Hello,
Recently I have upgraded from debian wheezy to debian jessie. I have in my machine an adapter MCS7830 and when I plug it on an USB port the cpu seems to get really busy, and getting a response from the gnome-terminal after a command like "sudo ifconfig" takes a long time. Right now I don't have much information about it, and all I can guess is that there is a problem with its driver, since in another machine with kernel 3.2.0-4-amd64 everything works properly.
Sometimes probing the device fails, like you can see below:
[ 3610.816817] usb 2-1.1: USB disconnect, device number 16
[ 3610.816913] MOSCHIP usb-ethernet driver 2-1.1:1.0 eth1: unregister 'MOSCHIP usb-ethernet driver' usb-0000:00:1d.0-1.1, MOSCHIP 7830/7832/7730 usb-NET adapter
[ 6003.187995] usb 2-1.1: new high-speed USB device number 17 using ehci-pci
[ 6003.284422] usb 2-1.1: New USB device found, idVendor=9710, idProduct=7830
[ 6003.284426] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 6003.284429] usb 2-1.1: Product: USB-MAC Controller
[ 6003.284431] usb 2-1.1: Manufacturer: Moschip Semiconductor
[ 6003.284433] usb 2-1.1: SerialNumber: 3b00109a
[ 6008.353466] usb 2-1.1: Cannot set autoneg
[ 6008.353476] MOSCHIP usb-ethernet driver: probe of 2-1.1:1.0 failed with error -110
Sometimes it is registered successfully, but when it does happen I almost unable to operate my PC:
[ 6104.392661] usb 2-1.1: USB disconnect, device number 17
[ 6105.615395] usb 2-1.1: new high-speed USB device number 18 using ehci-pci
[ 6105.711810] usb 2-1.1: New USB device found, idVendor=9710, idProduct=7830
[ 6105.711815] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 6105.711817] usb 2-1.1: Product: USB-MAC Controller
[ 6105.711819] usb 2-1.1: Manufacturer: Moschip Semiconductor
[ 6105.711821] usb 2-1.1: SerialNumber: 3b00109a
[ 6105.783901] usb 2-1.1: applying rev.C fixup
[ 6105.791396] usb 2-1.1: applying rev.C fixup
[ 6105.800299] MOSCHIP usb-ethernet driver 2-1.1:1.0 eth1: register 'MOSCHIP usb-ethernet driver' at usb-0000:00:1d.0-1.1, MOSCHIP 7830/7832/7730 usb-NET adapter, 00:13:3b:00:10:9a
Regards,
Pedro Bianchi