powerd crash

Left phone on overnight, when I came down this morning it was warm and I couldn't wake it from the power button, and adb shell didn't work, but hung. Had to reboot the phone hard, and then shell in and see this from 2 hours ago in the syslog:-

Apr 7 06:34:45 ubuntu-phablet kernel: [37529.329095] healthd: battery l=100 v=4336 t=32.9 h=2 st=5 c=11 chg=u
Apr 7 06:34:55 ubuntu-phablet kernel: [37539.327874] healthd: battery l=100 v=4336 t=32.9 h=2 st=5 c=6 chg=u
Apr 7 06:35:05 ubuntu-phablet kernel: [37549.326348] healthd: battery l=100 v=4336 t=32.9 h=2 st=5 c=115 chg=u
Apr 7 06:35:15 ubuntu-phablet kernel: [37559.328942] healthd: battery l=100 v=4337 t=32.9 h=2 st=5 c=0 chg=u
Apr 7 06:35:19 ubuntu-phablet kernel: [37563.392791] healthd: battery l=100 v=4337 t=32.9 h=2 st=5 c=0 chg=u
Apr 7 06:35:25 ubuntu-phablet kernel: [37569.330407] healthd: battery l=100 v=4338 t=33.0 h=2 st=5 c=-1 chg=u
Apr 7 06:35:26 ubuntu-phablet kernel: [37569.853282] send sigkill to 30501 (upowerd), adj 0, size 1005
Apr 7 06:35:35 ubuntu-phablet kernel: [37579.325799] healthd: battery l=100 v=4336 t=33.0 h=2 st=5 c=-1 chg=u
Apr 7 06:35:45 ubuntu-phablet kernel: [37589.325982] healthd: battery l=100 v=4337 t=33.0 h=2 st=5 c=0 chg=u
Apr 7 06:35:55 ubuntu-phablet kernel: [37599.363918] healthd: battery l=100 v=4327 t=33.0 h=2 st=5 c=66 chg=u
Apr 7 06:36:05 ubuntu-phablet kernel: [37609.325982] healthd: battery l=100 v=4338 t=33.0 h=2 st=5 c=-1 chg=u
Apr 7 06:36:15 ubuntu-phablet kernel: [37619.335931] healthd: battery l=100 v=4336 t=33.0 h=2 st=5 c=3 chg=u
Apr 7 06:36:19 ubuntu-phablet kernel: [37623.428072] healthd: battery l=100 v=4336 t=33.0 h=2 st=5 c=17 chg=u
Apr 7 06:36:25 ubuntu-phablet kernel: [37629.326226] healthd: battery l=100 v=4337 t=33.0 h=2 st=5 c=-1 chg=u
Apr 7 06:36:35 ubuntu-phablet kernel: [37639.331048] healthd: battery l=100 v=4336 t=33.0 h=2 st=5 c=-1 chg=u
Apr 7 06:36:35 ubuntu-phablet kernel: [37639.558242] send sigkill to 30588 (powerd), adj 0, size 468
Apr 7 06:36:35 ubuntu-phablet kernel: [37639.604907] init: powerd main process (30588) killed by KILL signal
Apr 7 06:36:35 ubuntu-phablet kernel: [37639.604968] init: powerd main process ended, respawning
Apr 7 06:36:37 ubuntu-phablet powerd[5715]: Initializing powerd.
Apr 7 06:36:37 ubuntu-phablet powerd[5715]: Running on mako
Apr 7 06:36:38 ubuntu-phablet dbus[30442]: [system] Activating service name='org.freedesktop.UPower' (using servicehelper)
Apr 7 06:36:38 ubuntu-phablet dbus[30442]: [system] Successfully activated service 'org.freedesktop.UPower'
Apr 7 06:36:44 ubuntu-phablet powerd[5715]: signalling activity via HAL
Apr 7 06:36:44 ubuntu-phablet powerd[5715]: screen power setting failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name com.canonical.Unity.Screen was not provided by any .service files
Apr 7 06:36:44 ubuntu-phablet powerd[5715]: signalling activity via HAL
Apr 7 06:36:44 ubuntu-phablet kernel: [37648.144385] request_suspend_state: wakeup (0->0) at 37646856728712 (2014-04-07 05:36:44.303971064 UTC)
Apr 7 06:36:44 ubuntu-phablet powerd[5715]: screen power setting failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name com.canonical.Unity.Screen was not provided by any .service files
Apr 7 06:36:44 ubuntu-phablet powerd[5715]: ofono_get_modems_cb: call error
Apr 7 06:36:45 ubuntu-phablet kernel: [37649.350978] healthd: battery l=100 v=4317 t=33.0 h=2 st=5 c=38 chg=u
Apr 7 06:36:55 ubuntu-phablet kernel: [37659.340143] healthd: battery l=100 v=4335 t=33.0 h=2 st=5 c=0 chg=u
Apr 7 06:36:58 ubuntu-phablet kernel: [37662.558333] send sigkill to 5734 (upowerd), adj 0, size 1066
Apr 7 06:36:59 ubuntu-phablet kernel: [37663.588518] send sigkill to 5715 (powerd), adj 0, size 764
Apr 7 06:37:00 ubuntu-phablet kernel: [37664.128759] init: powerd main process (5715) killed by KILL signal
Apr 7 06:37:00 ubuntu-phablet kernel: [37664.128820] init: powerd main process ended, respawning
Apr 7 06:37:01 ubuntu-phablet powerd[5929]: Initializing powerd.
Apr 7 06:37:01 ubuntu-phablet powerd[5929]: Running on mako

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: powerd 0.14+14.04.20140401-0ubuntu1
Uname: Linux 3.4.0-5-mako armv7l
ApportVersion: 2.14.1-0ubuntu1
Architecture: armhf
Date: Mon Apr 7 08:18:55 2014
InstallationDate: Installed on 2014-04-06 (1 days ago)
InstallationMedia: Ubuntu Trusty Tahr (development branch) - armhf (20140406)
SourcePackage: powerd
UpgradeStatus: No upgrade log present (probably fresh install)