There is a problem with the Xposed Framework on 4.4.4. After reinstalling it, it “worked”.
Screenshot
Update: I was playing around with “nl_ns_android_activity-285” (Reisplanner NL/4.2.5) and get a lot less error messages now. Not sure if it will run stable, but I don’t see any strange error messages.
Update 2: I guess my FP1 usb-port will soon be dead 
[747586.903987] usb 1-4: USB disconnect, device number 83
[747587.175764] usb 1-4: new full-speed USB device number 84 using xhci_hcd
[747587.287713] usb 1-4: device descriptor read/64, error -71
[747587.503546] usb 1-4: device descriptor read/64, error -71
[747587.719459] usb 1-4: new full-speed USB device number 85 using xhci_hcd
[747587.831406] usb 1-4: device descriptor read/64, error -71
[747588.047283] usb 1-4: device descriptor read/64, error -71
[747588.263152] usb 1-4: new full-speed USB device number 86 using xhci_hcd
[747588.263287] usb 1-4: Device not responding to setup address.
[747588.467158] usb 1-4: Device not responding to setup address.
[747588.670909] usb 1-4: device not accepting address 86, error -71
[747782.573767] usb 1-4: new full-speed USB device number 88 using xhci_hcd
[747782.685713] usb 1-4: device descriptor read/64, error -71
[747782.901590] usb 1-4: device descriptor read/64, error -71
[747783.117459] usb 1-4: new high-speed USB device number 89 using xhci_hcd
[747783.245924] usb 1-4: New USB device found, idVendor=0bb4, idProduct=0c02
[747783.245927] usb 1-4: New USB device strings: Mfr=2, Product=3, SerialNumber=4
[747783.245928] usb 1-4: Product: MT65xx Android Phone
[747783.245929] usb 1-4: Manufacturer: MediaTek
[747783.245929] usb 1-4: SerialNumber: XXXXXX
[747783.992424] usb 1-4: USB disconnect, device number 89