I have same problem. In order to temporary solve it I used answer from here http://askubuntu.com/questions/626207/unable-to-connect-to-the-internet- on-a-ubuntu-14-0-4-laptop-using-ztereliance-c
And automated changes by adding a rule for usb_modeswitch. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1317552 Title: usb modem doesn't recognized by system until wired network connected Status in network-manager package in Ubuntu: Confirmed Bug description: I have an usb 3g modem huawei, configured as standalone network device. When I connect it, dmesg shows some error messages, but nothing happens. After connect and futher disconnect wired network (eth0), it succesful recognized by the system as eth1 device and all works fine. Problem is that sometimes I have no wired network to start usb-3g connection this way. Part of dmesg with connect/disconnect manipulations [ 27.606224] init: libvirt-bin main process (979) terminated with status 127 [ 27.606239] init: libvirt-bin main process ended, respawning [ 27.915799] r8169 0000:01:00.0 eth0: link down [ 27.915869] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 27.916229] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 27.938186] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 27.941688] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 28.566084] usb 1-1.1: New USB device found, idVendor=0cf3, idProduct=0036 [ 28.566089] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 28.775155] init: plymouth-upstart-bridge main process ended, respawning [ 34.989561] FAT-fs (sdb1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. [ 55.380263] usb 3-3: new high-speed USB device number 3 using xhci_hcd [ 55.397190] usb 3-3: New USB device found, idVendor=12d1, idProduct=1f01 [ 55.397202] usb 3-3: New USB device strings: Mfr=2, Product=1, SerialNumber=0 [ 55.397207] usb 3-3: Product: HUAWEI HiLink [ 55.397212] usb 3-3: Manufacturer: HUAWEI [ 55.465739] usb-storage 3-3:1.0: USB Mass Storage device detected [ 55.465795] scsi7 : usb-storage 3-3:1.0 [ 55.465865] usbcore: registered new interface driver usb-storage [ 56.464794] scsi 7:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 [ 56.472835] sr1: scsi-1 drive [ 56.472989] sr 7:0:0:0: Attached scsi CD-ROM sr1 [ 56.473080] sr 7:0:0:0: Attached scsi generic sg3 type 5 [ 56.558838] audit_printk_skb: 156 callbacks suppressed [ 56.558842] type=1400 audit(1399561168.962:64): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=2017 comm="apparmor_parser" [ 56.558850] type=1400 audit(1399561168.962:65): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2017 comm="apparmor_parser" [ 56.559369] type=1400 audit(1399561168.962:66): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2017 comm="apparmor_parser" [ 56.638660] Buffer I/O error on device sr1, logical block 0 [ 56.638668] Buffer I/O error on device sr1, logical block 0 [ 56.638685] Buffer I/O error on device sr1, logical block 0 [ 56.638693] Buffer I/O error on device sr1, logical block 0 [ 56.638701] Buffer I/O error on device sr1, logical block 1 [ 56.638708] Buffer I/O error on device sr1, logical block 1 [ 56.638716] Buffer I/O error on device sr1, logical block 512 [ 56.640490] systemd-udevd[2001]: Failed to apply ACL on /dev/sr1: No such file or directory [ 56.640501] systemd-udevd[2001]: Failed to apply ACL on /dev/sr1: No such file or directory [ 56.651401] systemd-udevd[1987]: Failed to apply ACL on /dev/sr1: No such file or directory [ 56.651427] systemd-udevd[1987]: Failed to apply ACL on /dev/sr1: No such file or directory [ 107.810564] usb 3-3: USB disconnect, device number 3 [ 116.952712] usb 3-3: new high-speed USB device number 4 using xhci_hcd [ 116.969698] usb 3-3: New USB device found, idVendor=12d1, idProduct=1f01 [ 116.969709] usb 3-3: New USB device strings: Mfr=2, Product=1, SerialNumber=0 [ 116.969715] usb 3-3: Product: HUAWEI HiLink [ 116.969720] usb 3-3: Manufacturer: HUAWEI [ 116.971391] usb-storage 3-3:1.0: USB Mass Storage device detected [ 116.971653] scsi8 : usb-storage 3-3:1.0 [ 117.969336] scsi 8:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 [ 117.971006] sr1: scsi-1 drive [ 117.971389] sr 8:0:0:0: Attached scsi CD-ROM sr1 [ 117.974632] sr 8:0:0:0: Attached scsi generic sg3 type 5 [ 118.063825] quiet_error: 1 callbacks suppressed [ 118.063836] Buffer I/O error on device sr1, logical block 9 [ 118.063849] Buffer I/O error on device sr1, logical block 9 [ 118.063943] Buffer I/O error on device sr1, logical block 0 [ 118.063951] Buffer