Latests kernel freeze on boot
Sometimes the .39-rc1+ freeze too, but after one reboot start normaly.
The message appear from drm-intel+ kernel is :
GMBUS timed out falling back to bit banging on pin 0 [i915] GMBUS disabled GMBUS timed out falling back to bit banging on pin 6 [i915] GMBUS reserved GMBUS timed out falling back to bit banging on pin 7 [i915] GMBUS dpd
and remove the i915.modeset=1 from boot param