I found that if I disable the KDE's screensaver. Abovementioned problem does show up.
-- xserver-xorg-video-intel back-led wouldn't stay off https://bugs.launchpad.net/bugs/301337 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs