Resume without drm driver results in black screen

[Johannes Lundberg]

Hi

I revived this old bug
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213501

Considering this also affects all X users using scfb driver it's worth
investigating.
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[John Baldwin]

On 5/17/18 3:01 AM, Johannes Lundberg wrote:
> Hi
>
> I revived this old bug
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213501
>
> Considering this also affects all X users using scfb driver it's worth
> investigating.

It's just not doable. You need some sort of driver for the GPU that knows
how to turn the display back on. That isn't a portable thing, it's GPU-specific.
You could perhaps write smaller drivers that only support resume and not
graphics acceleration, but that doesn't seem trivial.

--
John Baldwin