Xrdp: xubuntu 16.10 default xrdp black screen

Created on 29 Dec 2016  ·  24Comments  ·  Source: neutrinolabs/xrdp

xubuntu 16.10 fresh install:
~$ sudo apt install xrdp

connect via Xorg - blackscreen

picture coolemza
👍3

Most helpful comment

Debian based distro needs to edit /etc/X11/Xwrapper.config. See https://github.com/neutrinolabs/xrdp/issues/764#issuecomment-304576785. Reporter says now it works good, closing.

picture metalefty on 12 Jun 2017
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All 24 comments

What version of xrdp is it? If it's anything older than 0.9.1, please try 0.9.1. The same question about xorgxrdp? If it's not 0.2.0, please try 0.2.0.

What do you see in /var/log/xrdp-sesman.log?

proski picture proski on 29 Dec 2016

By the way, all issues with the distro packages should be reported to the distro bug tracker.

proski picture proski on 29 Dec 2016

/var/log/xrdp-sesman.log:
[20161230-01:59:03] [INFO ] A connection received from ::1 port 55784
[20161230-01:59:04] [INFO ] ++ created session (access granted): username lc, ip 0.0.0.0:51574 - socket: 12
[20161230-01:59:04] [INFO ] starting Xorg session...
[20161230-01:59:04] [DEBUG] Closed socket 9 (AF_INET6 :: port 5910)
[20161230-01:59:04] [DEBUG] Closed socket 9 (AF_INET6 :: port 6010)
[20161230-01:59:04] [DEBUG] Closed socket 9 (AF_INET6 :: port 6210)
[20161230-01:59:04] [DEBUG] Closed socket 7 (AF_INET6 ::1 port 3350)
[20161230-01:59:04] [DEBUG] Closed socket 8 (AF_INET6 ::1 port 3350)
[20161230-01:59:04] [INFO ] Xorg :10 -auth .Xauthority -config xrdp/xorg.conf -noreset -nolisten tcp
[20161230-01:59:04] [INFO ] starting xrdp-sessvc - xpid=3414 - wmpid=3413
[20161230-01:59:04] [INFO ] ++ terminated session: username lc, display :10.0, session_pid 3412, ip 0.0.0.0:51574 - socket: 12

in xubuntu 16.10 - xrdp version 0.9

i tried xubuntu 17.04 it has xrdp 0.9.1 in repo and and i think xorgxrdp 0.2.0, at least /usr/share/doc/xorgxrdp/changelog.Debian.gz contains:
xrdp (0.9.1-1) unstable; urgency=medium

[ Dominik George ]

  • New upstream release.

    • Now has an upstream changelog.

    • Enables xauth cookies to prevent unauthorised X server access.

    • Enables libpainter for clients not supporting drawing orders.



      • Fixes MS RDP client on Android and others.



  • Replaced debian/rules get-orig-source with uscan.
  • Re-enabled watch file.
  • Turned into MUT package.

    • Incorporates xorgxrdp 0.2.0.

  • Update list of keymap conffiles to be removed on upgrade.
    (Closes: #845701, #847844)
  • Move back to compat level 9 to allow easier backporting.

  • Update VCS fields due to pkg-remote repo space restructuring.

    [ Thorsten Glaser ]

  • xrdp Recommends fuse, so that remote drive sharing actually works.

    -- Dominik George nik@naturalnet.de Fri, 23 Dec 2016 11:59:32 +0100

and , the same problem, the same log

will try to build xrdp and xorgxrdp from devel branch

coolemza picture coolemza on 30 Dec 2016

Which desktop manager do you use? Is it installed? You can try to use mate.
בתאריך יום ו׳, 30 בדצמ׳ 2016 ב-1:19 מאת coolemza notifications@github.com:

/var/log/xrdp-sesman.log:
[20161230-01:59:03] [INFO ] A connection received from ::1 port 55784
[20161230-01:59:04] [INFO ] ++ created session (access granted): username
lc, ip 0.0.0.0:51574 - socket: 12
[20161230-01:59:04] [INFO ] starting Xorg session...
[20161230-01:59:04] [DEBUG] Closed socket 9 (AF_INET6 :: port 5910)
[20161230-01:59:04] [DEBUG] Closed socket 9 (AF_INET6 :: port 6010)
[20161230-01:59:04] [DEBUG] Closed socket 9 (AF_INET6 :: port 6210)
[20161230-01:59:04] [DEBUG] Closed socket 7 (AF_INET6 ::1 port 3350)
[20161230-01:59:04] [DEBUG] Closed socket 8 (AF_INET6 ::1 port 3350)
[20161230-01:59:04] [INFO ] Xorg :10 -auth .Xauthority -config
xrdp/xorg.conf -noreset -nolisten tcp
[20161230-01:59:04] [INFO ] starting xrdp-sessvc - xpid=3414 - wmpid=3413
[20161230-01:59:04] [INFO ] ++ terminated session: username lc, display
:10.0, session_pid 3412, ip 0.0.0.0:51574 - socket: 12

in xubuntu 16.10 - xrdp version 0.9

i tried xubuntu 17.04 it has xrdp 0.9.1 in repo and and i think xorgxrdp
0.2.0, at least /usr/share/doc/xorgxrdp/changelog.Debian.gz contains:
xrdp (0.9.1-1) unstable; urgency=medium

[ Dominik George ]

  • New upstream release.

