On 2020-02-07 10:48, Pavel Zakharov wrote: > I haven’t yet tried rebuilding the kernel with the patch reverted,> but that is the next step I’m planning to try once I figure out how > to do it. Hi Pavel, How about verifying as follows whether that patch is the root cause: git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-kernel && cd linux-kernel && git revert 83f85b8ec305 and next configure, build and install the kernel, reboot and rerun your test. Thanks, Bart.