After some digging I found that: - Fedora 40 suffers from the same issue - Mac Xquartz suffers with the same problem - it can be reproduced with any hardware and even on Virtual Box machine - bisecting the versions I dated it between 23.10 and 24.04
By doing the following test, I believe that the culprit is the ssh x11 tunneling I've enabled the X11 "tcp" (listen tcp) incoming connections on my client machine and when I connect to the remote server I've tried client $ ssh -XY remote-machine remote $ time xterm -e date real 0m5.145s user 0m0.034s sys 0m0.038s remote $ export DISPLAY=client:0.0 remote $ time xterm -e date real 0m0.136s user 0m0.032s sys 0m0.039s The effect is an important slowdown on any X11 commuication over ssh, making practically working impossible. It started to affect many people in our group -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2077612 Title: Slow X11 performance through ssh To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/2077612/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
