Cfrgtkky

I had this same problem, and I just found an easy solution. I originally just installed xrdp using the standard proceedure:

apt-get install xrdp

After that, its all about your xrdp.ini file, which is located here:

/etc/xrdp/xrdp.ini

To open and edit the xrdp's configuration file use:

sudo nano /etc/xrdp/xrdp.ini

by default the first xrdp session handling script looks like this:

[xrdp1]

name=sesman-vnc

lib=libvnc.so

username=ask

password=ask

ip=127.0.0.1

port=-1

The important line is port=-1, this makes xrdp always look for a free port to connect. If you set a fixed port here, the xrdp will always go back and connect to the same session. I changed mine so it looks like this:

[xrdp1]

name=customsessionname

lib=libvnc.so

username=myusername

password=ask

ip=127.0.0.1

port=5912

Thats it, I think you could get away with just changing the port=-1 to port=5912. My xrdp always re-connects to existing session always using the same port.

I'd like to improve on an existing answer. The top voted answer was to edit the xrdp.ini file to change port to a fixed value in place of the -1 wildcard to find an open port.

I tried that, but got an error connecting the first time, so ended up switching back to the -1 value. Frustration quickly set in though with the issue remaining of not resuming so I looked at the ini file again.

What worked for me, and was really just something I was curious about was this:

Edit the /etc/xrdp/xrdp.ini

Under [xrdp1] where port=-1 I noticed user name and password were set to ASK. If you set port=ask you will be given the option at the login prompt with username and password to choose a port.

Rather than install additional packages I found the easiest fix to be to set the ask option, connect the FIRST session (if I don't have one running already) on port -1 at the login with username and password.

After disconnecting the session, to resume an existing session always log in on the default port: 5910 and you will resume your existing session until you restart the remote computer or end the session when logging off.

To summarize:

• Edit the xrdp.ini file


• set port = ask
  


• connect from the remote machine, and at login if you have no existing session, specify port -1
  


• to resume a session enter the default of 5910
  

I hate to be the guy who just drops a link, but I followed the guide here and it worked really well. I can now log into an RDP session from Linux and Windows hosts and reconnects me to my old session if I've logged in before. This is the best guide to the install I've found. Unfortunately, the standard package install causes a lot more problems than doing it from source.

The author of that link has also made an automatic tool to install and configure it, but I haven't tried it, so be careful.

Hope that helps you out.

Problem is that xrdp does not always connect to the same port. In case it didn't and you forgot the port number, you could login a ssh session and find out the number by

netstat -tulpn | grep vnc

and you will get something like the following

tcp        0      0 127.0.0.1:5911          0.0.0.0:*               LISTEN      5365/Xvnc

and then you know 5911 was the port you connected to.

on the log in screen with the xrdp box when you first connect to the remote desktop there should be a drop down box, from here choose "vnc-any" then input the ip address of the computer and the password but leave the port at what it is, this should help :)

I ran into this problem on a Debian machine. Used X11RDP-o-Matic to build xrdp 0.7 packages. Prior to upgrading to systemd, xrdp session reconnect worked fine.

Looking at the process tree I could see that the sessions were no longer children of xrdp-sesman. Turned out to be a permissions issue when using systemd. Google found a patch that fixes the problem.

How do you identify a working reconnect? Run ps axf and look at the process tree for xrdp-sesman. X11rdp, xrdp-chansrv, xrdp-sessvc should all be running as a child. If they are not, xrdp-sesman will not know how to reconnect to the session.

Here's what it looks like when working:

If you encountered the problem of "password failed", you might take a look at the two issues in GitHub

Reconnect to old vnc session - VNC password failed

VNC Password failed when picking existing session

In short, they mention that specifying port number no longer works in latest design.

1. Modifiy you xrdp.ini:

sudo vi /etc/xrdp/xrdp.ini

2.Change the port setting port=ask-1 in your connection rule:

[xrdp1]

name=sesman-Xvnc

lib=libvnc.so

username=ask

password=ask

ip=127.0.0.1

port=ask-1

3.Restart your xrdp Service

sudo service xrdp restart

You should see the following picture when you login by remote desktop.
xrdp login window

1. At first login you can see this port number:

Port Number

If you forget this port number, you can using the following command to check:

netstat -peant | grep 59 | grep Xvnc

2. You can re-connect the last session by your port number.

Re-connect the last session

Ref:
http://c-nergy.be/blog/?p=5305

This UbuntuForum thread looks useful - I havent tested this myself - however I've copied the solution given here to complete this answer.

RealVNC setup

1. Uninstallation of the default Ubuntu VNC server (Vino):

Go to: System --> Administration --> Synaptic Package Manager
Search for the "Vino" package, Mark For Removal, Apply.

2. Installation of TightVNC and XRDP:

While you are using Synaptic Package Manager, seacrh for "tightvnc" package (be careful, not "xtightvnc") and Mark For Installation. Likewise, search for the "xrdp" package and Mark also For Installation. Apply.
PS: if you want, you may discard any other "vnc" package that you don't need!

3. Configuration of XRDP (Optional)

Open a terminal and type the three following commands:

 cd /etc/xrdp

 cp xrdp.ini xrdp.ini.bak 

 sudo gedit /etc/xrdp/xrdp.ini

Remove Xrdp2-Xrdp6 sections, leave only the Xrdp1 section. Your xrdp.ini should look like this:

[globals]

bitmap_cache=yes

bitmap_compression=yes

port=3389

crypt_level=low

channel_code=1



[xrdp1]

name=RDP_To_TightVNC

lib=libvnc.so

username=ask

password=ask

ip=127.0.0.1

port=-1

4. Connecting

Restart the system and you are ready to connect!

To connect from another Ubuntu machine, use: Applications --> Internet --> Terminal Server Client, type the IP of your Ubuntu VNC machine, use RDPv5 or RDP, click Connect!

To connect from a Windows-based machine, use: Start --> Run --> mstsc, type the IP of your Ubuntu VNC machine, click Connect.

When connected, use your Ubuntu user account credentials (u/n and p/w) and remotely login to your desktop.