Actually it seems to be a HW related issue as moving the laptop in another office "solves" the flickering issue.
Though, the latest xorg-edgers packages broke the external VGA output, but it's not related to this issue. ** Changed in: xorg (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/794474 Title: latitude e6420 screen flickering (sandy bridge intel video card) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/794474/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs