echo 'deb http://archive.ubuntu.com/ubuntu/ focal-proposed main restricted' >> /etc/apt/sources.list apt update apt install libx11-6
verify with 'apt-cache policy libx11-6' that you have the correct version (from proposed), and run your tests. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libx11 in Ubuntu. https://bugs.launchpad.net/bugs/1782984 Title: Assertion `!xcb_xlib_threads_sequence_lost' failed with multiple applications To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libx11/+bug/1782984/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp