Hello..
I'm replying now since I didn't get any email notification even I've
been subscribed to all notifications.
I saw 2-1 and 2-1:1.0 in that directory when plugged the hdd expansion
drive. Hope it's what you meant :
ls /sys/bus/usb/devices/2-1
2-1:1.0 bDeviceSubClass configuration idProduct remove
authorized bmAttributes descriptors idVendor serial
avoid_reset_quirk bMaxPacketSize0 dev manufacturer speed
bcdDevice bMaxPower devnum maxchild subsystem
bConfigurationValue bNumConfigurations devpath power uevent
bDeviceClass bNumInterfaces driver product urbnum
bDeviceProtocol busnum ep_00 quirks version
ls /sys/bus/usb/devices/2-1:1.0
bAlternateSetting bInterfaceProtocol driver host4 subsystem
bInterfaceClass bInterfaceSubClass ep_02 modalias supports_autosuspend
bInterfaceNumber bNumEndpoints ep_81 power uevent
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1222313
Title:
0bc2:2300 [HP Pavillion dm3-1109TU] External HDD goes into low power
mode delaying saving by 10-20 seconds
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