Bug 95186

Summary:	VT-switching on fbdev-backend goes unnoticed with logind
Product:	Wayland	Reporter:	Pekka Paalanen <ppaalanen>
Component:	weston	Assignee:	Wayland bug list <wayland-bugs>
Status:	RESOLVED MOVED	QA Contact:
Severity:	normal
Priority:	medium	CC:	dh.herrmann
Version:	unspecified
Hardware:	Other
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Pekka Paalanen 2016-04-28 13:30:00 UTC

Using a systemd system with logind, DRM-backend works just fine with VT-switching, responding with device_paused() and device_resumed() on the DRM device.

On fbdev-backend, VT-switch away from Weston does happen, but Weston is not notified about it at all. This leads to Weston painting over a VT not its own, and probably still getting input, etc. Switching back to Weston's VT freezes the VT completely, until Weston is killed. Killing returns the VT back to normal.

parse_active() never gets called, and indeed property_changed() is never called.

All these functions are in src/launcher-logind.c.

Presumably the rpi-backend suffers the same, did not test.

Comment 1 Pekka Paalanen 2016-04-28 13:56:32 UTC

My systemd is version 226.

I tried weston 1.6.91 and even that fails today, even though it is right after David Herrmann's fixes to weston's vt-switching for non-drm backends.

I suspect this might be a logind regression instead.

Unfortunately I can't point a systemd version where this worked last. This might even be the first time I try weston with logind and fbdev.

Comment 2 Pekka Paalanen 2016-04-28 14:22:46 UTC

Actually, I think the reason why switching back to weston's VT gets stuck is that logind does revoke input devices from weston on switch-out, but weston never tries to get them back on switch in, as neither switch-out or switch-in are signalled in weston.

Quentin says he has systemd 229 and cannot reproduce the issue, though he says he has some stuff running that might interfere.

Comment 3 GitLab Migration User 2018-06-08 23:54:39 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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