Aha! With that extra bit of information this looks to be upstream bug: https://bugs.freedesktop.org/show_bug.cgi?id=29173 which has just got an upstream fix http://git.kernel.org/?p=linux/kernel/git/ickle/drm-intel.git;a=commit;h=71c831d2cce539e0ee8e3b3fadae49355867efc2 .
Moving to the kernel, assigning jfo to ensure this gets looked at before kernel freeze.
Aha! With that extra bit of information this looks to be upstream bug: https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 29173 which has just got an upstream fix http:// git.kernel. org/?p= linux/kernel/ git/ickle/ drm-intel. git;a=commit; h=71c831d2cce53 9e0ee8e3b3fadae 49355867efc2 .
Moving to the kernel, assigning jfo to ensure this gets looked at before kernel freeze.