When I connect my phone over USB to tether to the 3G network, syslog shows:
[ 189.877520] usb 1-1: USB disconnect, address 4
[ 190.452292] usb 1-1: new high speed USB device using ehci_hcd and address 5
[ 190.685980] cdc_acm 1-1:1.6: This device cannot do calls on its own. It is not a modem.
[ 190.686219] cdc_acm 1-1:1.6: ttyACM0: USB ACM device
[ 190.689167] usbcore: registered new interface driver cdc_acm
[ 190.689177] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters
[ 190.715203] NET: Registered protocol family 35
[ 190.756543] ------------[ cut here ]------------
[ 190.756564] WARNING: at /build/buildd/linux-2.6.37/include/linux/netdevice.h:1557 usbpn_probe+0x28c/0x2c0 [cdc_phonet]()
[ 190.756574] Hardware name: S10-3
[ 190.756580] Modules linked in: usbnet(+) cdc_phonet(+) phonet cdc_acm aes_i586 aes_generic binfmt_misc ip6table_filter ip6_tables parport_pc ppdev dm_crypt snd_hda_codec_realtek xt_CHECKSUM iptable_mangle snd_hda_intel snd_hda_codec ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 snd_hwdep arc4 nf_defrag_ipv4 xt_state nf_conntrack snd_pcm brcm80211(C) snd_seq_midi ipt_REJECT snd_rawmidi xt_tcpudp iptable_filter ip_tables joydev x_tables snd_seq_midi_event bridge mac80211 stp snd_seq snd_timer snd_seq_device uvcvideo cfg80211 psmouse videodev serio_raw ideapad_laptop snd v4l1_compat soundcore shpchp snd_page_alloc lp parport i915 drm_kms_helper ahci usb_storage drm uas libahci r8169 i2c_algo_bit video output
[ 190.756725] Pid: 2170, comm: modprobe Tainted: G C 2.6.37-12-generic #26-Ubuntu
[ 190.756733] Call Trace:
[ 190.756748] [<c05f960e>] ? printk+0x30/0x32
[ 190.756765] [<c014feb2>] warn_slowpath_common+0x72/0xa0
[ 190.756781] [<f883466c>] ? usbpn_probe+0x28c/0x2c0 [cdc_phonet]
[ 190.756795] [<f883466c>] ? usbpn_probe+0x28c/0x2c0 [cdc_phonet]
[ 190.756808] [<c014ff02>] warn_slowpath_null+0x22/0x30
[ 190.756821] [<f883466c>] usbpn_probe+0x28c/0x2c0 [cdc_phonet]
[ 190.756836] [<c049ef39>] usb_probe_interface+0xd9/0x1b0
[ 190.756849] [<c0283b97>] ? sysfs_create_link+0x17/0x20
[ 190.756864] [<c0427a7d>] really_probe+0x4d/0x150
[ 190.756877] [<c042ffeb>] ? pm_runtime_barrier+0x4b/0xb0
[ 190.756889] [<c0427d1c>] driver_probe_device+0x3c/0x60
[ 190.756901] [<c0427dc1>] __driver_attach+0x81/0x90
[ 190.756913] [<c0427d40>] ? __driver_attach+0x0/0x90
[ 190.756925] [<c0426da8>] bus_for_each_dev+0x48/0x70
[ 190.756937] [<c042792e>] driver_attach+0x1e/0x20
[ 190.756948] [<c0427d40>] ? __driver_attach+0x0/0x90
[ 190.756959] [<c04274e1>] bus_add_driver+0xc1/0x2c0
[ 190.756972] [<c0428006>] driver_register+0x66/0x110
[ 190.756986] [<c01d26af>] ? trace_module_notify+0x2f/0x170
[ 190.756999] [<c049dbe1>] usb_register_driver+0x81/0x140
[ 190.757014] [<f8146017>] usbpn_init+0x17/0x1000 [cdc_phonet]
[ 190.757026] [<c0101255>] do_one_initcall+0x35/0x170
[ 190.757038] [<f8146000>] ? usbpn_init+0x0/0x1000 [cdc_phonet]
[ 190.757049] [<c01892f3>] sys_init_module+0xd3/0x220
[ 190.757059] [<c05fc0b4>] syscall_call+0x7/0xb
[ 190.757068] ---[ end trace b41ba6fd72cb097d ]---
[ 190.757074] netif_stop_queue() cannot be called before register_netdev()
[ 190.770406] usbcore: registered new interface driver cdc_phonet
[ 190.826525] cdc_ether 1-1:1.8: usb0: register 'cdc_ether' at usb-0000:00:1d.7-1, CDC Ethernet Device, e6:89:1e:96:0b:6c
[ 190.837321] usbcore: registered new interface driver cdc_ether
I'm unable then to connect to 3G. In the past I've always been able to connect.
This is in natty after an update.
WORKAROUND: I just wanted to make sure you (and anyone else affected by this bug)
were aware of a workaround - you can install the power kernel and mobile
hotspot (http://mobilehotspot.garage.maemo.org/), which lets you tether
over usb or (supposedly) wifi. It's more finicky than the automatic
tethering (by finicky I mean a few extra steps required), but at least
it works until this bug is fixed.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image (not installed)
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: serge 1787 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0x40600000 irq 43'
Mixer name : 'Realtek ALC272'
Components : 'HDA:10ec0272,17aa4004,00100001'
Controls : 16
Simple ctrls : 9
Date: Mon Jan 31 10:58:46 2011
HibernationDevice: RESUME=UUID=6baf9bd1-8b2e-4589-b1f7-023f97f318a0
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: LENOVO S10-3
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
LC_MESSAGES=en_US.utf8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.37-12-generic root=UUID=b2c4a6f3-bb45-4483-9864-01426d30aca5 ro
RelatedPackageVersions:
linux-restricted-modules-2.6.37-12-generic N/A
linux-backports-modules-2.6.37-12-generic N/A
linux-firmware 1.46
SourcePackage: linux
StagingDrivers: brcm80211
Title: [STAGING]
dmi.bios.date: 06/29/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 2ACN31WW
dmi.board.name: Mariana3A
dmi.board.vendor: Lenovo
dmi.board.version: Rev 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Lenovo
dmi.chassis.version: Rev 1.0
dmi.modalias: dmi:bvnLENOVO:bvr2ACN31WW:bd06/29/2010:svnLENOVO:pnS10-3:pvrLenovo:rvnLenovo:rnMariana3A:rvrRev1.0:cvnLenovo:ct10:cvrRev1.0:
dmi.product.name: S10-3
dmi.product.version: Lenovo
dmi.sys.vendor: LENOVO
This affects me with my Nokia N900 phone. I could tether it under 10.04. 10.10 broke this feature. It is still broken under 11.04.