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Old 07-29-2013, 03:55 AM   #1
abefroman
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Registered: Feb 2004
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How can I disable a usb port using a shell script? I'm getting Invalid argument errs


How can I disable a usb port using a shell script? I'm getting Invalid argument errs

Code:
root@abe-All-Series:/home/abe# echo  suspend >/sys/bus/usb/devices/usb3/power/level
bash: echo: write error: Invalid argument

root@abe-All-Series:/home/abe# echo  suspend | tee /sys/bus/usb/devices/usb3/power/level
suspend
tee: /sys/bus/usb/devices/usb3/power/level: Invalid argument

root@abe-All-Series:/home/abe# echo  on | tee /sys/bus/usb/devices/usb3/power/level
on
Its not allowing me to change the file to suspend.

TIA
 
Old 07-29-2013, 04:45 PM   #2
michaelk
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The suspend setting is no longer supported.

https://www.kernel.org/doc/Documenta...management.txt

This might work.
echo "0" > "/sys/bus/usb/devices/usbX/power/autosuspend_delay_ms"
echo "auto" > "/sys/bus/usb/devices/usbX/power/control"

http://stackoverflow.com/questions/4...off-with-linux
 
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