[Bug 112143] Built-in display corrupted after wake-up from S3 on Dell XPS 7390 2-in-1 (Ice Lake)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112143

--- Comment #6 from Andreas Kloeckner <inform at tiker.net> ---
Thanks for your help, all!

> If S3 is not the default state on your machine then I'm not sure we're supporting it.

It is not the default. However, S3 support appears perfect aside from this
issue--the machine is completely usable after resume on an externally attached
screen. Just the internal display does not come back.

> Could you also send a drm.debug=0x1e log that also contains the suspend/resume sequence messages?

The dmesg debug log I sent earlier contained a suspend/resume cycle:

https://gist.github.com/inducer/c0b8630adbdf4b9c0dae6c9f01819854

> Would you like to add i915.enable_psr=0 in cmdline in grub file?

With PSR disabled, the Dell logo does not get corrupted. It just stays in
place. However, the content of my desktop still does not reappear on the
built-in panel.

> Could you try if you also see the corruption when using the FB console (switching to it when you see the corruption and doing a suspend/resume from the console)?

FB console shows the same symptoms: external display comes back fine, internal
display stays on Dell logo (or its corrupted version, depending on PSR state).

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