Although it is not a helpful bug report, I found out that upgrading ubuntu version fixed the issue. I was using 18, and I upgraded to 20.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1889155 Title: after recent upgrade, hdmi secondary monitor is not detected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1889155/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs