Same for me, G3 modem E169 was working on 10.04 and after doing upgrade on this computer to 10.10 it stoped working (it is no longer recognized by network applet) Linux longway 2.6.35-22-generic #35-Ubuntu SMP Sat Oct 16 20:45:36 UTC 2010 x86_64 GNU/Linux # lsusb Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 011: ID 12d1:1001 Huawei Technologies Co., Ltd. E620 USB Modem Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub # cat /etc/modprobe.conf options usb-storage delay_use=10 I have installed: ii usb-modeswitch 1.1.4-1 with above settings I reconnected the modem (delaying 20 seconds) and still it does not work. Logs say: dmesg: Oct 31 23:28:03 box kernel: [457395.790105] usb 5-1: USB disconnect, address 7 Oct 31 23:31:46 box kernel: [457619.230052] usb 5-1: new full speed USB device using uhci_hcd and address 8 Oct 31 23:31:47 box kernel: [457619.422514] scsi25 : usb-storage 5-1:1.0 Oct 31 23:31:47 box kernel: [457619.540077] usb 5-1: USB disconnect, address 8 Oct 31 23:31:47 box kernel: [457620.330046] usb 5-1: new full speed USB device using uhci_hcd and address 9 Oct 31 23:31:48 box kernel: [457620.623155] scsi29 : usb-storage 5-1:1.3 Oct 31 23:31:49 box kernel: [457621.634140] scsi 29:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 Oct 31 23:31:49 box kernel: [457621.637148] scsi 29:0:0:1: Direct-Access HUAWEI SD Storage 2.31 PQ: 0 ANSI: 2 Oct 31 23:31:49 box kernel: [457621.662129] sr1: scsi-1 drive Oct 31 23:31:49 box kernel: [457621.662384] sr 29:0:0:0: Attached scsi generic sg2 type 5 Oct 31 23:31:49 box kernel: [457621.662537] sd 29:0:0:1: Attached scsi generic sg3 type 0 Oct 31 23:31:49 box kernel: [457621.697134] sd 29:0:0:1: [sdb] Attached SCSI removable disk Oct 31 23:40:02 box kernel: [458115.290081] usb 5-1: USB disconnect, address 9 Oct 31 23:40:16 box kernel: [458128.920066] usb 5-1: new full speed USB device using uhci_hcd and address 10 Oct 31 23:40:16 box kernel: [458129.117029] scsi30 : usb-storage 5-1:1.0 Oct 31 23:40:16 box kernel: [458129.290098] usb 5-1: USB disconnect, address 10 Oct 31 23:40:17 box kernel: [458130.070074] usb 5-1: new full speed USB device using uhci_hcd and address 11 Oct 31 23:40:17 box kernel: [458130.289409] scsi34 : usb-storage 5-1:1.3 Oct 31 23:40:18 box kernel: [458131.294385] scsi 34:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 Oct 31 23:40:18 box kernel: [458131.297377] scsi 34:0:0:1: Direct-Access HUAWEI SD Storage 2.31 PQ: 0 ANSI: 2 Oct 31 23:40:18 box kernel: [458131.324365] sr1: scsi-1 drive Oct 31 23:40:18 box kernel: [458131.324626] sr 34:0:0:0: Attached scsi generic sg2 type 5 Oct 31 23:40:18 box kernel: [458131.324781] sd 34:0:0:1: Attached scsi generic sg3 type 0 Oct 31 23:40:18 box kernel: [458131.357490] sd 34:0:0:1: [sdb] Attached SCSI removable disk # cat /var/log/usb_modeswitch_5-1\:1.0 USB_ModeSwitch log from Sun Oct 31 23:40:16 CET 2010 Using global config file: /etc/usb_modeswitch.conf raw args from udev: /5-1:1.0 Bus ID for device not given by udev. Trying to determine it from kernel name (5-1:1.0) ... USB dir exists: /sys/bus/usb/devices/5-1 ---------------- USB values from sysfs: manufacturer ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ product HUAWEI Mobile serial ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ ---------------- SCSI attributes not needed, moving on checking config: /etc/usb_modeswitch.d/12d1:1001 ! matched, now switching (running command: /usr/sbin/usb_modeswitch -I -W -c /etc/usb_modeswitch.d/12d1:1001) verbose output of usb_modeswitch: -------------------------------- usb_set_debug: Setting debugging level to 15 (on) usb_os_find_busses: Found 007 usb_os_find_busses: Found 006 usb_os_find_busses: Found 005 usb_os_find_busses: Found 004 usb_os_find_busses: Found 003 usb_os_find_busses: Found 002 usb_os_find_busses: Found 001 usb_os_find_devices: Found 001 on 007 usb_os_find_devices: Found 001 on 006 usb_os_find_devices: Found 001 on 005 usb_os_find_devices: Found 001 on 004 usb_os_find_devices: Found 001 on 003 usb_os_find_devices: Found 001 on 002 usb_os_find_devices: Found 001 on 001 Reading config file: /etc/usb_modeswitch.d/12d1:1001 * usb_modeswitch: handle USB devices with multiple modes * Version 1.1.4 (C) Josua Dietze 2010 * Based on libusb0 (0.1.12 and above) ! PLEASE REPORT NEW CONFIGURATIONS ! DefaultVendor= 0x12d1 DefaultProduct= 0x1001 TargetVendor= not set TargetProduct= not set TargetClass= 0xff TargetProductList="" DetachStorageOnly=0 HuaweiMode=1 SierraMode=0 SonyMode=0 GCTMode=0 MessageEndpoint= not set MessageContent="" NeedResponse=0 ResponseEndpoint= not set Interface=0x00 InquireDevice disabled Success check enabled, max. wait time 20 seconds System integration mode enabled Looking for target devices ... searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0002 searching devices, found USB ID 1d6b:0002 No devices in target mode or class found Looking for default devices ... searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0001 searching devices, found USB ID 1d6b:0002 searching devices, found USB ID 1d6b:0002 No devices in default mode or class found. Nothing to do. Bye. -------------------------------- (end of usb_modeswitch output) All done, exiting