On 15.12.2014, Daniel Vetter wrote:
Can you please boot with drm.debug=0xf on both good and bad kernels and then grab dmesg from each?
The output is attached. The dmesg log stops after runlevel 3 for the 3.18 kernel, because I'm not able to do anything in runlevel 5 with a black screen.
To make sure we don't forget this please file the above summary plus dmesg files as a new bug against dri -> drm(intel) on bugs.freedesktop.org. Please add "[ilk bisected]" to the bug summary so it shows up in all the right searches for us.
Will do.