diff -Nru upower-0.99.4/debian/changelog upower-0.99.4/debian/changelog
--- upower-0.99.4/debian/changelog	2016-09-19 16:55:05.000000000 +0300
+++ upower-0.99.4/debian/changelog	2019-01-28 13:24:35.000000000 +0300
@@ -1,3 +1,10 @@
+upower (0.99.4-4+deb9u1) stretch; urgency=medium
+
+  * Non-maintainer upload.
+  * Add patch to fix excessive CPU usage when /proc/timer_stats doesn't exist.
+
+ -- Vlad Orlov <monsta@inbox.ru>  Mon, 28 Jan 2019 13:24:35 +0300
+
 upower (0.99.4-4) unstable; urgency=medium
 
   * Install typelib files into multiarch paths.
diff -Nru upower-0.99.4/debian/patches/fix-cpu-usage-without-proc-timer-stats.patch upower-0.99.4/debian/patches/fix-cpu-usage-without-proc-timer-stats.patch
--- upower-0.99.4/debian/patches/fix-cpu-usage-without-proc-timer-stats.patch	1970-01-01 03:00:00.000000000 +0300
+++ upower-0.99.4/debian/patches/fix-cpu-usage-without-proc-timer-stats.patch	2019-01-28 13:23:02.000000000 +0300
@@ -0,0 +1,42 @@
+From 798588a480eaae50368bed75fc78f8314523b2a3 Mon Sep 17 00:00:00 2001
+From: Richard Hughes <richard@hughsie.com>
+Date: Sun, 23 Apr 2017 20:22:02 +0100
+Subject: Do not spin in a loop when /proc/timer_stats cannot be written
+
+Only set up the polling once the write has succeeded.
+
+Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=100626
+---
+ src/up-wakeups.c | 12 +++++++-----
+ 1 file changed, 7 insertions(+), 5 deletions(-)
+
+Index: upower-0.99.4/src/up-wakeups.c
+===================================================================
+--- upower-0.99.4.orig/src/up-wakeups.c
++++ upower-0.99.4/src/up-wakeups.c
+@@ -626,6 +626,13 @@ up_wakeups_timerstats_enable (UpWakeups
+ 
+ 	g_debug ("enabling timer stats");
+ 
++	/* enable timer stats */
++	file = fopen (UP_WAKEUPS_SOURCE_USERSPACE, "w");
++	if (file == NULL)
++		return FALSE;
++	fprintf (file, "1\n");
++	fclose (file);
++
+ 	/* setup polls */
+ 	wakeups->priv->poll_kernel_id =
+ 		g_timeout_add_seconds (UP_WAKEUPS_POLL_INTERVAL_KERNEL,
+@@ -637,11 +644,6 @@ up_wakeups_timerstats_enable (UpWakeups
+ 				       (GSourceFunc) up_wakeups_poll_userspace_cb, wakeups);
+ 	g_source_set_name_by_id (wakeups->priv->poll_userspace_id, "[upower] up_wakeups_poll_userspace_cb");
+ 
+-	file = fopen (UP_WAKEUPS_SOURCE_USERSPACE, "w");
+-	if (file == NULL)
+-		return FALSE;
+-	fprintf (file, "1\n");
+-	fclose (file);
+ 	wakeups->priv->polling_enabled = TRUE;
+ 	return TRUE;
+ }
diff -Nru upower-0.99.4/debian/patches/series upower-0.99.4/debian/patches/series
--- upower-0.99.4/debian/patches/series	2016-09-19 16:55:05.000000000 +0300
+++ upower-0.99.4/debian/patches/series	2019-01-28 13:22:57.000000000 +0300
@@ -3,3 +3,4 @@
 lib-Add-proper-error-and-cancellable-handling-to-UpC.patch
 lib-Remove-hidden-singleton-instance.patch
 up-tool-Exit-early-when-connecting-to-upower-fails.patch
+fix-cpu-usage-without-proc-timer-stats.patch