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backend/drm: ignore hotplug events while inactive

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When the session is inactive, we can't change the KMS state. Ignore
hotplug events so that compositors don't try to perform a modeset when
a connector is plugged in. We already re-scan connectors when the
session becomes active.

To test, run a wlroots compositor on VT 1, switch to VT 2, unplug a
connector, re-plug it, switch back to VT 1. Without this patch the
screen is black on VT 1.

References: https://github.com/swaywm/wlroots/issues/2370
This commit is contained in:
Simon Ser 2020-12-26 11:42:23 +01:00
parent eb30cde777
commit 576ff57db0
1 changed files with 4 additions and 1 deletions
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5
backend/drm/backend.c
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@ -109,8 +109,11 @@ static void handle_session_active(struct wl_listener *listener, void *data) {
static void handle_dev_change(struct wl_listener *listener, void *data) { static void handle_dev_change(struct wl_listener *listener, void *data) {
struct wlr_drm_backend *drm = wl_container_of(listener, drm, dev_change); struct wlr_drm_backend *drm = wl_container_of(listener, drm, dev_change);
wlr_log(WLR_DEBUG, "%s invalidated", drm->name); if (!drm->session->active) {
return;
}
wlr_log(WLR_DEBUG, "%s invalidated", drm->name);
scan_drm_connectors(drm); scan_drm_connectors(drm);
} }