Keystroke lag

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  • #14470

    A previous poster described a problem regarding keystroke lag, but no resolution was reached because s/he didn’t respond to requests for additional information. I’m having a similar problem. I’m connecting from a Win7 X64 Enterprise client to the physical display on a RHEL6 Linux server over a Cisco vpn. Both machines are reasonably fast multi-core i7’s with plenty of ram. After upgrading from the free version of NX3.5 to the latest 5.2, I was pleased to find that OpenGL applications that never ran correctly remotely with 3.5 now do! However, typing anything is painful,  since it can take anywhere from 1-3 seconds for a keystroke or a short (e.g. 4 letter) word to appear or pressing <ENTER> to take affect. This lag was never anywhere near this bad with 3.5 between the same 2 machines.

    In response to the information requested from the previous poster, the client (home) connect gives 117 bps upload and 6.1 bps download according to Ookla, while the Linux server gives 187 bps up and 645 down. Neither machine shows unsual cpu loads. The client is near 0% on all cpus, while the server shows around 35% of one of its cores consumed by nxnode.bin. Also, as requested, I’ve attached a copy of the display settings.

    In an attempt to narrow things down. I’ve tried a couple other experiments. 1) The client was updated to 5.2 first, while the server was still running 3.5. Connecting over ssh with this configuration didn’t show abnormal lag; that appeared only after the server was switched over also. 2) Another person in the same organization also switched over his systems to NX5.2 a while ago. He doesn’t see this problem with lag.  However, if I log in to his workstation / server with my login, I get exactly the same poor response as on my own machine.

    Any suggestions would be greatly appreciated!



    Hello ogm94,

    thanks for reporting this.

    If I understand:

    1. you and your colleague updated two different servers to NoMachine 5.2
    2. he didn’t got any problem with his server
    3. you experience the lag with your colleauge’s server as well as with yours

    Can you confirm?

    Could you provide information about the NoMachine products installed on the servers (Free Edition, Workstation, etc.)?

    The information about OpenGL applications let me think you used to work with “virtual desktops” in version 3.5 while you share the physical display of the server in version 5.2. Is that the case?

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