xrdp is slow if compare with Windows Server or NoMachine

[thenik]

Hello,

Many thanks for your great solution. It works really good and I like it!
But I got performance issue with xrdp on vps servers/ ubuntu.

I purchased 2 vps servers and tried to installed xrdp + xfce and got the same performance issues ,
1st server is slow enought, but 4 cores + 8RAM
2nd has higher CPU + 16 RAM,
they have good network, ping is ok, more over I had the same problems with xrdp in the past even on local servers.
I always got windows redrawing performarce issues.

server - os linux \ ubuntu 22.04 LTS
How I installed, it is really simple

apt install xfce4 xfce4-goodies xorg dbus-x11 x11-xserver-utils
apt install xrdp

_I tried to play with xrdp.ini ,

• adjusted compression , set to NONE,
• changed max_bbp
  yes it halped but without dramatic changes._

Client - ubuntu 22.04 via xfreerdp from console
I connect to server via xrdp from ubuntu
xfreerdp /v:ip:port -compression -wallpaper /w:1366 /u:user /f /p:pwd /rfx /gfx +glyph-cache /timeout:20000 /jpeg

I tried all variants (from my opinion) how to connect to xrdp server but they give worst results.

Comparison with windows server
When I install windows server on the same vpsI see RDP works nice and performance is OK,
it is possible to develop on that machine.

Comparison with ubuntu/nomachine
When I install nomachine I see that performance is similar to windows RDP (maybea little slower)
but it good and it is possible to work this way.

Question
What I do wrong with xrdp setup?
My Idea that maybe some codecs / drivers were not installed at vps server and it works so slow.
Any idea how to adjust performance?

[matt335672]

@thenik - the best you can do at the moment is make sure RFX is enabled in the client. See #2136 for how to do this from Windows 10.

We're currently working on a solution based on GFX but it isn't there yet. See #1422 and neutrinolabs/librfxcodec#52 for more information.

[thenik]

@thenik I do not use windows because I use ubuntu 22.04 in the client.

Here is parapeters that I use for running RDP session form ubuntu (you can find that rfx is enabled ).
xfreerdp /v:ip:port -compression -wallpaper /w:1366 /u:user /f /p:pwd /rfx /gfx +glyph-cache /timeout:20000

[matt335672]

If you've got RFX enabled, that's the best you can do at the moment.

I'm assuming you're using the Xorg backend(?)

[thenik]

@matt335672 not sure =) here is of list of comands that I used for setup XRDP

apt install xfce4 xfce4-goodies xorg dbus-x11 x11-xserver-utils
apt install xrdp

[matt335672]

When you log in automatically, xrdp will pick the first section you have in your xrdp.ini file to select the X server.

The xrdp-sesman.log will tell you whether Xorg or Xvnc is being run for the session.

[thenik]

log

[20230116-05:06:58] [INFO ] Found X server running at /tmp/.X11-unix/X10
[20230116-05:06:58] [INFO ] Starting the xrdp channel server for display 10
[20230116-05:06:58] [INFO ] Found X server running at /tmp/.X11-unix/X10
[20230116-05:06:58] [INFO ] Session started successfully for user root on display 10
[20230116-05:06:58] [INFO ] Starting the default window manager on display 10: /etc/xrdp/startwm.sh
[20230116-05:06:58] [INFO ] Session in progress on display 10, waiting until the window manager (pid 24735) exits to end the session
[20230116-05:07:54] [INFO ] Socket 8: AF_INET6 connection received from ::ffff:127.0.0.1 port 58432
[20230116-05:07:54] [INFO ] ++ reconnected session: username root, display :10.0, session_pid 24734, ip ::ffff:212.58.119.202:3596 - socket: 12
[20230116-05:07:54] [INFO ] Starting session reconnection script on display 10: /etc/xrdp/reconnectwm.sh
[20230116-05:07:54] [ERROR] sesman_data_in: scp_process_msg failed
[20230116-05:07:54] [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans
[20230116-05:23:54] [INFO ] Socket 8: AF_INET6 connection received from ::ffff:127.0.0.1 port 58434
[20230116-05:23:54] [INFO ] ++ reconnected session: username root, display :10.0, session_pid 24734, ip ::ffff:212.58.119.202:3832 - socket: 12
[20230116-05:23:54] [INFO ] Starting session reconnection script on display 10: /etc/xrdp/reconnectwm.sh
[20230116-05:23:54] [ERROR] sesman_data_in: scp_process_msg failed
[20230116-05:23:54] [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans
[20230116-05:34:53] [INFO ] Socket 8: AF_INET6 connection received from ::ffff:127.0.0.1 port 58436
[20230116-05:34:54] [INFO ] ++ reconnected session: username root, display :10.0, session_pid 24734, ip ::ffff:212.58.119.202:3713 - socket: 12
[20230116-05:34:54] [ERROR] sesman_data_in: scp_process_msg failed
[20230116-05:34:54] [INFO ] Starting session reconnection script on display 10: /etc/xrdp/reconnectwm.sh
[20230116-05:34:54] [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans
[20230116-05:35:31] [INFO ] Socket 8: AF_INET6 connection received from ::ffff:127.0.0.1 port 58438
[20230116-05:35:31] [INFO ] ++ reconnected session: username root, display :10.0, session_pid 24734, ip ::ffff:212.58.119.202:3729 - socket: 12
[20230116-05:35:31] [ERROR] sesman_data_in: scp_process_msg failed
[20230116-05:35:31] [INFO ] Starting session reconnection script on display 10: /etc/xrdp/reconnectwm.sh
[20230116-05:35:31] [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans
[20230116-05:37:21] [INFO ] Socket 8: AF_INET6 connection received from ::ffff:127.0.0.1 port 58440
[20230116-05:37:21] [INFO ] ++ reconnected session: username root, display :10.0, session_pid 24734, ip ::ffff:212.58.119.202:3795 - socket: 12
[20230116-05:37:21] [ERROR] sesman_data_in: scp_process_msg failed
[20230116-05:37:21] [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans
[20230116-05:37:21] [INFO ] Starting session reconnection script on display 10: /etc/xrdp/reconnectwm.sh
[20230118-17:23:11] [INFO ] Socket 8: AF_INET6 connection received from ::ffff:127.0.0.1 port 58442
[20230118-17:23:11] [INFO ] ++ reconnected session: username root, display :10.0, session_pid 24734, ip ::ffff:212.58.119.202:3816 - socket: 12
[20230118-17:23:11] [ERROR] sesman_data_in: scp_process_msg failed
[20230118-17:23:11] [INFO ] Starting session reconnection script on display 10: /etc/xrdp/reconnectwm.sh
[20230118-17:23:11] [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans

