Just a heads up that setting i915.enable_psr=1 causes my Dell Latitude 7490 (Intel UHD
620) to display graphical corruption *only* in Plymouth while entering in my drive's
password. I understand that PSR is currently not supported on Fedora, however it looks
like the Intel developers are planning to have it enabled by default next kernel
release[1] for Skylake and newer.
I have to say, PSR seems to be otherwise fully baked, once I'm past LUKS there are no
graphical issues at all. I can reproduce this on drm-intel-next and mainline, but I'm
not sure at this point if it's a problem with Plymouth or i915.
[1]
https://lists.freedesktop.org/archives/intel-gfx/2018-September/175255.html