This bug can make machines that include the affected graphics card completely unusable.
The bad commit has been identified here by Vagrant, and independently by several other people. It was already reverted in the 4.9.66 upstream release:
commit aa8f1adcf964a8f2ebd0c709a308d26dd4b9863b
Date: Tue Nov 28 10:15:23 2017 +0100
Revert "drm/i915: Do not rely on wm preservation for ILK watermarks"
This reverts commit 7de694782cbe7840f2c0de6f1e70f41fc1b8b6e8 which is
commit 8777b927b92cf5b6c29f9f9d3c737addea9ac8a7 upstream.
It was reported to cause flickering and other regressions.
Any chance we can get a new kernel without that commit?
Thanks!