[matt335672]

That's not got the info in it. When the session is created the log contains details of the X server. When you reconnect this isn't logged.

[thenik]

Any ideas where to find that ? I can share server ip login pwd =)

[matt335672]

Log out of xrdp (rather than disconnecting) and log in again :-)

[thenik]

yes, I found , looks like that it is XORG

20230119-11:04:28] [INFO ] Terminal Server Users group is disabled, allowing authentication
[20230119-11:04:28] [INFO ] ++ created session (access granted): username root, ip ::ffff:212.58.119.202:3750 - socket: 12
[20230119-11:04:28] [INFO ] starting Xorg session...
[20230119-11:04:28] [INFO ] Starting session: session_pid 539, display :10.0, width 1366, height 768, bpp 24, client ip ::ffff:212.58.119.202:3750 - socket: 12, user name root
[20230119-11:04:28] [INFO ] [session start] (display 10): calling auth_start_session from pid 539
[20230119-11:04:28] [ERROR] sesman_data_in: scp_process_msg failed
[20230119-11:04:28] [ERROR] sesman_main_loop: trans_check_wait_objs failed, removing trans
[20230119-11:04:29] [INFO ] Starting X server on display 10: /usr/lib/xorg/Xorg :10 -auth .Xauthority -config xrdp/xorg.conf -noreset -nolisten tcp -logfile .xorgxrdp.%s.log
[20230119-11:04:30] [INFO ] Found X server running at /tmp/.X11-unix/X10
[20230119-11:04:30] [INFO ] Found X server running at /tmp/.X11-unix/X10
[20230119-11:04:30] [INFO ] Starting the xrdp channel server for display 10
[20230119-11:04:30] [INFO ] Found X server running at /tmp/.X11-unix/X10
[20230119-11:04:30] [INFO ] Session started successfully for user root on display 10
[20230119-11:04:30] [INFO ] Session in progress on display 10, waiting until the window manager (pid 548) exits to end the session
[20230119-11:04:30] [INFO ] Starting the default window manager on display 10: /etc/xrdp/startwm.sh

[matt335672]

It is indeed.

If your client's running RFX, that's probably the best you'll get for now I'm afraid.

You can try the Xvnc backend. That is a bit less sensitive to latency in general, but don't expect amazing improvements.

[thenik]

Xvnc is a part of Xrdp ? How to try it?

[matt335672]

• Install tigervnc-standalone-server
• Get rid of the autologin
• Connect to the server using 24 or 32 bit colour
• On the login dialog, select Xvnc as the session type and fill in the rest of the login details.

You won't get RFX support, but the latency should be a bit less of an issue.

[akarl10]

@thenik Sometime ago I made some packages for ubuntu 22.04 and 22.10 that are based on the gfx branch mentioned by @matt335672 here.
If you are interested to see where development is going you may have a look on #2383 .