Cannot access galaxy nexus via adb

Yesterday my noble Galaxy Nexus (maguro) sacrificed itself to save me when I fell from my mountain bike. I would like to copy the data to my computer. What is good: the screen and the sim card is broken, but the rest of the phone seems to be still working. When I plug in the phone on my Linux (Debian) computer, it is detected as multimedia device. However, I cannot access the data, as I would need to unlock the screen (which is broken). Alternatively, I tried to access the phone using the adb-tools. However, the device is not listed: $ ./adb devices List of devices attached $ I can see my phone in lsusb: $ lsusb ... Bus 006 Device 002: ID 04e8:685c Samsung Electronics Co., Ltd GT-I9250 Phone [Galaxy Nexus] ... I tried some different stuff, like generating a /etc/udev/rules.d/51-android.rules file, but this didn't help. I also tried to boot the phone to the bootloader, but I didn't succeed - maybe the connection to the volume buttons is broken. Some additional information that may help: my Galaxy Nexus runs AOKP and Clockworkmod is installed.