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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #19 from Tom Seewald <tseewald at gmail.com> ---
(In reply to Dhinakaran Pandiyan from comment #18)
A quick
> way to verify would be to check i915_edp_psr_status or dmesg with
> drm.debug=14 at Plymouth's login. And compare this to a boot without
> i915.fastboot=1. Can you please attach dmesg for the both test cases?

What is the best way/is it possible to capture dmesg and check
/sys/kernel/debug/dri/ values at the Plymouth LUKS prompt? This is relatively
early in the boot process, before I have entered in the decryption password for
my drive.

I have verified however, that after the boot process has completed psr appears
to be enabled both with fastboot on and off.

> Btw, you shouldn't be needing i915.enable_psr=1 on drm-tip. PSR should be
> enabled by default on a KBL refresh.

Thanks, I can confirm that on drm-tip without explicitly setting
i915.enable_psr=1 I have graphical corruption while typing in my LUKS password
at the plymouth prompt.

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