How do I get the camera of the Lenovo ThinkPad to stop making a sound when I take a picture?
You're root, you could replace the sound files with silent clips. This is what I've found:

find /system -name '*ogg' | grep cam
/system/media/audio/ui/camera_click.ogg
/system/media/audio/ui/camera_focus.ogg


Audacity is a free and open editor to create an empty or  silent sample and export it as an ogg file.

EDIT: According to this question/answer you can also delete or rename the camera_click.ogg file. Plus: Before you do, you need to

mount -oremount,rw /system
[remove/edit the above ogg files]
mount -oremount,ro /system