8,1 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1448458/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs