Well, I am not sure if the warning and the error in the kodi.log has anything in common with the repeating restarts, but they are at the moment the only possible causes I can see, so here it is:
12:13:32 T:1961226240 NOTICE: special://profile/ is mapped to: special://masterprofile/
12:13:32 T:1961226240 NOTICE: -----------------------------------------------------------------------
12:13:32 T:1961226240 NOTICE: Starting Kodi (14.2 Git:Unknown). Platform: Linux ARM 32-bit
12:13:32 T:1961226240 NOTICE: Using Release Kodi x32 build (version for Raspberry Pi)
12:13:32 T:1961226240 NOTICE: Kodi compiled May 7 2015 by GCC 4.6.3 for Linux ARM 32-bit version 3.2.51 (197171)
12:13:32 T:1961226240 NOTICE: Running on XBian 1.0 (knockout), kernel: Linux ARM 32-bit version 3.18.8+
12:13:32 T:1961226240 NOTICE: FFmpeg statically linked, version: 2.4.6-xbmc-2.4.6-Helix
12:13:32 T:1961226240 NOTICE: Host CPU: ARMv7 Processor rev 5 (v7l), 4 cores available
12:13:32 T:1961226240 NOTICE: ARM Features: Neon enabled
12:13:32 T:1961226240 NOTICE: special://xbmc/ is mapped to: /usr/local/share/kodi
12:13:32 T:1961226240 NOTICE: special://xbmcbin/ is mapped to: /usr/local/lib/kodi
12:13:32 T:1961226240 NOTICE: special://masterprofile/ is mapped to: /home/xbian/.kodi/userdata
12:13:32 T:1961226240 NOTICE: special://home/ is mapped to: /home/xbian/.kodi
12:13:32 T:1961226240 NOTICE: special://temp/ is mapped to: /home/xbian/.kodi/temp
12:13:32 T:1961226240 NOTICE: The executable running is: /usr/local/lib/kodi/kodi.bin
12:13:32 T:1961226240 NOTICE: Local hostname: xbian
12:13:32 T:1961226240 NOTICE: Log File is located: /home/xbian/.kodi/temp/kodi.log
12:13:32 T:1961226240 NOTICE: -----------------------------------------------------------------------
12:13:32 T:1961226240 NOTICE: load settings...
12:13:33 T:1961226240 NOTICE: Found 1 Lists of Devices
12:13:33 T:1961226240 NOTICE: Enumerated PI devices:
12:13:33 T:1961226240 NOTICE: Device 1
12:13:33 T:1961226240 NOTICE: m_deviceName : HDMI
12:13:33 T:1961226240 NOTICE: m_displayName : HDMI
12:13:33 T:1961226240 NOTICE: m_displayNameExtra:
12:13:33 T:1961226240 NOTICE: m_deviceType : AE_DEVTYPE_HDMI
12:13:33 T:1961226240 NOTICE: m_channels : FL,FR
12:13:33 T:1961226240 NOTICE: m_sampleRates : 8000,11025,16000,22050,24000,32000,44100,48000,88200,96000,176400,192000
12:13:33 T:1961226240 NOTICE: m_dataFormats : AE_FMT_FLOAT,AE_FMT_S32NE,AE_FMT_S16NE,AE_FMT_S32LE,AE_FMT_S16LE,AE_FMT_FLOATP,AE_FMT_S32NEP,AE_FMT_S16NEP,AE_FMT_AC3,AE_FMT_DTS,AE_FMT_EAC3
12:13:33 T:1961226240 NOTICE: Device 2
12:13:33 T:1961226240 NOTICE: m_deviceName : Analogue
12:13:33 T:1961226240 NOTICE: m_displayName : Analogue
12:13:33 T:1961226240 NOTICE: m_displayNameExtra:
12:13:33 T:1961226240 NOTICE: m_deviceType : AE_DEVTYPE_PCM
