Johan Malm 175c20d954 Revert removal of automatic drm reset on VT switch ... ...on the basis that it reduces user-space breakage with respect to layer-shell clients disappearing on suspend/resume and on VT change. Revert the following two commits: - 1edd5e2 "backend/drm: Remove reset from interface" - 0f255b4 "backend/drm: Remove automatic reset on VT switch" This it not intended to be reverted on the `master` branch. Instead, the next wlroots release is anticipated to handle the situation differently, possibly by splitting some objects and leaving output-related wl_globals which have been announced to clients. See discussions on [issue-3944]. [issue-3944]: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3944#note_3030632 Background: With [MR-4878] on wlroots-0.19.0, the DRM backend destroys/recreates outputs on VT switch and in some cases on suspend/resume too. The reason for this change was that (i) the KMS state is undefined when a VT is switched away; and (ii) the previous outputs had issues with restoration, particularly when the output configuration had changed whilst switched away. This change causes two issues for users: - Some layer-shell clients do not re-appear on output re-connection, or may appear on a different output. Whilst this has always been the case, it will now also happen in said situations. It is technically possible for layer-shell clients to deal with this more thoughtfully by handling the new-output and surface-destroy signals to achieve desired behaviours, but such changes take time and meanwhile Desktop Environment teams and other users consider this a serious regression. - Some Gtk clients issue critical warnings on some compositors as they assume that at least one output is always available. This will be fixed in `Gtk-3.24.50` and is believed to be a harmless warning, [MR-4878]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4878 Testing: 1. This reversion has been tested with [conky] and [GlassyClock]. With the reversion applied, the clients remain visible after VT switching. 2. It was also tested with labwc on tty1; and sway on tty2. No adverse affects were observed when changing output scales on either compositor. [conky]: https://github.com/brndnmtthws/conky [GlassyClock]: https://github.com/tsujan/GlassyClock		2025-08-03 13:01:45 +01:00
..
drm.h	Revert removal of automatic drm reset on VT switch	2025-08-03 13:01:45 +01:00
fb.h	Fix/cleanup includes a bit	2025-04-15 20:13:29 +03:00
iface.h	Revert removal of automatic drm reset on VT switch	2025-08-03 13:01:45 +01:00
monitor.h	backend/drm: drop wl_display argument	2024-01-25 15:05:36 +00:00
properties.h	backend/drm: add support for explicit sync APIs	2024-08-06 17:37:06 +00:00
renderer.h	backend/drm: add explicit sync support to multi-GPU blits	2024-08-26 18:09:27 +02:00
util.h	backend/drm: drop SKIP in match_connectors_with_crtcs()	2024-08-21 22:25:19 +02:00