g-p-m fails to talk to DeviceKit-disks:
TI:23:56:53 TH:0x11f3080 FI:gpm-disks.c FN:gpm_disks_register,101
- failed to set spindown timeout: Method "DriveSetAllSpindownTimeouts" with signature "ias" on interface "org.freedesktop.DeviceKit.Disks" doesn't exist
The reason is that it uses the wrong object path for DKd.
It should use "/org/freedesktop/DeviceKit/Disks" instead of "/"
I fixed it a few days ago in git master, thanks.