Known issues of Debian on QNAP TS-109 Here is a list of known issues and bugs with Debian on the QNAP TS-109: The installer fails to make the system bootable, especially on configurations with LVM and RAID. You can apply a workaround. qcontrol (the tool to control LEDs and beeper) doesn't work. On fanless QNAP systems (TS-109 and TS-109 II), fan errors are reported. There is a patch for this issue.