[Intel-gfx] [PATCH 2/2] drm/i915: Don't reprobe on resume

[Rui Tiago Cação Matos]

On Thu, Jul 16, 2015 at 5:32 PM, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> On Thu, Jul 16, 2015 at 04:47:51PM +0200, Daniel Vetter wrote:
>> If we don't force the connector state to unknown there's no reason any
>> more to force a reprobe. Also no other driver bothers with this, so
>> probably it's not required - userspace handles lid/resume events
>> through other channels already.
>
> No, we don't. We don't synthesize any events at all for changing
> connectors whilst suspended

I haven't tried this patch yet but note that even the current kernel
(4.1.2) isn't sending HOTPLUG uevents out in precisely that case. It
would be nice if that got fixed.

> userspace doesn't know about being
> suspended.

For GNOME, we just rely on systemd to suspend so we do know when we
resume and we can easily trigger a reprobe then. It's up to you to
decide if this should be left to userspace but please
advertise/document it clearly.

Thanks,
Rui