After starting vncserver in shell all commands fail to connect to X server due
to modified xauth.

bor@10:~> grep CPE_NAME /etc/os-release
CPE_NAME="cpe:/o:opensuse:tumbleweed:20180301"
bor@10:~> echo $DISPLAY
:1
bor@10:~> echo $XAUTHORITY 
/run/user/1000/gdm/Xauthority
bor@10:~> cp -p /run/user/1000/gdm/Xauthority .
bor@10:~> xdpyinfo | head -5
name of display:    :1
version number:    11.0
vendor string:    The X.Org Foundation
vendor release number:    11906000
X.Org version: 1.19.6
bor@10:~> vncserver

Warning: 10:1 is taken because of /tmp/.X11-unix/X1
Remove this file if there is no X server 10:1

New '10:2 (bor)' desktop is 10:2

Starting applications specified in /home/bor/.vnc/xstartup
Log file is /home/bor/.vnc/10:2.log

bor@10:~> xdpyinfo | head -5
No protocol specified
No protocol specified
xdpyinfo:  unable to open display ":1".
bor@10:~> cmp -b Xauthority /run/user/1000/gdm/Xauthority
Xauthority /run/user/1000/gdm/Xauthority differ: byte 8, line 1 is  12 ^J   1
^A
bor@10:~> XAUTHORITY=Xauthority xdpyinfo | head -5
name of display:    :1
version number:    11.0
vendor string:    The X.Org Foundation
vendor release number:    11906000
X.Org version: 1.19.6
bor@10:~> rpm -q xorg-x11-Xvnc
xorg-x11-Xvnc-1.8.0-8.1.x86_64
bor@10:~> ps -ef | grep Xvnc
bor       2442  1883  0 18:44 pts/0    00:00:00 /usr/bin/Xvnc :2 -auth
/run/user/1000/gdm/Xauthority -desktop 10:2 (bor) -fp
/usr/share/fonts/misc,/usr/share/fonts/75dpi,/usr/share/fonts/100dpi,/usr/share/fonts/Speedo,/usr/share/fonts/Type1
-geometry 1024x768 -pn -rfbauth /home/bor/.vnc/passwd -rfbport 5902 -rfbwait
30000
bor@10:~>