Como lidar com um dongle 3G problemático

Question

Tenho um antigo modem USB 3G e gostaria de saber se está a morrer porque não é fiável. Conectando-se dá o seguinte ( /var/log/syslog ):

Feb 18 22:39:56 thome kernel: [ 5310.999854] usb 1-2: new full-speed USB device number 38 using xhci_hcd
Feb 18 22:39:56 thome mtp-probe: checking bus 1, device 38: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2"
Feb 18 22:39:56 thome kernel: [ 5311.017000] usb 1-2: New USB device found, idVendor=12d1, idProduct=1003
Feb 18 22:39:56 thome kernel: [ 5311.017004] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Feb 18 22:39:56 thome kernel: [ 5311.017005] usb 1-2: Product: HUAWEI Mobile
Feb 18 22:39:56 thome kernel: [ 5311.017007] usb 1-2: Manufacturer: HUAWEI Technologies
Feb 18 22:39:56 thome mtp-probe: bus: 1, device: 38 was not an MTP device
Feb 18 22:39:56 thome kernel: [ 5311.017625] usb-storage 1-2:1.0: USB Mass Storage device detected
Feb 18 22:39:56 thome kernel: [ 5311.017976] scsi68 : usb-storage 1-2:1.0
Feb 18 22:39:56 thome kernel: [ 5311.019304] usb 1-2: USB disconnect, device number 38
Feb 18 22:39:56 thome systemd[1]: Starting USB_ModeSwitch...
Feb 18 22:39:56 thome systemd[1]: Started USB_ModeSwitch.
Feb 18 22:39:56 thome udisks-daemon[1319]: **** scsi_host ADDING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/host68/scsi_host/host68
Feb 18 22:39:56 thome udisks-daemon[1319]: **** scsi_host IGNORING ADD /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/host68/scsi_host/host68
Feb 18 22:39:56 thome udisks-daemon[1319]: **** scsi_host IGNORING REMOVE /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/host68/scsi_host/host68
Feb 18 22:39:56 thome kernel: [ 5311.459645] usb 1-2: new full-speed USB device number 39 using xhci_hcd
Feb 18 22:39:56 thome kernel: [ 5311.476931] usb 1-2: New USB device found, idVendor=12d1, idProduct=1003
Feb 18 22:39:56 thome kernel: [ 5311.476934] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Feb 18 22:39:56 thome kernel: [ 5311.476936] usb 1-2: Product: HUAWEI Mobile
Feb 18 22:39:56 thome kernel: [ 5311.476937] usb 1-2: Manufacturer: HUAWEI Technologies
Feb 18 22:39:56 thome kernel: [ 5311.477745] usb-storage 1-2:1.0: USB Mass Storage device detected
Feb 18 22:39:56 thome kernel: [ 5311.477918] option 1-2:1.0: GSM modem (1-port) converter detected
Feb 18 22:39:56 thome kernel: [ 5311.477988] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB0
Feb 18 22:39:56 thome kernel: [ 5311.478274] usb-storage 1-2:1.1: USB Mass Storage device detected
Feb 18 22:39:56 thome kernel: [ 5311.478323] option 1-2:1.1: GSM modem (1-port) converter detected
Feb 18 22:39:56 thome kernel: [ 5311.478372] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB1
Feb 18 22:39:56 thome kernel: [ 5311.478414] usb-storage 1-2:1.2: USB Mass Storage device detected
Feb 18 22:39:56 thome kernel: [ 5311.478554] scsi71 : usb-storage 1-2:1.2
Feb 18 22:39:56 thome mtp-probe: checking bus 1, device 39: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2"
Feb 18 22:39:56 thome mtp-probe: bus: 1, device: 39 was not an MTP device
Feb 18 22:39:56 thome systemd[1]: Starting USB_ModeSwitch...
Feb 18 22:39:56 thome udisks-daemon[1319]: **** scsi_host ADDING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/scsi_host/host71
Feb 18 22:39:56 thome udisks-daemon[1319]: **** scsi_host IGNORING ADD /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/scsi_host/host71
Feb 18 22:39:56 thome systemd[1]: Started USB_ModeSwitch.
Feb 18 22:39:57 thome kernel: [ 5312.476715] scsi 71:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 2
Feb 18 22:39:57 thome kernel: [ 5312.482692] sr0: scsi-1 drive
Feb 18 22:39:57 thome kernel: [ 5312.482844] sr 71:0:0:0: Attached scsi CD-ROM sr0
Feb 18 22:39:57 thome kernel: [ 5312.482916] sr 71:0:0:0: Attached scsi generic sg2 type 5
Feb 18 22:39:57 thome kernel: [ 5312.505690] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 28 ep 6 with no TDs queued?
Feb 18 22:39:58 thome udisks-daemon[1319]: **** ADDING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome udisks-daemon[1319]: **** UPDATING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome udisks-daemon[1319]: **** ADDED /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome udisks-daemon[1319]: **** EMITTING ADDED for /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome kernel: [ 5312.534063] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 28 ep 6 with no TDs queued?
Feb 18 22:39:58 thome udisks-daemon[1319]: **** CHANGING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome udisks-daemon[1319]: **** UPDATING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome udisks-daemon[1319]: **** EMITTING CHANGED for /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome udisks-daemon[1319]: **** CHANGED /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:39:58 thome org.gtk.Private.UDisks2VolumeMonitor[1200]: ### debug: emit_signal: 0x1cf01b0
Feb 18 22:40:02 thome kernel: [ 5316.956198] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 28 ep 6 with no TDs queued?
Feb 18 22:40:02 thome udisks-daemon[1319]: **** CHANGING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:40:02 thome udisks-daemon[1319]: **** UPDATING /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:40:02 thome udisks-daemon[1319]: **** EMITTING CHANGED for /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:40:02 thome udisks-daemon[1319]: **** CHANGED /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/host71/target71:0:0/71:0:0:0/block/sr0
Feb 18 22:40:02 thome org.gtk.Private.UDisks2VolumeMonitor[1200]: ### debug: emit_signal: 0x1cf01b0

Ele não funciona (isto é, não está disponível via nm-applet para que eu possa conectar-me à internet). Eu vi esse problema em duas máquinas Debian separadas. A única solução confiável para esse problema é reinicializar a máquina: (

    

Answer 1

Esse log se parece com o efeito que eu recebo ao puxar uma unidade USB sem desmontar e reinserir. Fazer isso também remonta o USB no novo número de dispositivo.

O seu modem 3G provavelmente tem um armazenamento embutido (para o driver (windows)), então se isso acontecer sem você tirar o modem, isso pode indicar contatos ruins no conector USB ou uma conexão quase quebrada dentro do modem .

Eu tentaria limpar os conectores com um cotonete (achatado, se possível, se tivesse tubo de plástico oco), com uma quantidade muito pequena de álcool.

Se algo estiver (quase) quebrado dentro do modem, provavelmente há pouco que você possa fazer. Eu não vi nenhum que você não teria que abrir, porque nenhum deles tinha parafusos acessíveis. Eu quebrei um modem HUAWEI aberto e ele não iria remontar, e eu não consegui fazer nenhuma solda significativa no pequeno painel interno.