Hello,
About the USB issue. How did you install the 4.2.27? Did you do an update or completely removed 4.2.26 and then installed 4.2.27? Also could you install 4.2.27 again and check if the USB module was built (check if this file exists: /usr/NX/bin/drivers/nxusb.ko). If not – please go (as root) to /usr/NX/share/src/nxusb/ and execute “make”. If there are errors, please send us the whole output of this command. Thanks.