I stopped and restarted in debug mode udisksd. The event arrives, then it simply stops and does nothing.
Log from the daemon (inserting another USB stick, so it's sdd now):
14:28:17.122:[5681]:[NOTICE]: Acquired the name org.freedesktop.UDisks2 on the system message bus [main.c:77, on_name_acquired()]
14:28:17.846:[5683]:[INFO]: Housekeeping complete [udiskslinuxprovider.c:973, housekeeping_thread_func()]
14:28:34.725:[5681]:[DEBUG]: uevent add /sys/devices/pci0000:00/0000:00:1c.4/0000:04:00.0/usb3/3-1/3-1:1.0/host12 [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()]
14:28:35.960:[5681]:[DEBUG]: uevent add /sys/devices/pci0000:00/0000:00:1c.4/0000:04:00.0/usb3/3-1/3-1:1.0/host12/target12:0:0 [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()]
14:28:35.961:[5681]:[DEBUG]: uevent add /sys/devices/pci0000:00/0000:00:1c.4/0000:04:00.0/usb3/3-1/3-1:1.0/host12/target12:0:0/12:0:0:0 [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()]
14:28:36.043:[5681]:[DEBUG]: uevent add /sys/devices/pci0000:00/0000:00:1c.4/0000:04:00.0/usb3/3-1/3-1:1.0/host12/target12:0:0/12:0:0:0/block/sdd [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()]
14:28:36.112:[5681]:[DEBUG]: uevent add /sys/devices/pci0000:00/0000:00:1c.4/0000:04:00.0/usb3/3-1/3-1:1.0/host12/target12:0:0/12:0:0:0/block/sdd/sdd1 [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()]
I stopped and restarted in debug mode udisksd. The event arrives, then it simply stops and does nothing.
Log from the daemon (inserting another USB stick, so it's sdd now):
14:28:17. 122:[5681] :[NOTICE] : Acquired the name org.freedesktop .UDisks2 on the system message bus [main.c:77, on_name_acquired()] 846:[5683] :[INFO] : Housekeeping complete [udiskslinuxpro vider.c: 973, housekeeping_ thread_ func()] 725:[5681] :[DEBUG] : uevent add /sys/devices/ pci0000: 00/0000: 00:1c.4/ 0000:04: 00.0/usb3/ 3-1/3-1: 1.0/host12 [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 960:[5681] :[DEBUG] : uevent add /sys/devices/ pci0000: 00/0000: 00:1c.4/ 0000:04: 00.0/usb3/ 3-1/3-1: 1.0/host12/ target12: 0:0 [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 961:[5681] :[DEBUG] : uevent add /sys/devices/ pci0000: 00/0000: 00:1c.4/ 0000:04: 00.0/usb3/ 3-1/3-1: 1.0/host12/ target12: 0:0/12: 0:0:0 [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 043:[5681] :[DEBUG] : uevent add /sys/devices/ pci0000: 00/0000: 00:1c.4/ 0000:04: 00.0/usb3/ 3-1/3-1: 1.0/host12/ target12: 0:0/12: 0:0:0/block/ sdd [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 112:[5681] :[DEBUG] : uevent add /sys/devices/ pci0000: 00/0000: 00:1c.4/ 0000:04: 00.0/usb3/ 3-1/3-1: 1.0/host12/ target12: 0:0/12: 0:0:0/block/ sdd/sdd1 [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )]
14:28:17.
14:28:34.
14:28:35.
14:28:35.
14:28:36.
14:28:36.
will try to add udisks to this bug report.