Having a look at this changelog: https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.7
Sounds a bit like the GPU hang and parser error in the kern.log snippet I posted originally. "... commit bb55569e6e1314a2df0108374c0f3c454b8f91af Author: Daniel Vetter <[email protected]> Date: Wed Apr 1 13:43:46 2015 +0200 drm/i915: Dont enable CS_PARSER_ERROR interrupts at all commit 37ef01ab5d24d1d520dc79f6a98099d451c2a901 upstream. We stopped handling them in commit aaecdf611a05cac26a94713bad25297e60225c29 Author: Daniel Vetter <[email protected]> Date: Tue Nov 4 15:52:22 2014 +0100 drm/i915: Stop gathering error states for CS error interrupts but just clearing is apparently not enough: A sufficiently dead gpu left behind by firmware (*cough* coreboot *cough*) can keep the gpu in an endless loop of such interrupts, eventually leading to the nmi firing. And definitely to what looks like a machine hang. Since we don't even enable these interrupts on gen5+ let's do the same on earlier platforms. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=93171 Tested-by: Mono <[email protected]> Tested-by: [email protected] Reviewed-by: Mika Kuoppala <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Signed-off-by: Jani Nikula <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> ..." On 19 May 2015 at 06:40, Bryan Cebuliak <[email protected]> wrote: > I installed the packages as you directed, Joseph Salisbury. The grub entry > was 3.19.0-17-generic. The boot stalled at the usual place. Something about > islice, as reported elsewhere in the ubuntu forum. My bug was not resolved > by this action. It was fixed by actions mentioned earlier in this thread. > > On 19 May 2015 at 03:04, Joseph Salisbury <[email protected]> > wrote: > >> This could be a duplicate of bug 1453593 and bug 1455575 >> >> Can you test the kernel located here and see if it resolves this bug: >> http://koti.kapsi.fi/~tjaalton/gm45 >> >> ** Tags added: kernel-da-key >> >> -- >> You received this bug notification because you are subscribed to the bug >> report. >> https://bugs.launchpad.net/bugs/1455852 >> >> Title: >> 15.04 will not boot on MacBook 2,1 >> >> To manage notifications about this bug go to: >> >> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1455852/+subscriptions >> > > ** Bug watch added: Linux Kernel Bug Tracker #93171 http://bugzilla.kernel.org/show_bug.cgi?id=93171 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1455852 Title: 15.04 will not boot on MacBook 2,1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1455852/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
