Eu consegui trabalhar no ASUS entrando no BIOS e desativando o xhci. Então é definitivamente algo errado com a funcionalidade xhci em conjunto com usb_modeswitch / option. Então não usb 3.0 amor por mim até que esta questão seja resolvida: (
Saída da ASME dmesg:
[ 199.903558] usb 2-1.2: new high-speed USB device number 3 using ehci_hcd
[ 200.362841] Initializing USB Mass Storage driver...
[ 200.363104] scsi6 : usb-storage 2-1.2:1.0
[ 200.363319] usbcore: registered new interface driver usb-storage
[ 200.363326] USB Mass Storage support registered.
[ 200.368504] usbcore: registered new interface driver uas
[ 201.362896] scsi 6:0:0:0: Direct-Access ALCATEL Mass Storage 2.31 PQ: 0 ANSI: 2
[ 201.363623] scsi 6:0:0:1: CD-ROM ALCATEL Mass Storage 2.31 PQ: 0 ANSI: 2
[ 201.365534] sd 6:0:0:0: Attached scsi generic sg3 type 0
[ 201.367932] sd 6:0:0:0: [sdc] Attached SCSI removable disk
[ 201.372133] sr1: scsi-1 drive
[ 201.373843] sr 6:0:0:1: Attached scsi CD-ROM sr1
[ 201.374064] sr 6:0:0:1: Attached scsi generic sg4 type 5
[ 201.544644] usb 2-1.2: USB disconnect, device number 3
[ 201.808647] usb 2-1.2: new high-speed USB device number 4 using ehci_hcd
[ 202.264289] option 2-1.2:1.0: GSM modem (1-port) converter detected
[ 202.264630] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 202.264915] option 2-1.2:1.1: GSM modem (1-port) converter detected
[ 202.265222] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 202.265512] option 2-1.2:1.2: GSM modem (1-port) converter detected
[ 202.265834] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 202.266098] option 2-1.2:1.3: GSM modem (1-port) converter detected
[ 202.266355] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB3
[ 202.266582] option 2-1.2:1.4: GSM modem (1-port) converter detected
[ 202.266817] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB4
[ 202.267021] option 2-1.2:1.5: GSM modem (1-port) converter detected
[ 202.267252] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB5
[ 202.267460] option 2-1.2:1.6: GSM modem (1-port) converter detected
[ 202.267629] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB6
[ 272.095114] usb 2-1.2: USB disconnect, device number 4
[ 272.095476] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 272.095523] option 2-1.2:1.0: device disconnected
[ 272.096378] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 272.096486] option 2-1.2:1.1: device disconnected
[ 272.097240] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 272.097377] option 2-1.2:1.2: device disconnected
[ 272.098003] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 272.098083] option 2-1.2:1.3: device disconnected
[ 272.098637] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
[ 272.098716] option 2-1.2:1.4: device disconnected
[ 272.098957] option: option_instat_callback: error -108
[ 272.099359] option1 ttyUSB5: GSM modem (1-port) converter now disconnected from ttyUSB5
[ 272.099406] option 2-1.2:1.5: device disconnected
[ 272.099629] option: option_instat_callback: error -108
[ 272.099895] option1 ttyUSB6: GSM modem (1-port) converter now disconnected from ttyUSB6
[ 272.099908] option 2-1.2:1.6: device disconnected