[Bug 107966] Graphical corruption with PSR - affects Plymouth only

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107966

--- Comment #17 from Tom Seewald <tseewald at gmail.com> ---
Potential workaround found:

Setting the kernel parameter i915.fastboot=1 (with i915.enable_psr=1) results
in no screen corruption in plymouth's LUKS prompt.  This appears to be
effective on both drm-tip and Fedora 29's 4.20.x kernel.  This issue was
reproducible on every boot, and so far I cannot reproduce the screen corruption
with fastboot enabled after 10+ boot cycles.

Any idea why fastboot has an effect on this?  I know that fastboot is likely to
be set by default on SKL+ in the next kernel release, but it's still a bit
strange that there's some interaction between psr and fastboot being disabled.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20190131/0b3fb977/attachment.html>