I can confirm the updated mate-screensaver fixes the issue (somehow). There is still maybe half-second blink of visible desktop when I disconnect an external monitor from HDMI port while the screen is locked. After that, the screen is properly locked. Still, the quick blink of desktop is a security issue and it might also be possible for a malicious hacker to insert a USB device which emulates keyboard and might kill the screensaver completely while the screen blinks.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1768352 Title: mate-screensaver screen lock can be bypassed by power cycling monitor To manage notifications about this bug go to: https://bugs.launchpad.net/mate-desktop/+bug/1768352/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