12:13:33 T:1961226240 NOTICE: m_channels : FL,FR
12:13:33 T:1961226240 NOTICE: m_sampleRates : 48000
12:13:33 T:1961226240 NOTICE: m_dataFormats : AE_FMT_FLOAT,AE_FMT_S32LE,AE_FMT_S16LE,AE_FMT_FLOATP,AE_FMT_S32NEP,AE_FMT_S16NEP
12:13:33 T:1961226240 NOTICE: Device 3
12:13:33 T:1961226240 NOTICE: m_deviceName : Both
12:13:33 T:1961226240 NOTICE: m_displayName : HDMI and Analogue
12:13:33 T:1961226240 NOTICE: m_displayNameExtra:
12:13:33 T:1961226240 NOTICE: m_deviceType : AE_DEVTYPE_PCM
12:13:33 T:1961226240 NOTICE: m_channels : FL,FR
12:13:33 T:1961226240 NOTICE: m_sampleRates : 48000
12:13:33 T:1961226240 NOTICE: m_dataFormats : AE_FMT_FLOAT,AE_FMT_S32LE,AE_FMT_S16LE,AE_FMT_FLOATP,AE_FMT_S32NEP,AE_FMT_S16NEP
12:13:33 T:1961226240 NOTICE: Loaded settings file from special://xbmc/system/advancedsettings.xml
12:13:33 T:1961226240 NOTICE: Contents of special://xbmc/system/advancedsettings.xml are...
<?xml version="1.0" encoding="UTF-8" ?>
<advancedsettings>
<video>
<defaultplayer>dvdplayer</defaultplayer>
<defaultdvdplayer>dvdplayer</defaultdvdplayer>
</video>
</advancedsettings>
12:13:33 T:1961226240 NOTICE: Loaded settings file from special://profile/advancedsettings.xml
12:13:33 T:1961226240 NOTICE: Contents of special://profile/advancedsettings.xml are...
<advancedsettings>
<network>
<cachemembuffersize>20971520</cachemembuffersize>
<readbufferfactor>4.0</readbufferfactor>
</network>
<samba>
<clienttimeout>10</clienttimeout>
</samba>
<fanartres>720</fanartres>
<imageres>540</imageres>
<fullscreen>true</fullscreen>
<libass>
<styleoverrides>
<style name="Shadow" value="0" />
<style name="Blur" value="0" />
<style name="BorderStyle" value="0" />
</styleoverrides>
</libass>
<gui />
<lookandfeel>
<webserver>true</webserver>
</lookandfeel>
<gui>
<visualizedirtyregions>false</visualizedirtyregions>
</gui>
<destroywindowcontrols>0</destroywindowcontrols>
<useddsfanart>0</useddsfanart>
</advancedsettings>
12:13:33 T:1961226240 NOTICE: Default DVD Player: dvdplayer
12:13:33 T:1961226240 NOTICE: Default Video Player: dvdplayer
12:13:33 T:1961226240 NOTICE: Default Audio Player: paplayer
12:13:33 T:1961226240 NOTICE: Disabled debug logging due to GUI setting. Level 0.
12:13:33 T:1961226240 NOTICE: Log level changed to "LOG_LEVEL_NORMAL"
12:13:33 T:1961226240 NOTICE: CMediaSourceSettings: loading media sources from special://masterprofile/sources.xml
12:13:33 T:1961226240 NOTICE: Loading player core factory settings from special://xbmc/system/playercorefactory.xml.
12:13:33 T:1961226240 NOTICE: Loaded playercorefactory configuration
12:13:33 T:1961226240 NOTICE: Loading player core factory settings from special://masterprofile/playercorefactory.xml.
12:13:33 T:1961226240 NOTICE: special://masterprofile/playercorefactory.xml does not exist. Skipping.
