$ tail -fn1024 /run/user/1000/xpra/\:100.log

X.Org X Server 1.19.2
Release Date: 2017-03-02
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.16.0-4-amd64 x86_64 Debian
Current Operating System: Linux servername 4.9.0-2-amd64 #1 SMP Debian 4.9.13-1 (2017-02-27) x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.9.0-2-amd64 root=/dev/mapper/mt2_sysgroup-root ro quiet
Build Date: 03 March 2017  03:14:41PM
xorg-server 2:1.19.2-1 (https://www.debian.org/support) 
Current version of pixman: 0.34.0
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(++) Log file: "/run/user/1000/xpra/Xorg.:100.log", Time: Tue Mar 28 18:02:46 2017
(++) Using config file: "/etc/xpra/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
2017-03-28 18:02:47,334 Warning: some of the sockets are in an unknown state:
2017-03-28 18:02:47,334  /var/run/user/1000/xpra/servername-100
2017-03-28 18:02:47,334  /home/username/.xpra/servername-100
2017-03-28 18:02:47,334  /var/run/xpra/servername-100
2017-03-28 18:02:47,335  please wait as we allow the socket probing to timeout
2017-03-28 18:02:55,359 created unix domain socket: /var/run/user/1000/xpra/servername-100
2017-03-28 18:02:55,360 created unix domain socket: /home/username/.xpra/servername-100
2017-03-28 18:02:55,361 created unix domain socket: /var/run/xpra/servername-100
2017-03-28 18:02:57,384 python netifaces package is missing
2017-03-28 18:03:00,071 Warning: webcam forwarding is disabled
2017-03-28 18:03:00,071  the virtual video directory '/sys/devices/virtual/video4linux' was not found
2017-03-28 18:03:00,071  make sure that the 'v4l2loopback' kernel module is installed and loaded
2017-03-28 18:03:00,071 found 0 virtual video devices for webcam forwarding
2017-03-28 18:03:01,146 GStreamer version 1.10.4 for Python 2.7.13 64-bit
2017-03-28 18:03:01,149 D-Bus notification forwarding is available
2017-03-28 18:03:01,176 xpra X11 version 2.1-r15340 64-bit
2017-03-28 18:03:01,176  uid=1000 (username), gid=100 (users)
2017-03-28 18:03:01,176  running with pid 20326 on Linux Debian 9.0 stretch
2017-03-28 18:03:01,176  connected to X11 display :100 with 24 bit colors
2017-03-28 18:03:01,410 3.9GB of system memory
2017-03-28 18:03:01,450 Warning: unknown avahi server state '1'
2017-03-28 18:03:01,450  to avoid this warning, disable mdns support 
2017-03-28 18:03:01,451  using the 'mdns=no' option
2017-03-28 18:03:01,451 xpra is ready.
2017-03-28 18:03:01,949 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:01,949 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:01,950 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:01,956 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:01,956 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:01,957 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,057 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,057 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,058 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,157 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,158 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,159 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,258 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,259 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,260 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,359 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,360 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,360 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,461 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,462 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,462 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,561 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,562 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,563 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,662 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,663 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,664 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,763 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,764 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,765 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,864 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,865 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:02,866 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,965 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:02,966 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:02,967 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,066 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,067 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,068 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,167 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,168 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,169 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,268 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,269 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,270 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,369 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,370 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,371 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,470 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,471 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,472 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,571 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,572 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,573 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,673 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,673 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,674 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,773 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,774 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,775 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,875 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,876 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,876 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:03,976 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:03,976 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:03,977 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:04,077 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:04,078 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:04,079 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:04,178 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:04,179 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:04,180 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:04,279 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:04,280 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:04,280 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:04,380 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:04,381 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:04,381 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:04,481 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:04,481 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:04,482 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:04,582 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:04,582 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:04,584 New unix-domain connection received on /var/run/xpra/servername-100
2017-03-28 18:03:04,683 New unix-domain connection received on /var/run/user/1000/xpra/servername-100
2017-03-28 18:03:04,684 New unix-domain connection received on /home/username/.xpra/servername-100
2017-03-28 18:03:04,685 New unix-domain connection received on /var/run/xpra/servername-100