<div dir="ltr">Why not just disable DPMS (<span style="color:rgb(84,84,84);font-family:Roboto,arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Display Power Management Signaling) </span>support? <div><a href="https://github.com/ArcticaProject/nx-libs/issues/671#issuecomment-370715419">https://github.com/ArcticaProject/nx-libs/issues/671#issuecomment-370715419</a><br></div><div><br></div><div>So a command like: <span style="color:rgb(106,115,125);font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,Courier,monospace;font-size:11.9px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgba(27,31,35,0.05);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">/usr/bin/xset -dpms s off s noblank s 0 0 s noexpose -dpms</span></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Mar 6, 2018 at 9:03 AM, Mario Theodoridis <span dir="ltr"><<a href="mailto:mario@schmut.com" target="_blank">mario@schmut.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
    <div class="m_5080112862898418068moz-cite-prefix">On 06/03/18 14:18, martti pitkanen
      wrote:<br>
    </div>
    <blockquote type="cite">
      
      <p>Hi,</p>
      <p>Is there hands-on instructions how to downgrade to Saimaa in
        Ubuntu (4.13.0-)?<br>
        X2Go sessions terminate in random way.<br>
      </p>
    </blockquote>
    Yes.<br>
    <br>
    This is what i just did more or less following Stefans advice.<br>
    <br>
    <br>
    sudo mv x2go-stable-trusty.list x2go-stable-trusty.list.not<br>
    sudo add-apt-repository ppa:x2go/saimaa<br>
    sudo apt-get update<br>
    <br>
    sudo apt-get remove libnx-x11-6:i386 nxagent nxproxy nx-x11-common
    x2goclient x2goserver* libx2go-log-perl libx2go-server-db-perl
    libx2go-server-perl libxcomp3:i386 libxcompshad3:i386<br>
    sudo apt-get install x2goserver x2goserver-xsession<br>
    <br>
    This leaves me with<br>
    <br>
     dpkg -l | egrep "(x2go|nx)" | sort <br>
    ii  libjs-sphinxdoc               <wbr>                             
    1.2.2+dfsg-1ubuntu1.1         <wbr>               all          JavaScript
    support for Sphinx documentation<br>
    ii  libnx-x11-6:i386              <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    client-side library<br>
    ii  libnx-xcomposite1:i386        <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    Composite extension library<br>
    ii  libnx-xdamage1:i386           <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    damaged region extension library<br>
    ii  libnx-xdmcp6:i386             <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    Display Manager Control Protocol library<br>
    ii  libnx-xext6:i386              <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    miscellaneous extension library<br>
    ii  libnx-xfixes3:i386            <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    miscellaneous 'fixes' extension library<br>
    ii  libnx-xinerama1:i386          <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    Xinerama extension library<br>
    ii  libnx-xpm4:i386               <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    pixmap library<br>
    ii  libnx-xrandr2:i386            <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    RandR extension library<br>
    ii  libnx-xrender1:i386           <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    Rendering Extension client library<br>
    ii  libnx-xtst6:i386              <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    Testing -- Record extension library<br>
    ii  libxcomp3:i386                <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    compression library<br>
    ii  libxcompext3:i386             <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    protocol compression extensions library<br>
    ii  libxcompshad3:i386            <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         nx-X11
    shadowing library<br>
    ii  nxagent                       <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      i386         NX agent<br>
