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When I'm trying to connect to x11vnc server started on Ubuntu 16.10

x11vnc

The "Screen Sharing" app on on OS X 10.11.6 just hangs.

enter image description here

How can I fix this?

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  • When debugging this, if there is any problem with creating the connection, note that the Screen Sharing app (in macOS 10.13.4) will leave an open connection and not try again. You need to quit the app before trying again. – James May 26 '18 at 13:07
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If you want to connect to x11vnc server using "Screen Sharing" app on OS X, you need to tweak the x11vnc starting command:

x11vnc -display :0 -noxrecord -noxfixes -noxdamage -forever -passwd 123456
  • You can't use -ncache
  • You have to use -passwd

[source]

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  • 2
    Still working 08/2018 – Kevin Lemaire Aug 8 '18 at 12:20
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    Still working 07/2020. With the above command running on the linux box, open Screen Sharing.app from /System/Library/CoreServices/Application/ and enter <ip-to-linux-device>:5900 and it connects. – Saifur Rahman Mohsin Jul 8 '20 at 20:43
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    @SaifurRahmanMohsin from osx you can also run: open vnc://<serverip>:5900 – startoftext Jul 8 '20 at 23:22
  • works 08/2020 - macOS 10.14.6 (18G6020) – gnmerritt Aug 22 '20 at 17:32
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Building off prior answer, but too long for a comment. In MacOS Big Sur 11.1, I get better performance with this:

x11vnc -display :0 -noxrecord -forever -passwd 123456

By removing -noxdamage, I see both a decrease in drawing latency and far fewer tears when resizing or minimizing windows in x11. Removing -noxfixes make a much better experience as well, because the cursor displays properly - including when the x11 cursor changes shape (e.g. to resize a window). This is very handy, otherwise you will be constantly guessing if your cursor is properly over the reside selection box. No noticeable difference (to me) from removing noxrecord, so I left it in

While the -ncache option does successfully connect, I was unable to mix ncache and multiple desktop windows. This appears to be an unexpected artifact of how desktop windows are implemented (in Y-coords, windows are "under" the main one) that conflicts with how ncache works (by also using duplicate windows under the main one).

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