Re: RFC: fb restore on drm master close

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On Wed, Jan 04, 2017 at 12:38:04AM -0800, St??phane Marchesin wrote:
> On Wed, Jan 4, 2017 at 12:30 AM, Daniel Vetter <daniel@xxxxxxxx> wrote:
> > On Wed, Dec 21, 2016 at 12:13:06PM -0600, vcaputo@xxxxxxxxxxx wrote:
> >> Hello list,
> >>
> >> I've been playing with an unaccelerated drm program[1] and have been
> >> annoyed that whenever this program exits the fbcon isn't restored, with
> >> the display left completely off.
> >>
> >> This seems to happen because Xorg is still running from a different VT.
> >>
> >> Upon further investigation, it seems like the fb restore only occurs on
> >> "lastclose", which explains what I'm observing.
> >>
> >> Why don't we perform the fb restore whenever the current master is
> >> closed to cover this case, since masters are the ones that can change
> >> modes?
> 
> One case where it's useful not to do this is the handoff from a splash
> screen to a display server.
> 

If the handoff is avoiding the existing lastclose semantics somehow by
having overlapping opens, couldn't drmDropMaster() be employed to avoid
the masterclose restore when the splash screen closes?

Regards,
Vito Caputo
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