I had decided that the next thing to do was to try to get debug output from usb_modeswitch. In my efforts to find out how to do this I came across
http://www.draisberghof.de/usb_modeswitch/#trouble which includes a couple of notes about devices with ID 19d2:2000. The K3520-Z is one such device. One of the notes is to the effect that newer kernels attempt to switch the mode of some devices and get it wrong for ID 19d2:2000, thereby messing things up for usb_modeswitch. I've no idea whether that is what is happening to me (if it is, then this is a kernel problem), but the revelation that the kernel switches the mode of some devices probably explains why my K3770 switches mode without usb_modeswitch getting involved. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1175093 Title: K3520-Z mode not switched automatically Status in “network-manager” package in Ubuntu: New Bug description: Ubuntu 12.04.2 LTS Although I have logged this as a network-manager problem, it could well turn out to be an issue with usb-modeswitch (usb-modeswitch 1.2.3+repack0-1ubuntu2) or usb-modeswitch-data (usb-modeswitch-data 20120120-0ubuntu1). Expected behaviour (and what happened in 10.04): * The presence of mobile broadband dongle K3520-Z should be detected. * The appropriate steps should be taken to switch it from usb-storage mode. * Mobile broadband should be enabled. What actually happens: * The dongle remains in usb-storage mode. * Mobile broadband does not appear as an option on the network drop-down menu. The following commands can be used to work around the problem: sudo modprobe --verbose option sudo echo "19d2 0055" >/sys/bus/usb-serial/drivers/option1/new_id sudo usb_modeswitch --default-vendor 0x19d2 --default-product 0x2000 --message-content "5553424312345678000000000000061e000000000000000000000000000000" --message- content2="5553424312345679000000000000061b000000020000000000000000000000" --message- content3="55534243123456702000000080000c85010101180101010101000000000000" --need-response --target-vendor 0x19d2 --target-product 0x0055 -s 20 -D After these commands mobile broadband appears as a disabled option in the network drop-down menu. Once mobile broadband is manually enabled, all is well. The remainder of this bug report might or might not contain useful information. When I tried researching this problem, I encountered threads in various forums that seemed to be reporting the same failure but for different dongles. This bug might therefore not be limited to the K3520-Z, but I do know that it doesn't apply to a K3770 as I also have one of those (I suppose I could swap the SIM from the K3520-Z to the K3770 to work around the problem, but I'd rather not risk damaging the SIM in the process). When I first encountered this problem after upgrading from 10.04.01 to 12.04.2, I was puzzled by the fact that mobile broadband had worked perfectly after the upgrade completed but then failed on a later startup. I was further confused when from time to time it worked on subsequent startups. I have, however, now realised what was going on and have tested my understanding appropriately. Following a shutdown and startup mobile broadband fails because the dongle has been powered down and hence has reverted to usb-storage mode, but following a restart mobile broadband works (providing it was working prior to the restart) because the dongle has remained powered throughout and hence has not reverted to usb-storage mode. This problem manifests itself in the same way on a netbook (I'll provide more details of the hardware if they are considered useful). This is what might well be expected, but I mention it because on 10.04.1 I had an entirely different experience. The K3520-Z used to switch mode automatically on both systems, but I had to switch the K3770 manually on the netbook (this is why I was able to come up with the above workaround after upgrading to 12.04.02 - I had done all the hard work discovering the workaround 18 months ago when I bought the K3770 while on holiday in Spain and now just needed to find the correct usb_modeswitch options for the K3520-Z). No, you haven't misread that. The dongle that switched mode automatically on both systems in 10.04.01 now fails to switch automatically on both in 12.04.02, while the one that switched automatically on only one of the two systems in 10.04.01 now switches automatically on both in 12.04.02. If it's on any interest, the following is the output from the above commands: Looking for target devices ... No devices in target mode or class found Looking for default devices ... found matching product ID adding device Found device in default mode, class or configuration (1) Accessing device 002 on bus 007 ... Getting the current device configuration ... OK, got current device configuration (1) Using first interface: 0x00 Using endpoints 0x09 (out) and 0x89 (in) Inquiring device details; driver will be detached ... Looking for active driver ... OK, driver found ("usb-storage") OK, driver "usb-storage" detached SCSI inquiry data (for identification) ------------------------- Vendor String: ZTE Corp Model String: USB Storage Revision String: 2.31 ------------------------- USB description data (for identification) ------------------------- Manufacturer: Qualcomm, Incorporated Product: USB ZTE Storage Serial No.: P671M8VDF_MS ------------------------- Setting up communication with interface 0 Using endpoint 0x09 for message sending ... Trying to send message 1 to endpoint 0x09 ... OK, message successfully sent Reading the response to message 1 (CSW) ... OK, response successfully read (13 bytes). Trying to send message 2 to endpoint 0x09 ... OK, message successfully sent Reading the response to message 2 (CSW) ... OK, response successfully read (0 bytes). Trying to send message 3 to endpoint 0x09 ... OK, message successfully sent Reading the response to message 3 (CSW) ... OK, response successfully read (0 bytes). Resetting response endpoint 0x89 Could not reset endpoint (probably harmless): -71 Resetting message endpoint 0x09 Could not reset endpoint (probably harmless): -71 Device is gone, skipping any further commands Checking for mode switch (max. 20 times, once per second) ... Searching for target devices ... Searching for target devices ... Searching for target devices ... found matching product ID adding device Found target device, now opening Error: could not get description string "serial number" Found correct target device Mode switch succeeded. Bye. ok:19d2:0055 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: network-manager 0.9.4.0-0ubuntu4.2 ProcVersionSignature: Ubuntu 3.2.0-40.64-generic 3.2.40 Uname: Linux 3.2.0-40-generic i686 ApportVersion: 2.0.1-0ubuntu17.2 Architecture: i386 CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Date: Wed May 1 08:51:46 2013 IfupdownConfig: auto lo iface lo inet loopback IpRoute: default via 10.64.64.64 dev ppp0 proto static 10.64.64.64 dev ppp0 proto kernel scope link src 10.162.121.221 169.254.0.0/16 dev ppp0 scope link metric 1000 IwConfig: ppp0 no wireless extensions. lo no wireless extensions. eth0 no wireless extensions. MarkForUpload: True NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true ProcEnviron: TERM=xterm LC_COLLATE=C PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash RfKill: SourcePackage: network-manager UpgradeStatus: Upgraded to precise on 2013-04-30 (1 days ago) nmcli-con: NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH Wired connection 1 f026e4a8-c33d-4dba-b3d6-7583ad941a94 802-3-ethernet 1367391728 Wed 01 May 2013 08:02:08 BST yes no /org/freedesktop/NetworkManager/Settings/1 Vodafone UK 88242320-34e0-11e0-a76e-f9f1249a58d9 gsm 1367394427 Wed 01 May 2013 08:47:07 BST no no /org/freedesktop/NetworkManager/Settings/0 nmcli-dev: DEVICE TYPE STATE DBUS-PATH ttyUSB0 gsm connected /org/freedesktop/NetworkManager/Devices/2 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0 nmcli-nm: RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN running 0.9.4.0 connected enabled enabled enabled enabled enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1175093/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
