[madcat]

Не срабатывает. Вот фрагмент /var/log/message во время загрузки:
Mar 28 22:47:47 localhost kernel: usbcore: registered new driver usbfs
Mar 28 22:47:47 localhost kernel: usbcore: registered new driver hub
Mar 28 22:47:47 localhost kernel: USB Universal Host Controller Interface driver v2.2
Mar 28 22:47:47 localhost kernel: uhci_hcd 0000:00:11.2: UHCI Host Controller
Mar 28 22:47:47 localhost kernel: uhci_hcd 0000:00:11.2: irq 21, io base 0000e800
Mar 28 22:47:47 localhost kernel: uhci_hcd 0000:00:11.2: new USB bus registered, assigned bus number 1
Mar 28 22:47:47 localhost kernel: hub 1-0:1.0: USB hub found
Mar 28 22:47:47 localhost kernel: hub 1-0:1.0: 2 ports detected
Mar 28 22:47:47 localhost kernel: uhci_hcd 0000:00:11.3: UHCI Host Controller
Mar 28 22:47:47 localhost kernel: uhci_hcd 0000:00:11.3: irq 21, io base 0000e400
Mar 28 22:47:47 localhost kernel: uhci_hcd 0000:00:11.3: new USB bus registered, assigned bus number 2
Mar 28 22:47:47 localhost kernel: hub 2-0:1.0: USB hub found
Mar 28 22:47:47 localhost kernel: hub 2-0:1.0: 2 ports detected
Mar 28 22:47:47 localhost kernel: usb 1-1: new full speed USB device using address 2
Mar 28 22:47:47 localhost kernel: usb 1-2: new low speed USB device using address 3
Дальше идет загрузка модулей тв-тюнера saa7130

после команды insmod /lib/modules/.../class/cdc-acm.ko:
Mar 28 23:53:47 localhost kernel: usb 1-1: USB disconnect, address 2
Mar 28 23:53:50 localhost kernel: usb 1-1: new full speed USB device using address 4
Mar 28 23:53:54 localhost kernel: drivers/usb/class/cdc-acm.c: Ignoring extra header
Mar 28 23:53:54 localhost kernel: cdc_acm 1-1:1.0: ttyACM0: USB ACM device
Mar 28 23:53:54 localhost kernel: usbcore: registered new driver cdc_acm
Mar 28 23:53:54 localhost kernel: drivers/usb/class/cdc-acm.c: v0.23:USB Abstract Control Model driver for USB modems and ISDN adapters

А конфликт возникает если попробовать перегрузить модуль cdc-acm после дисконекта. Если этого не сделать - "Modem not ready".