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Once upon a time, I installed xpra and have been using it without problem.

Then my harddrive crashed. I installed a new identical one, and restored a dd image of 6 months ago (before I had installed xpra).

I did apt-get install xpra and got one from the repositories, but it would not start a server. I'm pretty sure I never added special repositories and it used to work.

So I did a series of apt-get update apt-get upgrade apt-get dist-upgrade apt-get install xpra. Still not working. I purged xpra, added the winswitch repository as explained in the xpra.org download section, but it still doesn't work.

The thing I loved about xpra is that it just worked. But now I ended up doing a lot of googling, adding my user to all kinds of groups, up- and downgrading packages, and I still can't get it to work.

Can someone give me advice?

$ xpra start :2020
Entering daemon mode; any further errors will be reported to:
  /run/user/1000/xpra/:2020.log

$ cat /run/user/1000/xpra/:2020.log

X.Org X Server 1.19.0
Release Date: 2016-11-15
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.16.0-4-amd64 x86_64 Debian
Current Operating System: Linux Redsandro 4.8.0-2-amd64 #1 SMP Debian 4.8.11-1 (2016-12-02) x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.8.0-2-amd64 root=UUID=253cbc66-c252-4b50-a622-f30f324c6fff ro quiet
Build Date: 23 November 2016  07:20:23PM
xorg-server 2:1.19.0-2 (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.:2020.log", Time: Sat Dec 17 15:11:50 2016
(++) Using config file: "/etc/xpra/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
/usr/lib/xorg/Xorg: symbol lookup error: /usr/lib/xorg/modules/drivers/dummy_drv.so: undefined symbol: ChangeWindowProperty
display :2020 failed:
could not connect to X server on display ':2020' after 3 seconds
2016-12-17 15:11:53,416 killing xvfb with pid 17971
2016-12-17 15:11:53,418 failed to kill xvfb process with pid 17971:
2016-12-17 15:11:53,418  [Errno 3] No such process

It seems to try xserver-xorg-video-dummy and xvfb and both fail.

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The dummy driver version does not match your Xorg server version:

/usr/lib/xorg/modules/drivers/dummy_drv.so: undefined symbol: ChangeWindowProperty

Make sure that your dummy driver package matches the ABI version of the Xorg package.

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