Package: lightdm
Version: 1.18.3-5
Severity: normal
Tags: patch upstream
If one seat of multiseat setup is not configured properly, lightdm restarts
it in a endless loop, consuming up to 100% CPU and polluting logs.
Including a patch that adds half a second delay before a greeter restart.
-- System Information:
Debian Release: 9.5
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.15.0-0.bpo.2-amd64 (SMP w/8 CPU cores)
Locale: LANG=ru_RU.utf8, LC_CTYPE=ru_RU.utf8 (charmap=UTF-8), LANGUAGE=ru_RU:ru
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages lightdm depends on:
ii adduser 3.115
ii consolekit 0.4.6-6
ii dbus 1.10.26-0+deb9u1
ii debconf [debconf-2.0] 1.5.61
ii libaudit1 1:2.6.7-2
ii libc6 2.24-11+deb9u3
ii libgcrypt20 1.7.6-2+deb9u3
ii libglib2.0-0 2.50.3-2
ii libpam-systemd 237-3~bpo9+1
ii libpam0g 1.1.8-3.6
ii libxcb1 1.12-1
ii libxdmcp6 1:1.1.2-3
ii lightdm-gtk-greeter [lightdm-greeter] 2.0.2-1
ii lsb-base 9.20161125
Versions of packages lightdm recommends:
ii xserver-xorg 1:7.7+19
Versions of packages lightdm suggests:
ii accountsservice 0.6.43-1
ii upower 0.99.4-4+b1
pn xserver-xephyr <none>
-- Configuration Files:
/etc/lightdm/lightdm.conf changed:
[LightDM]
logind-load-seats=true
[Seat:*]
[Seat:seat-1]
xserver-config=/etc/X11/xorg.conf.seat-1
[Seat:seat-2]
xserver-config=/etc/X11/xorg.conf.seat-2
xserver-command=/usr/local/bin/Xintel
[XDMCPServer]
[VNCServer]
-- debconf information:
* shared/default-x-display-manager: lightdm
lightdm/daemon_name: /usr/sbin/lightdm
Description: fix high CPU usage on partially configured multiseat
If one seat of multiseat setup is not configured properly, lightdm restarts
it in a endless loop, consuming up to 100% CPU and polluting logs. This fix
adds a half second delay before a greeter restart.
.
lightdm (1.18.3-5) experimental; urgency=medium
.
* debian/control:
- add liblightdm-qt5-3-0 and liblightdm-qt5-3-dev (packaging bits imported
from Ubuntu) closes: #871840
- add build-dep on qtbase5-dev
- move libraries to section libs
- update standards version to 4.1.0
- replace dh-systemd build-dep by a newer version of debhelper
* debian/liblightdm-qt5-3-0.install and debian/liblightdm-qt5-3-dev.install
added to ship relevant files to Qt5 library and development packages
* debian/liblightdm-qt-dev.install:
- narrow installation path to only cover Qt4 library.
* debian/rules:
- explicitly enable qt5 library
Author: Yves-Alexis Perez <cor...@debian.org>
Bug-Debian: https://bugs.debian.org/871840
---
The information above should follow the Patch Tagging Guidelines, please
checkout http://dep.debian.net/deps/dep3/ to learn about the format. Here
are templates for supplementary fields that you might want to add:
Origin: <vendor|upstream|other>, <url of original patch>
Bug: <url in upstream bugtracker>
Bug-Debian: https://bugs.debian.org/<bugnumber>
Bug-Ubuntu: https://launchpad.net/bugs/<bugnumber>
Forwarded: <no|not-needed|url proving that it has been forwarded>
Reviewed-By: <name and email of someone who approved the patch>
Last-Update: 2018-10-01
--- lightdm-1.18.3.orig/src/seat.c
+++ lightdm-1.18.3/src/seat.c
@@ -1,3 +1,4 @@
+
/*
* Copyright (C) 2010-2011 Robert Ancell.
* Author: Robert Ancell <robert.anc...@canonical.com>
@@ -434,6 +435,20 @@ check_stopped (Seat *seat)
}
}
+
+static gboolean
+call_seat_switch_to_greater(gpointer data)
+{
+ Seat *seat = (Seat *)data;
+ if(!seat_switch_to_greeter(seat))
+ {
+ l_debug (seat, "Stopping; failed to start a greeter");
+ seat_stop (seat);
+ }
+ return FALSE;
+}
+
+
static void
display_server_stopped_cb (DisplayServer *display_server, Seat *seat)
{
@@ -489,12 +504,9 @@ display_server_stopped_cb (DisplayServer
active_session = seat_get_active_session (seat);
if (!active_session || session_get_display_server (active_session) ==
display_server)
{
- l_debug (seat, "Active display server stopped, starting greeter");
- if (!seat_switch_to_greeter (seat))
- {
- l_debug (seat, "Stopping; failed to start a greeter");
- seat_stop (seat);
- }
+ l_debug (seat, "Active display server
stopped, starting greeter again after delay");
+ g_timeout_add(500, call_seat_switch_to_greater, (gpointer)seat);
+
}
}
