[Bug 109530] [CI][BAT] igt at gem_exec_suspend@basic-s3 - dmesg-warn - *ERROR* failed to enable link training

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109530

--- Comment #2 from Imre Deak <imre.deak at intel.com> ---
The problem is that the eDP panel is used as a DP output (due to the lack of a
correct VBT). That in turn means we'll not enable VDD (which is an eDP specific
thing). That is most probably the reason for the link training failure for
which we normally keep VDD enabled. The problem only triggers after an S3
suspend/resume cycle because before that we happen to have VDD enabled, left as
such by BIOS.

I think we shouldn't add more hacks for systems without VBT to fix this, rather
wait for the VBT fix itself.

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