    ii  nx-x11-common                 <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      all          nx-X11
    (common files)<br>
    ii  qtcreator-plugin-qnx:i386     <wbr>                             
    3.0.1+14.04.20140410.1-<wbr>0ubuntu1              i386         QNX plugin
    for Qt Creator IDE<br>
    ii  x2goagent                     <wbr>                             
    2:3.5.0.33-0~201711080756~<wbr>ubuntu14.04.1      all          X2Go agent<br>
    ii  x2goserver                    <wbr>                             
    4.0.1.21-0~201711081403~<wbr>ubuntu14.04.1        i386         X2Go
    server daemon scripts<br>
    ii  x2goserver-extensions         <wbr>                             
    4.0.1.21-0~201711081403~<wbr>ubuntu14.04.1        all          X2Go
    server daemon scripts (extensions)<br>
    ii  x2goserver-xsession           <wbr>                             
    4.0.1.21-0~201711081403~<wbr>ubuntu14.04.1        all          X2Go
    server daemon scripts (Xsession runner)<br>
    rc  libx2go-server-db-perl        <wbr>                             
    4.1.0.0-0~1517~ubuntu14.04.1  <wbr>               i386         Perl
    X2Go::Server:DB package<br>
    rc  x2goclient                    <wbr>                             
    4.1.1.1-0~1719~ubuntu14.04.1  <wbr>               i386         X2Go
    Client application (Qt4)<br>
    rc  x2goserver-common             <wbr>                             
    4.1.0.0-0~1517~ubuntu14.04.1  <wbr>               i386         X2Go
    Server (common files)<br>
    rc  x2goserver-fmbindings         <wbr>                             
    4.1.0.0-0~1517~ubuntu14.04.1  <wbr>               all          X2Go
    Server (file manager bindings)<br>
    rc  x2goserver-printing           <wbr>                             
    4.1.0.0-0~1517~ubuntu14.04.1  <wbr>               all          X2Go
    server (printing support)<br>
    rc  x2goserver-x2goagent          <wbr>                             
    4.1.0.0-0~1517~ubuntu14.04.1  <wbr>               all          X2Go
    Server's X2Go Agent<br>
    <br>
    Unfortunately i can no longer connect. It connects then disconnects.<br>
    This is the session log<br>
    <br>
    $ cat /tmp/.x2go-mario/C-mario-56-<wbr>1520344207_stDKDE_dp24/<wbr>session.log
    <br>
    <br>
    running as X2Go Agent<br>
    <br>
    NXAGENT - Version 3.5.0<br>
    <br>
    Copyright (C) 2001, 2011 NoMachine.<br>
    See <a class="m_5080112862898418068moz-txt-link-freetext" href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.nomachine.com_&d=DwMDaQ&c=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM&r=X0jL9y0sL4r4iU_qVtR3lLNo4tOL1ry_m7-psV3GejY&m=QIgSLcrrTCJMhj7NUXO5ONPfj88R2_ITBC9GBjYBhPs&s=2u4IUoHqO415txvlxTBJsjNODklSt7ma_Uv3dIAYYxU&e=" target="_blank">http://www.nomachine.com/</a> for more information.<br>
    <br>
    Info: Agent running with pid '6173'.<br>
    Session: Starting session at 'Tue Mar  6 14:50:08 2018'.<br>
    Info: Proxy running in server mode with pid '6173'.<br>
    Info: Waiting for connection from 'localhost' on port '52991'.<br>
    Info: Accepted connection from '127.0.0.1'.<br>
    Info: Connection with remote proxy completed.<br>
    Info: Using WAN link parameters 1408/24/1/0.<br>
    Info: Using agent parameters 5000/5/50/0/0.<br>
    Info: Using cache parameters 4/4096KB/8192KB/8192KB.<br>
    Info: Using pack method '16m-jpeg-9' with session
    'unix-kde-depth_24'.<br>
    Info: Using ZLIB data compression 1/1/32.<br>
    Info: Using ZLIB stream compression 1/1.<br>
    Info: No suitable cache file found.<br>
    Info: Listening to X11 connections on display ':56'.<br>
    Error: Aborting session with 'Unable to open display
'nx/nx,options=/tmp/.x2go-<wbr>mario/C-mario-56-1520344207_<wbr>stDKDE_dp24/options:56''.<br>
    Session: Aborting session at 'Tue Mar  6 14:50:09 2018'.<br>
    Session: Session aborted at 'Tue Mar  6 14:50:09 2018'.<br>
    Warning: Signals were not blocked in process with pid '6173'.<br>
