On 9/17/18 11:55 PM, zfnoctis(a)gmail.com wrote:
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 recommend that you report this with upstream so they can fix it.
https://bugs.freedesktop.org/enter_bug.cgi?product=DRI (DRM/intel)
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.
I've had it enabled on my Haswell Iris graphics laptop for a few years without any
issues. Granted the same code paths are not followed as with your hardware, but it
is working perfectly in some use cases.