Can you please provide more info:
– What is the nx process with high CPU usage?
See below the top output before connection
top – 20:04:54 up 8 min, 2 users, load average: 0.10, 0.32, 0.22
Tasks: 299 total, 1 running, 296 sleeping, 0 stopped, 2 zombie
%Cpu(s): 1.9 us, 0.4 sy, 0.0 ni, 97.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem: 4041052 total, 1744840 used, 2296212 free, 68872 buffers
KiB Swap: 2094076 total, 0 used, 2094076 free. 806240 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1200 root 20 0 276848 69032 13520 S 5.3 1.7 0:17.79 Xorg
1075 deluge 20 0 389384 25508 7160 S 2.0 0.6 0:09.46 deluged
And after Connection
top – 20:08:16 up 11 min, 2 users, load average: 0.26, 0.22, 0.20
Tasks: 302 total, 2 running, 298 sleeping, 0 stopped, 2 zombie
%Cpu(s): 28.3 us, 3.9 sy, 0.0 ni, 67.6 id, 0.0 wa, 0.2 hi, 0.0 si, 0.0 st
KiB Mem: 4041052 total, 1992604 used, 2048448 free, 69260 buffers
KiB Swap: 2094076 total, 0 used, 2094076 free. 865564 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2703 wes 0 -20 2651264 147540 63728 S 78.9 3.7 0:20.29 nxnode.bin
1200 root 20 0 306556 97668 35036 S 37.5 2.4 0:29.93 Xorg
– Does the CPU usage remain high when there are no visible updates in the session?
Yes as long as a connection is established even if idle the cpu is high
– NoMachine product and version on local and remote machine (free version, Workstation, etc).
As stated above the no machine server version is 4.22 installed on xubunutu 14, connection from windows,Mac or linux has the same effect
– Whether the problem arises connecting to a physical or a virtual display.
Both