Comment 15 for bug 1680904

I've experienced apparently random freezes on 17.04 (kernel 4.10.0-21). It appears to happen when Chrome is active, although Chrome is probably active all the time. There's nothing out of the ordinary in kern.log, but syslog has:

May 23 12:44:34 thornback unity-panel-ser[2612]: menus_destroyed: assertion 'IS_WINDOW_MENU(wm)' failed
May 23 12:44:34 thornback compiz[2603]: WARN 2017-05-23 12:44:34 unity.glib.dbus.proxy GLibDBusProxy.cpp:487 Calling method "EmitEvent" on object path: "/com/ubuntu/Upstart" failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name com.canonical.Unity.Test.Upstart was not provided by any .service files
May 23 12:44:34 thornback systemd[2058]: Stopped target A target that, when running, represents the screen being locked.
May 23 12:44:34 thornback systemd[2058]: Stopping Backing Service for the Unity Panel in Lockscreen mode...
May 23 12:44:35 thornback systemd[2058]: Stopped Backing Service for the Unity Panel in Lockscreen mode.
May 23 12:44:37 thornback systemd-resolved[1197]: Grace period over, resuming full feature set (UDP+EDNS0+DO+LARGE) for DNS server 192.168.0.254.
May 23 12:44:37 thornback systemd-resolved[1197]: Using degraded feature set (UDP) for DNS server 192.168.0.254.
May 23 12:44:37 thornback compiz[2603]: [4773:4773:0523/124437.777470:ERROR:gpu_child_thread.cc(324)] Exiting GPU process due to errors during initialization

I also notice that there are a number of lines containing:
compiz[2237]: [1:1:0522/101734.457030:ERROR:KeyboardEventManager.cpp(427)] Not implemented reached in static bool blink::KeyboardEventManager::currentCapsLockState()