    • Now has an upstream changelog.

    • Enables xauth cookies to prevent unauthorised X server access.

    • Enables libpainter for clients not supporting drawing orders.



      • Fixes MS RDP client on Android and others.



    • Replaced debian/rules get-orig-source with uscan.

  • Re-enabled watch file.
  • Turned into MUT package.

    • Incorporates xorgxrdp 0.2.0.

  • Update list of keymap conffiles to be removed on upgrade.
    (Closes: #845701, #847844)
  • Move back to compat level 9 to allow easier backporting.
  • Update VCS fields due to pkg-remote repo space restructuring.

[ Thorsten Glaser ]

  • xrdp Recommends fuse, so that remote drive sharing actually works.

-- Dominik George [email protected] Fri, 23 Dec 2016 11:59:32 +0100

and , the same problem, the same log

will try to build xrdp and xorgxrdp from devel branch

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Idan Freiberg

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speidy picture speidy on 30 Dec 2016

xubuntu has XFCE as default desktop manager and yes it is installed

coolemza picture coolemza on 30 Dec 2016

You should check if /etc/xrdp/startwm.sh is actually running a desktop
manager for you. This script is being executed by xrdp-sesman after a user
has logged using xrdp.
בתאריך יום ו׳, 30 בדצמ׳ 2016 ב-1:41 מאת coolemza notifications@github.com:

xubuntu has XFCE as default desktop manager and yes it is installed

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Idan Freiberg

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speidy picture speidy on 30 Dec 2016

commented last 2 rows and added direct session call in /etc/xrdp/startwm.sh:

test -x /etc/X11/Xsession && exec /etc/X11/Xsession

exec /bin/sh /etc/X11/Xsession

xfce4-session

still have the same problem

coolemza picture coolemza on 30 Dec 2016

I can reproduce the bug with a fresh install from ubuntu 16.10, with xfce minimal, and the 0.9.1 release +0.2.0 for xorgxrdp.
xrdp/xrdp-sesman running at service fails to start the session, but running both daemon at foreground makes the session start correctly

This is a systemd error, according to Xorg's log compared between running and failed session

--- notstarting-xorgxrdp.log    2016-12-30 15:46:56.531010000 +0100
+++ starting-xorgxrdp.log   2016-12-30 15:47:07.835010000 +0100

-(EE) systemd-logind: failed to get session: PID 1849 does not belong to any known session
+(II) systemd-logind: took control of session /org/freedesktop/login1/session/c2

 (II) xfree86: Adding drm device (/dev/dri/card0)
-(EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
+(II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 9 paused 1
+(EE) Error systemd-logind returned paused fd for drm node
+(II) systemd-logind: releasing fd for 226:0

 (II) xfree86: Adding drm device (/dev/dri/card0)
-(EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
+(II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 11 paused 1
+(EE) Error systemd-logind returned paused fd for drm node
+(II) systemd-logind: releasing fd for 226:0


 rdpkeybChangeKeyboardControl: autoRepeat off
 rdpRRGetInfo:
 rdpRRGetInfo:
-rdpmouseControl: what 2
-rdpmouseDeviceOff:
-rdpkeybControl: what 2
-rdpkeybDeviceOff:
-rdpkeybControl: what 3
-rdpkeybUnInit: drv 0x5579a498bb90 info 0x5579a4c16380, flags 0x0
-rdpUnregisterInputCallback: proc 0x7feb01e235f0
-rdpmouseControl: what 3
-rdpmouseUnInit: drv 0x5579a498b450 info 0x5579a4a8c8c0, flags 0x0
-rdpUnregisterInputCallback: proc 0x7feb02026cd0
-rdpCloseScreen:
-xorgxrdpDownDown:
-xorgxrdpDownDown: 1
-rdpClientConDeinit:
-rdpClientConDeinit: deleting file /tmp/.xrdp/xrdp_display_10
-(II) Server terminated successfully (0). Closing log file.
moobyfr picture moobyfr on 30 Dec 2016

I got more deeply on this problem. The change in Xorg is resumed here: https://bugzilla.redhat.com/show_bug.cgi?id=1176442#c1

