im using a clean install of lubuntu 13.10 32bit. my external hard drive no longer shows up in pcmanfm unless i disconnect and reconnect the power source. after i do this it usually remains connected for a minute or two and then completely disappears. if i reboot in this state with the device plugged in the system restarts very slowly.
as far as i know the external hdd has been working perfectly up to now. any ideas what could be happening?