Oleksij, could you please retest with the latest drm-intel-nightly? Since your last report there has been link training and IRQ handling fixes that could have solved your problem.
The WARN in your dmesg is the same as in bug#51983, so if that's the only remaining issue you see, I'll set this as a duplicate of that.
(In reply to comment #99)
Oleksij, could you please retest with the latest drm-intel-nightly? Since your last report there has been link training and IRQ handling fixes that could have solved your problem.
The WARN in your dmesg is the same as in bug#51983, so if that's the only remaining issue you see, I'll set this as a duplicate of that.