Only one user cannot connect with ThinLinc client, but most others can

ThinLinc
1

Hello, I am a newbie to ThinLinc, great application though!

So all users can connect as expected to this new Redhat 8.5 server i set up the other day.
Using the latest ThinLinc version downloaded a couple days ago.

This one user rmorin, cannot connect, I deleted his .Xauthoruty file, I get same issue. The error in the xinit.log for this user is below, any help appreciated. Thanks

xauth: file /var/opt/thinlinc/sessions/rmorin/10/Xauthority does not exist
tl-xinit: Waiting for Xserver to accept connectionsā€¦

Xvnc ThinLinc release 4.14.0 build 2408 - built Jan 26 2022 10:15:02
Copyright (C) 1999-2022 TigerVNC Team and many others (see README.rst)
See https://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12013000

(II) Initializing extension VNC-EXTENSION

Thu Mar 31 10:48:03 2022
vncext: VNC extension running!
vncext: Listening for VNC connections on local interface(s), port 5910
vncext: created VNC server for screen 0
(II) Initializing extension Generic Event Extension
(II) Initializing extension SHAPE
(II) Initializing extension MIT-SHM
(II) Initializing extension XInputExtension
(II) Initializing extension XTEST
(II) Initializing extension BIG-REQUESTS
(II) Initializing extension SYNC
(II) Initializing extension XKEYBOARD
(II) Initializing extension XC-MISC
(II) Initializing extension XFIXES
(II) Initializing extension RENDER
(II) Initializing extension RANDR
(II) Initializing extension COMPOSITE
(II) Initializing extension DAMAGE
(II) Initializing extension MIT-SCREEN-SAVER
(II) Initializing extension DOUBLE-BUFFER
(II) Initializing extension RECORD
(II) Initializing extension DPMS
(II) Initializing extension Present
(II) Initializing extension DRI3
(II) Initializing extension X-Resource
(II) Initializing extension XVideo
(II) Initializing extension XVideo-MotionCompensation
(II) Initializing extension GLX
(II) IGLX: Loaded and initialized swrast
(II) GLX: Initialized DRISWRAST GL provider for screen 0
The XKEYBOARD keymap compiler (xkbcomp) reports:

Warning: Unsupported high keycode 372 for name ignored
X11 cannot support keycodes above 255.
This warning only shows for the first high keycode.
Errors from xkbcomp are not fatal to the X server
Connections: accepted: 127.0.0.1::35212
VNCSConnST: closing 127.0.0.1::35212: Clean disconnection
EncodeManager: Framebuffer updates: 0
EncodeManager: Total: 0 rects, 0 pixels
EncodeManager: 0 B (1:-nan ratio)
Connections: closed: 127.0.0.1::35212
ComparingUpdateTracker: 0 pixels in / 0 pixels out
ComparingUpdateTracker: (1:-nan ratio)
tl-xinit: Xserver ready for clients.
ā€” System information ā€”
ThinLinc 4.14.0
Linux apoc.hardent.com 4.18.0-348.20.1.el8_5.x86_64 #1 SMP Tue Mar 8 12:56:54 EST 2022 x86_64 x86_64 x86_64 GNU/Linux
Red Hat Enterprise Linux release 8.5 (Ootpa)
LSB Version: :core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
ā€” End system information ā€”
xsetroot: unable to open display ā€˜localhost:10.0ā€™
Cannot find xsri. Background image support not available.
xsetroot: unable to open display ā€˜localhost:10.0ā€™
Failed to open display
/opt/thinlinc/libexec/xprop: unable to open display ā€˜localhost:10.0ā€™
Openbox-Message: Failed to open the display from the DISPLAY environment variable.
Running /opt/thinlinc/etc/xstartup.d/01-tl-kinit.sh (Obtaining Kerberos ticket)
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
/opt/thinlinc/libexec/tl-run-xstartup-feedback: warning: Unable to initialize GTK+
/opt/thinlinc/libexec/tl-run-xstartup-feedback: warning: Wonā€™t present xstartup.d feedback
/opt/thinlinc/libexec/xprop failed: stderr:
/opt/thinlinc/libexec/xprop: unable to open display ā€˜localhost:10.0ā€™

Unable to fetch SSO attribute TL_SENSITIVE_PARAMS
/opt/thinlinc/libexec/xprop failed: stderr:
/opt/thinlinc/libexec/xprop: unable to open display ā€˜localhost:10.0ā€™

