How to reverse mouse + keyboard grab?

[Midnighter]

I tried to run an image with x11docker and a mostly grey window opens. Foolishly I tried out the ctrl + shift for mouse and keyboard grab. How can I undo that in order to close the window?

[mviereck]

Thanks for reporting!

Took me some time to find the non-obvious reason: Xephyr has a bug that prevents ungrabbing keyboard+mouse if a window title is set with option -title.

I have removed -title from Xephyr command, now ungrabbing works again.

You can undo the grab pressing ctrl+shift again. Run x11docker --update-master to get the latest beta with the bugfix.

[Midnighter]

Awesome, thank you for the quick response. It works perfectly for me.