ubuntu stops recognizing usbs

[mythic97]

Ubuntu keeps refusing my usbs I can't use my USB dongle or external hard disk please help usbs not shown at all in file browser

[rnerwein]

Ubuntu keeps refusing my usbs I can't use my USB dongle or external hard disk please help usbs not shown at all in file browser

hi
i don't now what version you are running - mine is 12.04 LTS.
hope on your system is the same /sys structure as on mine.
try:
cat /sys/bus/usb/devices/usb?/authorized_default (or cd /sys/....
all this values should be 1
next
cat /sys/bus/usb/devices/1-2/authorized
should be 1
i ain't now your system - therefor cd //sys/bus/usb/devices/
there you will find (i hope) usb1, usb2 .... - in each of these directories you will find the authorize... file. all of them should be one. if they are set to 0 change it with (must be root) e.g.
echo 1 > /sys/bus/usb/devices/1-2/authorized
it's a change but normaly all of these devices are enabled.
cheers