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I have a Samsung phone GT-B3210. For some time I was unable to find working Windows drivers for it. I eventually gave up looking. Then one time I was charging phone over its USB port and booted Ubuntu and was pleasantly surprised when I saw phone's μSD card reader on my desktop.

I now need to switch to Gentoo and would like to be able to work with phone there too. Lsusb tells me it's detected as
Bus 007 Device 006: ID 04e8:663f Samsung Electronics Co., Ltd SGH-E720/SGH-E840

but lsmod wasn't very helpful. On the list of loaded modules, I wasn't able to find one which looks like it's related to the phone.

Is there some other way to see which module is used by the telephone?

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up vote 5 down vote accepted

The USB device should appear under /sys/bus/usb/devices as several entries beginning with 7-6 or something similar. Where the driver link within the directories point will be the name of the module bound to the device.

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That way seems a bit too complicated for me. I don't hve 7-6. Instead I have something like 7-0:1.0 7-1:2.1 7-1:2.4 7-2:1.0 7-2:1.3 7-1:2.0 7-1:2.3 7-2 7-2:1.2 7-1 7-1:2.2 7-1:2.5 7-2:1.1 When I access those directories, I get links which seem to go in circles. For example 7-1->driver->7-1->driver and so on. –  AndrejaKo Aug 18 '10 at 9:07
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Don't follow the links, simply display their destination, e.g. ls -l driver. –  Ignacio Vazquez-Abrams Aug 18 '10 at 9:16
    
OK. This way interesting modules seem to be cdc-phonet, phonet and cdc-acm. –  AndrejaKo Aug 18 '10 at 9:28
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