From mboxrd@z Thu Jan 1 00:00:00 1970 From: jmahoney@waav.com (John Mahoney) Date: Wed, 2 Mar 2011 12:33:09 -0500 Subject: likely kernel/driver problem with 3G USB stick In-Reply-To: <4D6D1A83.7000907@gmx.com> References: <4D6D1A83.7000907@gmx.com> Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org On Tue, Mar 1, 2011 at 11:10 AM, Simon Leung wrote: > Hi all, > > I'm having a problem with my 3G USB stick (Huawei E220) . > > The kernel I'm using is version 2.6.21 customized for an ARM board. When > I insert the USB stick into the system, normally 3 device show up: > /dev/ttyUSB{0,1,2}. The problem I' having is that some time, only the > first one shows up and I cannot connect to it. When this happens, > normally a reboot will fix it. > > As I said, this sounds like a kernel/driver issue to me. Could somebody > give me some pointers as how to prove/fix it? > > > You may need to eject the scsi cdrom with USB_ModeSwitch. In distros with normally is automatically done via a udev rule. -- John -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110302/eadbc86c/attachment.html