A workaround is to set Xorg suid

A long term solution is to register a session in logind

moobyfr picture moobyfr on 30 Dec 2016

confirm, setting suid to Xorg resolves problem

@moobyfr, thank you for investigation and workaround

coolemza picture coolemza on 31 Dec 2016

Considering the error messages, my guess is that it would be better to prevent Xorg from trying to access /dev/dri/card0. Ideally, it should be done in the xorg.conf file that comes from xorgxrdp. Of maybe one of the xorgxrdp modules could suppress DRI programmatically.

proski picture proski on 1 Jan 2017

I would prefer fixing logind issue directly, as xrdp start a new session, we should register the session in systemd: systemd makes assumptions about a seat being used, more things could break (real example: if you log out from your xrdp session, you'll close the actual session too if you launched xrdp manually)

There are lots of updates pushed by systemd developers which will require adapting daemons services sooner or later (like https://github.com/tmux/tmux/issues/428)

moobyfr picture moobyfr on 2 Jan 2017

Changing the sticky bit didn't work for me. Assuming I sudo chmod u+s on the right files.
lsb_release 16.10
xrdp -v 0.9.0
/usr/bin/Xorg -rws
/usr/lib/xorg/Xorg -rws

On a new apt-get install of xrdp I can remote in successfully.
After a shutdown -r will I get a black screen. .
Afert having rebooted and the black screen appears, I can shell in an apt-get remove xrdp followed by apt-get install xrdp. Then remote works fine.

Rinse and Repeat, If I reboot, I get black screen until I remove/install again.
I am running xubuntu, its also a vmware guest.

sudo-oops picture sudo-oops on 22 Mar 2017

A workaround is to set Xorg suid

A long term solution is to register a session in logind

Can this be translated for n00bs like me? suid = superuser ID? How to set?

arencambre picture arencambre on 3 May 2017
👍1

Can this be translated for n00bs like me? suid = superuser ID? How to set?

What I found is that setting suid on the /usr/bin/Xorg script is insufficient. You'll need to open up said script, find the path of executable that it runs, and suid on _that_. (chmod u+s)

mzolus picture mzolus on 4 May 2017

It seems that the same issue occurs now on debian stretch with all recent updates installed. A solution for this problem in stretch is to uninstall the package "xserver-xorg-legacy".

tfischer77 picture tfischer77 on 8 May 2017

What I found is that setting suid on the /usr/bin/Xorg script is insufficient. You'll need to open up said script, find the path of executable that it runs, and suid on that. (chmod u+s)

I went to /usr/bin/Xorg and found that it references /usr/lib/xorg/Xorg. That file's permissions:
-rwxr-xr-x 1 root root 2432376 Mar 27 11:43 Xorg

I did chmod u+s and rebooted for good measure. Made no difference.

It seems that the same issue occurs now on debian stretch with all recent updates installed. A solution for this problem in stretch is to uninstall the package "xserver-xorg-legacy".

There is no xserver-xorg-legacy package installed for me.

I am on Ubuntu 17.04.

arencambre picture arencambre on 22 May 2017

everythink works good since v0.9.2, build it from sources if ur distro have lower version of xrdp

coolemza picture coolemza on 31 May 2017

Debian based distro needs to edit /etc/X11/Xwrapper.config. See https://github.com/neutrinolabs/xrdp/issues/764#issuecomment-304576785. Reporter says now it works good, closing.

metalefty picture metalefty on 12 Jun 2017
🎉2 👍1

Thanks, https://github.com/neutrinolabs/xrdp/issues/598#issuecomment-307726778 did the trick on Ubuntu 17.10!

sudo sed -i 's/allowed_users=console/allowed_users=anybody/' /etc/X11/Xwrapper.config

Source: https://unix.stackexchange.com/a/153875

Manouchehri picture Manouchehri on 4 Aug 2017

Ubuntu 17.04

sed: can't read /etc/X11/Xwrapper.config: No such file or directory

What am I doing wrong? Where is my Xwrapper?
Creating this file manually and adding this line gives nothing.

Suncatcher picture Suncatcher on 8 Oct 2017

Still struggling with black screen of xfce. Any suggestions?

Suncatcher picture Suncatcher on 13 Oct 2017

Please don't hijack closed issue. Reporter says now it works good, this issue is finished. Raise your own issue.

Plus, blank screen is the issue "before" WM. WM starts after Xorg starts. Your issue seems Xorg is not starting. Changing WM has no effect. I should say you again, please don't think WM issue. You have some things to try before trying multiple WM.

metalefty picture metalefty on 14 Oct 2017

It works for me: https://vinnyfs89.gitbook.io/knowledge/technology/operational-systems/linux/how-to#remote-access-using-the-xrdp-package

Look at these lines below:

# Allow firewall access on port 3389
ufw allow 3389

# Change "allowed_users" to anybody
# like this: allowed_users=anybody
vim /etc/X11/Xwrapper.config
vinnyfs89 picture vinnyfs89 on 15 Dec 2020
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