https://bugs.kde.org/buglist.cgi?bug_severity=critical&bug_s...
This one caught my eye:
https://bugs.kde.org/show_bug.cgi?id=480122
SUMMARY If the screen is turn off and then the pc goes to sleep (only possible if the lid is closed because trying to use a shortcut to sleep cause pc screen to turn on), on lid open the screen is black and the pc is unusable (require a reboot).
https://bugs.kde.org/buglist.cgi?bug_severity=critical&bug_s...
This one caught my eye:
https://bugs.kde.org/show_bug.cgi?id=480122