3g usb modem manually remove fails.

[deepclutch]

I got a Huawei K4505 3G Modem and it works fine in Linux. but, after disconnecting from network manager, I cannot "safely remove" modem.
if I run "sync && eject /dev/sdb" or "umount/pumount /dev/sdb" it also fails.

I need some info how to manually "safely" remove this device, since, ubuntu does not be able to safely remove neither My Kindle e-reader or this modem.

regards,
dc

[deepclutch]

I tried this and it unmounted:
http://forums.debian.net/viewtopic.p...=52627#p311645

and it removes the drive. I hope, ubuntu will fix this bug with usb devices which are not usb flash memory, but devices like 3g modem etc.

[deepclutch]

I am fed up with this issue. Is there any fix for this. I am confused about the process to unbind usb modem. can anyone help?

when I put this K4505 Huawei modem on Windows 7, it is detected as a usb modem as well as a data storage device and mounted as a partition(it has mobile manager software pops up).

Is there something I miss? I fear this modem will get damaged if I force remove the device every time(although I make sure usb modem icon disappear in "computer:" in nautilus file manager).

I did type these commands after finding usb port used is "2-1":
as root(sudo su) :

sync&&sync&&sync

echo "auto" > "/sys/bus/usb/devices/usb2/2-1/power/level"

echo "2-1:1.1" > "/sys/bus/usb/devices/2-1\:1.0/driver/unbind"

^^ I hope these 2 steps are enough? but, I try to remove the device attributes also before pulling usb modem out of the port.

echo "1" > "/sys/bus/usb/devices/usb2/2-1/remove"

Can someone guide Me whether I am doing is the correct way?