For normal user the message displayed is “You have a Logitech Mouse connected, and libusb was found at compile time, but it was not possible to access this mouse. This is probably caused by a permission problem - you should consult the manual on how to fix this.”
You can change the dpi value to 800dpi using super-user or root account. But would like to set it at boot time or by the user so it also remembers the setting. Xset and xinput methods doesn’t seem to give the same result as setting the dpi value.