12:13:33 T:1959093264 NOTICE: Thread ActiveAE start, auto delete: false
12:13:33 T:1950704656 NOTICE: Thread AESink start, auto delete: false
12:13:33 T:1890579472 NOTICE: Thread CRBPWorker start, auto delete: false
12:13:33 T:1961226240 NOTICE: Running database version Addons16
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repository.xbmcadult
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository net.rieter.xot.repository
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repository.popey
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repository.xycl.addons
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repository.xbmc-repo-agx
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repository.xbmc.org
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repo.xbian.xbmc
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository xbmc.repo.hitcher
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repository.superrepo.org.gotham.all
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository repository.sickbeard.xbmc-plugins
12:13:33 T:1961226240 NOTICE: ADDONS: Using repository ruuk.addon.repository
12:13:33 T:1961226240 NOTICE: Register - new cec device registered on cec->RPI: CEC Adapter (2708:1001)
12:13:33 T:1881682960 NOTICE: Thread CECAdapter start, auto delete: false
12:13:33 T:1856517136 NOTICE: Thread PeripBusUSBUdev start, auto delete: false
12:13:33 T:1961226240 ERROR: DBus: Error org.freedesktop.UDisks.Error.PermissionDenied - Not Authorized
12:13:33 T:1961226240 ERROR: DBus: Error org.freedesktop.UDisks.Error.Failed - Error mounting: mount exited with exit code 1: helper failed with:
mount: according to mtab, /dev/mmcblk0p2 is already mounted on /home
mount failed
12:13:34 T:1961226240 NOTICE: Raspberry PI firmware version: Apr 21 2015 14:40:08
Copyright © 2012 Broadcom
version 2d5ad04b63af4233440c3f7c8587108223201102 (clean) (release)
12:13:34 T:1961226240 NOTICE: ARM mem: 752MB GPU mem: 256MB MPG2:1 WVC1:1
12:13:34 T:1961226240 NOTICE: Config:
arm_control=0xa5800010
arm_freq=900
avoid_fix_ts=1
config_hdmi_boost=2
core_freq=250
disable_l2cache=1
disable_overscan=1
disable_splash=1
emmc_pll_core=1
force_eeprom_read=1
force_pwm_open=1
framebuffer_ignore_alpha=1
framebuffer_swap=1
hdmi_channel_map=8
hdmi_force_cec_address=65535
hdmi_ignore_cec_init=1
initial_turbo=3
over_voltage_avs=0x1b774
pause_burst_frames=1
program_serial_random=1
sdram_freq=450
temp_limit=85
12:13:34 T:1961226240 NOTICE: Config:
decode_MPG2=0xbb8b5d38
decode_WVC1=0x4cdef3e
device_tree=-
12:13:34 T:1961226240 NOTICE: Register - new video device registered on platform->/sys/class/graphics/fb0: generic_video,hdmi_video (0000:0000)
12:13:34 T:1961226240 NOTICE: InitWindowSystem: Using EGL Implementation: raspberrypi
12:13:34 T:1848128528 NOTICE: Thread PeripBusPLATFORMUdev start, auto delete: false
12:13:34 T:1961226240 NOTICE: Found resolution 640x480 (640x480) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 640x480 (640x480) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 720x480 (720x480) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 720x480 (720x480) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x720 (1280x720) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x720 (1280x720) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 720x576 (720x576) @ 50.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x720 (1280x720) @ 50.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 50.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 24.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 23.98 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 25.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 30.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1920x1080 (1920x1080) @ 29.97 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 640x480 (640x480) @ 72.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 640x480 (640x480) @ 75.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 800x600 (800x600) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 800x600 (800x600) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 800x600 (800x600) @ 72.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 800x600 (800x600) @ 75.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1024x768 (1024x768) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1024x768 (1024x768) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1024x768 (1024x768) @ 70.