    Info: Your session has died before reaching an usable state.<br>
    Info: This can be due to the remote X server refusing access to the
    client.<br>
    Info: Please check the authorization provided by your X application.<br>
    Info: Waiting the cleanup timeout to complete.<br>
    <br>
    Other logs have the following:<br>
    <br>
    $ sudo xtail /var/log/syslog /var/log/auth.log
    /var/log/ConsoleKit/history<br>
    *** /var/log/auth.log ***<br>
    Mar  6 14:50:04 lindev sshd[5665]: Accepted password for mario from
    192.168.11.6 port 35874 ssh2<br>
    Mar  6 14:50:04 lindev sshd[5665]: pam_unix(sshd:session): session
    opened for user mario by (uid=0)<br>
    <br>
    *** /var/log/syslog ***<br>
    Mar  6 14:50:04 lindev console-kit-daemon[2143]: GLib-CRITICAL:
    Source ID 64 was not found when attempting to remove it<br>
    <br>
    *** /var/log/ConsoleKit/history ***<br>
    1520344204.337 type=SEAT_ADDED : seat-id='Seat6' seat-kind=1<br>
    1520344204.339 type=SEAT_SESSION_ADDED : seat-id='Seat6'
    session-id='Session5' session-type='' session-x11-display=''
    session-x11-display-device='' session-display-device='/dev/<wbr>ssh'
    session-remote-host-name='<a href="http://fatty.de.regify.com" target="_blank">fatt<wbr>y.de.regify.com</a>'
    session-is-local=FALSE session-unix-user=1000
    session-creation-time='2018-<wbr>03-06T13:50:04.336908Z'<br>
    1520344204.512 type=SEAT_ADDED : seat-id='Seat7' seat-kind=1<br>
    1520344204.514 type=SEAT_SESSION_ADDED : seat-id='Seat7'
    session-id='Session6' session-type='' session-x11-display=''
    session-x11-display-device='' session-display-device='/dev/<wbr>pts/2'
    session-remote-host-name='<a href="http://fatty.de.regify.com" target="_blank">fatt<wbr>y.de.regify.com</a>'
    session-is-local=FALSE session-unix-user=1000
    session-creation-time='2018-<wbr>03-06T13:50:04.512161Z'<br>
    1520344204.519 type=SEAT_SESSION_REMOVED : seat-id='Seat7'
    session-id='Session6' session-type='' session-x11-display=''
    session-x11-display-device='' session-display-device='/dev/<wbr>pts/2'
    session-remote-host-name='<a href="http://fatty.de.regify.com" target="_blank">fatt<wbr>y.de.regify.com</a>'
    session-is-local=FALSE session-unix-user=1000
    session-creation-time='2018-<wbr>03-06T13:50:04.512161Z'<br>
    1520344204.520 type=SEAT_REMOVED : seat-id='Seat7' seat-kind=1<br>
    <br>
    *** /var/log/syslog ***<br>
    Mar  6 14:50:08 lindev /usr/bin/x2gostartagent: successfully started
    X2Go agent session with ID mario-56-1520344207_stDKDE_<wbr>dp24<br>
    Mar  6 14:50:13 lindev console-kit-daemon[2143]: GLib-CRITICAL:
    Source ID 57 was not found when attempting to remove it<br>
    <br>
    *** /var/log/auth.log ***<br>
    Mar  6 14:50:13 lindev sshd[5720]: Received disconnect from
    <a href="http://192.168.11.6" target="_blank">192.168.11.6</a>: 11: Bye Bye<br>
    Mar  6 14:50:13 lindev sshd[5665]: pam_unix(sshd:session): session
    closed for user mario<br>
    <br>
    *** /var/log/ConsoleKit/history ***<br>
    1520344213.470 type=SEAT_SESSION_REMOVED : seat-id='Seat6'
    session-id='Session5' session-type='' session-x11-display=''
    session-x11-display-device='' session-display-device='/dev/<wbr>ssh'
    session-remote-host-name='<a href="http://fatty.de.regify.com" target="_blank">fatt<wbr>y.de.regify.com</a>'
    session-is-local=FALSE session-unix-user=1000
    session-creation-time='2018-<wbr>03-06T13:50:04.336908Z'<br>
    1520344213.470 type=SEAT_REMOVED : seat-id='Seat6' seat-kind=1<br>
    <br>
    <br>
    Somehow i believe this is system related to my box rather than
    packaging, but i somehow can't put my finger on it.<br>
    Anybody see anything i overlooked?<span class="HOEnZb"><font color="#888888"><br>
    <br>
    <pre class="m_5080112862898418068moz-signature" cols="72">-- 
Mit freundlichen Grüßen/Kind regards

Mario Theodoridis</pre>
  </font></span></div>

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