USB 3g modems dont switch to ttyUSB until udevadm trigger

Bug #925473 reported by Andrew McDonnell
20
This bug affects 3 people
Affects Status Importance Assigned to Milestone
udev (Ubuntu)
Undecided
Unassigned

Bug Description

After completed install of xubuntu precise i386:

inserting any USB modem, none are recognised (I tried E220, E169 and E160E)

in dmesg all you see is the fake CDROM device, indicating the usb modeswitch isnt happening

eventually I tried `udevadm trigger` with the E220 plugged in, and it switched to serial and I could connect to the Internet with it when modemmanager eventually found it. From this point on any of the modems are recognized as USB serial when you plugin them in.

After reboot, back to square one until the first time you do a udevadm trigger.
---
ApportVersion: 1.91-0ubuntu1
Architecture: i386
DistroRelease: Ubuntu 12.04
InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Alpha i386 (20120201.1)
Package: usb-modeswitch 1.2.0+repack0-1ubuntu1
PackageArchitecture: i386
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-12.21-generic-pae 3.2.2
Tags: precise
Uname: Linux 3.2.0-12-generic-pae i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

Revision history for this message
Ubuntu QA Website (ubuntuqa) wrote :

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/925473

tags: added: iso-testing
Revision history for this message
Andrew McDonnell (andymc73) wrote : Dependencies.txt

apport information

tags: added: apport-collected precise
description: updated
tags: added: i386 xubuntu
Revision history for this message
Andrew McDonnell (andymc73) wrote :

You can see where I took about 4 minutes before I tried `udevadm trigger`

[ 238.396086] usb 4-2: new full-speed USB device number 2 using ohci_hcd
[ 238.712948] Initializing USB Mass Storage driver...
[ 238.728092] usb 4-2: USB disconnect, device number 2
[ 238.728118] scsi3 : usb-storage 4-2:1.0
[ 238.732101] usbcore: registered new interface driver usb-storage
[ 238.732109] USB Mass Storage support registered.
[ 239.424215] usb 4-2: new full-speed USB device number 3 using ohci_hcd
[ 239.622806] scsi6 : usb-storage 4-2:1.2
[ 240.627107] scsi 6:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2
[ 240.659072] sr1: scsi-1 drive
[ 240.659389] sr 6:0:0:0: Attached scsi CD-ROM sr1
[ 240.659584] sr 6:0:0:0: Attached scsi generic sg2 type 5
[ 504.429509] usbcore: registered new interface driver usbserial
[ 504.429526] USB Serial support registered for generic
[ 504.434488] usbcore: registered new interface driver usbserial_generic
[ 504.434492] usbserial: USB Serial Driver core
[ 504.468243] USB Serial support registered for GSM modem (1-port)
[ 504.468311] option 4-2:1.0: GSM modem (1-port) converter detected
[ 504.469078] usb 4-2: GSM modem (1-port) converter now attached to ttyUSB0
[ 504.469096] option 4-2:1.1: GSM modem (1-port) converter detected
[ 504.482279] usb 4-2: GSM modem (1-port) converter now attached to ttyUSB1
[ 504.482309] usbcore: registered new interface driver option
[ 504.482312] option: v0.7.2:USB Driver for GSM modems

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in usb-modeswitch (Ubuntu):
status: New → Confirmed
Revision history for this message
Inoe (inoe-oke) wrote :

I just tried Ubuntu Precise Alpha 2 and looks like this is also the case with CDMA modem.
I use ZTE AC2726. It is detected as CD-ROM, and can't be ejected. When I try to eject it, either via Disk Utility or terminal, I got the following error:

"eject: unable to eject, last error: Invalid argument"

In my case, using 'udevadm trigger' doesn't work.

Revision history for this message
asux (ckasux) wrote :

all that was missing package HWINFO .LIBHD16 .

Revision history for this message
Mathieu Trudel-Lapierre (cyphermox) wrote :

This ought to be fixed at the udev level if anything -- usb-modeswitch is triggered by it, if it doesn't get started and udev requires manual triggering there probably is something to do there, or some usb issue.

affects: usb-modeswitch (Ubuntu) → udev (Ubuntu)
Revision history for this message
Mathieu Trudel-Lapierre (cyphermox) wrote :

Also, maybe check if after upgrading to 1.2.3+repack0-1ubuntu1 fixes the issue.

Revision history for this message
Surja Gain (surja-gain-g) wrote :

Any progress on this one? Upgrading to Ubuntu 12.04 beta2 does not seem to solve the problem. In my case sending the udevadm trigger does not seem do anything.

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