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systemd/0004-logind-Do-not-fail-display-count-if-a-device-has-no-.patch

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From 94036de887ad5b0dc805abe38b5c1c58b57d9465 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mantas=20Mikul=C4=97nas?= <grawity@gmail.com>
Date: Tue, 11 Mar 2014 17:49:00 +0200
Subject: [PATCH] logind: Do not fail display count if a device has no parent
udev_device_get_parent() may return NULL when the device doesn't have a
parent, as is the case with (for example) /sys/devices/virtual/drm/ttm.
Also, log an actual error message instead of "-12 displays connected".
---
src/login/logind-action.c | 4 +++-
src/login/logind-core.c | 2 +-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git src/login/logind-action.c src/login/logind-action.c
index ae7b350..1928f43 100644
--- src/login/logind-action.c
+++ src/login/logind-action.c
@@ -84,7 +84,9 @@ int manager_handle_action(
* treat like this under the assumption that there is
* no modern drm driver available. */
n = manager_count_displays(m);
- if (n != 1) {
+ if (n < 0)
+ log_warning("Display counting failed: %s", strerror(-n));
+ else if (n != 1) {
log_debug("Ignoring lid switch request, %i displays connected.", n);
return 0;
}
diff --git src/login/logind-core.c src/login/logind-core.c
index ca34d37..053d2ed 100644
--- src/login/logind-core.c
+++ src/login/logind-core.c
@@ -520,7 +520,7 @@ int manager_count_displays(Manager *m) {
p = udev_device_get_parent(d);
if (!p)
- return -ENOMEM;
+ continue;
/* If the parent shares the same subsystem as the
* device we are looking at then it is a connector,
--
1.7.9.2