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1024x768 (1024x768) @ 75.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1152x864 (1152x864) @ 75.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x800 (1280x800) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x800 (1280x800) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x960 (1280x960) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x960 (1280x960) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x1024 (1280x1024) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x1024 (1280x1024) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1280x1024 (1280x1024) @ 75.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1360x768 (1360x768) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1360x768 (1360x768) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1440x900 (1440x900) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1440x900 (1440x900) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1440x900 (1440x900) @ 75.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1600x1200 (1440x1080) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1600x1200 (1440x1080) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1680x1050 (1680x1050) @ 60.00 - Full Screen
12:13:34 T:1961226240 NOTICE: Found resolution 1680x1050 (1680x1050) @ 59.94 - Full Screen
12:13:34 T:1961226240 NOTICE: Found (1920x1080@60.000000) at 22, swapping with 16
12:13:34 T:1961226240 NOTICE: Checking resolution 16
12:13:34 T:1961226240 NOTICE: GL_VENDOR = Broadcom
12:13:34 T:1961226240 NOTICE: GL_RENDERER = VideoCore IV HW
12:13:34 T:1961226240 NOTICE: GL_VERSION = OpenGL ES 2.0
12:13:34 T:1961226240 NOTICE: GL_SHADING_LANGUAGE_VERSION = OpenGL ES GLSL ES 1.00
12:13:34 T:1961226240 NOTICE: GL_EXTENSIONS = GL_OES_compressed_ETC1_RGB8_texture GL_OES_compressed_paletted_texture GL_OES_texture_npot GL_OES_depth24 GL_OES_vertex_half_float GL_OES_EGL_image GL_OES_EGL_image_external GL_EXT_discard_framebuffer GL_OES_rgb8_rgba8 GL_OES_depth32 GL_OES_mapbuffer GL_EXT_texture_format_BGRA8888 GL_APPLE_rgb_422 GL_EXT_debug_marker
12:13:34 T:1839739920 NOTICE: Thread CECAdapterUpdate start, auto delete: false
12:13:34 T:1961226240 NOTICE: Running database version Addons16
12:13:34 T:1961226240 NOTICE: Running database version ViewModes6
12:13:34 T:1961226240 NOTICE: Running database version Textures13
12:13:35 T:1961226240 NOTICE: Running database version MyMusic48
12:13:35 T:1961226240 NOTICE: Running database version MyVideos90
12:13:35 T:1961226240 NOTICE: Running database version TV26
12:13:35 T:1961226240 NOTICE: Running database version Epg8
12:13:35 T:1961226240 NOTICE: start dvd mediatype detection
12:13:35 T:1829405712 NOTICE: Thread DetectDVDMedia start, auto delete: false
12:13:36 T:1961226240 WARNING: JSONRPC: Could not parse type "PVR.Details.Channel"
12:13:36 T:1961226240 WARNING: JSONRPC: Could not parse type "PVR.Details.ChannelGroup.Extended"
12:13:36 T:1961226240 WARNING: JSONRPC: Could not parse type "GUI.Property.Value"
12:13:36 T:1961226240 WARNING: JSONRPC: Could not parse type "Setting.Details.SettingList"
12:13:36 T:1815082000 NOTICE: Thread LanguageInvoker start, auto delete: false
12:13:36 T:1961226240 NOTICE: Previous line repeats 11 times.
12:13:36 T:1961226240 NOTICE: UpdateLibraries: Starting music library startup scan
12:13:36 T:1712321552 NOTICE: Thread MusicInfoScanner start, auto delete: false
12:13:36 T:1703932944 NOTICE: Thread LanguageInvoker start, auto delete: false
12:13:36 T:1961226240 NOTICE: Previous line repeats 3 times.
12:13:36 T:1961226240 NOTICE: initialize done
12:13:36 T:1961226240 NOTICE: XBian: notifying Upstart that i'm well
12:13:36 T:1961226240 NOTICE: Running the application...
12:13:36 T:1815082000 NOTICE: -->Python Interpreter Initialized<--
12:13:37 T:1666184208 NOTICE: Thread JobWorker start, auto delete: true
12:13:37 T:1961226240 NOTICE: starting zeroconf publishing
12:13:37 T:1647309840 NOTICE: Thread JobWorker start, auto delete: true
12:13:37 T:1961226240 NOTICE: Webserver: Starting...
12:13:37 T:1961226240 NOTICE: WebServer: Started the webserver
12:13:37 T:1961226240 NOTICE: starting upnp controller
12:13:37 T:1630532624 NOTICE: Thread JobWorker start, auto delete: true