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The system sees something is plugged in when I plug and unplug it: bluehat@Matapan:/dev$ tail -f /var/log/syslog Mar 23 15:36:35 Matapan kernel: [156082.112874] usb 7-1: new full speed USB device using uhci_hcd and address 6 Mar 23 15:47:19 Matapan kernel: [156726.248081] usb 7-1: USB disconnect, address 6 Mar 23 15:47:29 Matapan kernel: [156736.200148] usb 6-1: new full speed USB device using uhci_hcd and address 3 AVRISP MKII should rely on cdc-acm: bluehat@Matapan:/dev$ modinfo cdc-acm -V module-init-tools version 3.12 So it should be able to see it just fine, and yet I am unable to write to it. avrdude -p m1280 -c avrispmkII -P usb -U test.hex Returns avrdude: usb_open(): cannot read serial number "error sending control message: Operation not permitted" avrdude: usb_open(): cannot read product name "error sending control message: Operation not permitted" avrdude: usbdev_open(): error setting configuration 1: could not set config 1: Operation not permitted avrdude: usbdev_open(): did not find any USB device "usb"

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