On Wed, 15 Dec 2010 12:06:20 -0500 Don Zickus <dzickus@xxxxxxxxxx> wrote: > On Wed, Dec 15, 2010 at 11:27:29AM -0200, Herton Ronaldo Krzesinski wrote: > > > These usb modems expose this /dev/srX with windows drivers etc., but are of > > > no use in Linux. Newer distros automatically should eject this CD-rom only > > > devices to get the real modem, for example usb_modeswitch can be used for > > > this, see his page which also has more explanations: > > > http://www.draisberghof.de/usb_modeswitch/ > > > > Forgot to say, like zhao ming said, you can add a quirk to usb-storage too to > > automatically eject the device, but may be the user space option to eject it > > is more feasible. > > Part of the problem is the person reporting the problem says the device > never shows up as a cd-rom, so usb_modeswitch never gets a chance to do > its magic. > > Thoughts? Hmm strange, in this case may be usb-storage isn't loaded or built in, so no device is created which can be ejected. It can be also some program already tried to switch it to modem mode using a custom command which didn't work, and left device at a wrong state. I don't know what the system has, but may be it has some pre-configured udev rule, check /etc/udev/rules.d/ and /lib/udev/rules.d/ for rules which match 19d2:2000 id. If it has, comment the rule and ask to device to be inserted again, and use directly the eject command, if this works, then that rule/ program which runs it to eject should be at fault. Or this is a different device, and it doesn't export a cdrom device, but still expect we do something to switch it to modem mode, so needing to really do something in side usb_storage to switch it to modem mode. If it's a cdrom storage device, "lsusb -v -d 19d2:2000" should show interface descriptor with: bInterfaceClass 8 Mass Storage bInterfaceSubClass 6 SCSI Which then confirms it is a usb-storage device really. May be Zhao Ming has some other idea too? > > Cheers, > Don -- []'s Herton -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
