[Bug 101745] [SKL] SYSTEM HANG on boot-up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101745

--- Comment #5 from Didier G <didierg-divers at orange.fr> ---
According https://bugzilla.redhat.com/show_bug.cgi?id=1463085 and
https://bugzilla.kernel.org/show_bug.cgi?id=196233 it seems this problem is
reported only on Asus laptop UX305UA, UX305U and UX306U

In my case I have UX305UA and I did not have any problem with kernel 4.11.4 and
previous. The problem has been introduced by kernel 4.11.5 and following. I am
affirmative about that.

I attach journalctl of failing boot with kernel 4.11.12 with parameter
drm.debug=0xe on grub boot options.

Message "[drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 31: Can't
calculate constants, dotclock = 0!" is present since 4.11.5

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