Unable to fetch SSO attribute TL_SENSITIVE_PARAMS
Running /opt/thinlinc/etc/xstartup.d/02-tl-dbus-launch.sh (Starting session D-Bus server)
Existing session D-Bus server found.
Setting initial D-Bus and systemd environmentā€¦
Running /opt/thinlinc/etc/xstartup.d/11-tl-set-title (Setting client window title)
Running /opt/thinlinc/etc/xstartup.d/12-tl-default-keyboard (Configuring default keyboard layout)
Setting default keyboard layout to ā€œusā€
Cannot open display ā€œlocalhost:10.0ā€
Running /opt/thinlinc/etc/xstartup.d/15-tl-shadow-notify (Enabling notifications when the session is shadowed)
Canā€™t open display: localhost:10.0
Running /opt/thinlinc/etc/xstartup.d/20-tl-select-profile.sh (Choosing a profile)
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
/opt/thinlinc/libexec/tl-select-profile: warning: Unable initialize GTK+
/opt/thinlinc/libexec/tl-select-profile: warning: Canā€™t show introduction text
/opt/thinlinc/libexec/tl-select-profile: warning: Using first available profile as fallback
Running /opt/thinlinc/etc/xstartup.d/30-tl-xdg-user-dirs (Translating standard folders)
Running /opt/thinlinc/etc/xstartup.d/40-tl-mount-localdrives (Mounting local drives)
Running /opt/thinlinc/etc/xstartup.d/41-tl-lp-redir-launch (Setting up printer port redirection)
Unable to open DISPLAY, exiting ā€¦
Running /opt/thinlinc/etc/xstartup.d/43-tl-pulseaudio-launch.sh (Starting session PulseAudio server)
Unable to open DISPLAY, exiting ā€¦

Thu Mar 31 10:48:06 2022
Connections: accepted: 127.0.0.1::35314
SConnection: Client needs protocol version 3.8
Failed to start session PulseAudio server
SConnection: Client requests security type VncAuth(2)
VNCSConnST: Replacing existing connection
VNCSConnST: Server default pixel format depth 24 (32bpp) little-endian rgb888
Running /opt/thinlinc/etc/xstartup.d/50-tl-wait-smartcard (Waiting for smart card connection)
Client has no smartcard capability
Stopping initial window managerā€¦
Openbox-Message: Failed to open the display from the DISPLAY environment variable.
Done.
Executing profile: gnome
Using XDG session: gnome
Updating D-Bus and systemd environmentā€¦
Ignoring invalid environment variable: ā€˜BASH_FUNC_which%%ā€™
Executing XDG session command: gnome-session
Profile command exited with exit code 143
Running /opt/thinlinc/etc/xlogout.d/tl-kdestroy.sh
kdestroy: No credentials cache found while destroying cache
Running /opt/thinlinc/etc/xlogout.d/tl-umount-localdrives
tl-xinit: client terminated and returned 0
tl-xinit: Terminating X serverā€¦
VNCSConnST: closing 127.0.0.1::35314: Server shutdown
EncodeManager: Framebuffer updates: 1
EncodeManager: Tight:
EncodeManager: Solid: 1 rects, 786.432 kpixels
EncodeManager: 16 B (1:196609 ratio)
EncodeManager: Total: 1 rects, 786.432 kpixels
EncodeManager: 16 B (1:196609 ratio)
ComparingUpdateTracker: 0 pixels in / 0 pixels out
ComparingUpdateTracker: (1:-nan ratio)
tl-xinit: X server has terminated
tl-xinit: deleting ā€¦/11.1648736915.ended
tl-xinit: Session terminated. Exiting.

2

Hello @robmorin

ā€œlocalhost:10.0ā€ indicates that DISPLAY is over tcp which ThinLinc normally doesnā€™t use, not sure whatā€™s going on here or how you ended up in this situation, perhaps youā€™ve modified the DISPLAY env variable of this user?

Regards,
Martin

3

Hey Martin, thanks for the reply. Indeed the user had in his bashrc profile display=127.0.0.1:10.0

So thinlinc does not use TCP? So no users should have thier display variable set? I am going to migrate from tiger NC to thinlinc on all Ubuntu and redhat servers, just want to make sure I should tell users not to set thier display variables. Thanks very much. Have a great day!

4

Hello,

Correct. Do not set these manually as it can lead to issues within ThinLinc.

Best regards,
Martin

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