I/O error on device sr1, logical block 0 [ 118.063970] Buffer I/O error on device sr1, logical block 2 [ 118.063978] Buffer I/O error on device sr1, logical block 2 [ 118.063991] Buffer I/O error on device sr1, logical block 0 [ 118.064004] Buffer I/O error on device sr1, logical block 0 [ 118.064021] Buffer I/O error on device sr1, logical block 0 [ 118.064036] Buffer I/O error on device sr1, logical block 1 [ 118.069131] systemd-udevd[2224]: Failed to apply ACL on /dev/sr1: No such file or directory [ 118.069143] systemd-udevd[2224]: Failed to apply ACL on /dev/sr1: No such file or directory [ 118.073776] systemd-udevd[2224]: Failed to apply ACL on /dev/sr1: No such file or directory [ 118.073788] systemd-udevd[2224]: Failed to apply ACL on /dev/sr1: No such file or directory [ 185.892567] r8169 0000:01:00.0 eth0: link up [ 185.892589] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 189.653532] r8169 0000:01:00.0 eth0: link down [ 194.156060] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 214.512890] usb 3-3: USB disconnect, device number 4 [ 224.968105] usb 3-3: new high-speed USB device number 5 using xhci_hcd [ 224.985171] usb 3-3: New USB device found, idVendor=12d1, idProduct=1f01 [ 224.985182] usb 3-3: New USB device strings: Mfr=2, Product=1, SerialNumber=0 [ 224.985188] usb 3-3: Product: HUAWEI HiLink [ 224.985192] usb 3-3: Manufacturer: HUAWEI [ 224.987223] usb-storage 3-3:1.0: USB Mass Storage device detected [ 224.987477] scsi9 : usb-storage 3-3:1.0 [ 225.984189] scsi 9:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 [ 225.985842] sr1: scsi-1 drive [ 225.986758] sr 9:0:0:0: Attached scsi CD-ROM sr1 [ 225.989684] sr 9:0:0:0: Attached scsi generic sg3 type 5 [ 226.092064] quiet_error: 4 callbacks suppressed [ 226.092076] Buffer I/O error on device sr1, logical block 8 [ 226.092089] Buffer I/O error on device sr1, logical block 8 [ 226.092153] Buffer I/O error on device sr1, logical block 0 [ 226.092161] Buffer I/O error on device sr1, logical block 0 [ 226.092180] Buffer I/O error on device sr1, logical block 2 [ 226.092187] Buffer I/O error on device sr1, logical block 2 [ 226.092200] Buffer I/O error on device sr1, logical block 0 [ 226.092214] Buffer I/O error on device sr1, logical block 0 [ 226.092230] Buffer I/O error on device sr1, logical block 0 [ 226.092246] Buffer I/O error on device sr1, logical block 1 [ 226.095748] systemd-udevd[2501]: Failed to apply ACL on /dev/sr1: No such file or directory [ 226.095772] systemd-udevd[2501]: Failed to apply ACL on /dev/sr1: No such file or directory [ 226.254225] usb 3-3: USB disconnect, device number 5 [ 226.395979] systemd-udevd[2501]: Failed to apply ACL on /dev/sr1: No such file or directory [ 226.396004] systemd-udevd[2501]: Failed to apply ACL on /dev/sr1: No such file or directory [ 226.994443] usb 3-3: new high-speed USB device number 6 using xhci_hcd [ 227.011625] usb 3-3: New USB device found, idVendor=12d1, idProduct=14db [ 227.011637] usb 3-3: New USB device strings: Mfr=2, Product=1, SerialNumber=0 [ 227.011644] usb 3-3: Product: HUAWEI HiLink [ 227.011648] usb 3-3: Manufacturer: HUAWEI [ 227.015179] cdc_ether 3-3:1.0 eth1: register 'cdc_ether' at usb-0000:00:14.0-3, CDC Ethernet Device, 58:2c:80:13:92:63 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: network-manager 0.9.8.8-0ubuntu7 ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 Date: Fri May 9 00:08:31 2014 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2014-04-27 (10 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) IpRoute: default via 192.168.1.1 dev eth0 proto static 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.103 metric 1 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.100 metric 1 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ProcEnviron: LANGUAGE=ru TERM=xterm PATH=(custom, no user) LANG=ru_RU.UTF-8 SHELL=/bin/bash SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2014-05-04T16:25:42.688173 nmcli-dev: DEVICE TYPE STATE DBUS-PATH eth1 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/2 wlan0 802-11-wireless disconnected /org/freedesktop/NetworkManager/Devices/1 eth0 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/0 nmcli-nm: RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN running 0.9.8.8 connected enabled enabled enabled enabled disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1317552/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post 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