Wow. Everything Emil F. wrote applies to my case. I too have W520 with 1000M and when I change to discreet it freezes shortly after logging into gnome/unity with either nvidia or nouveau driver. However it works well with integrated card or with discreet before installing nvidia/nouveau driver.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/776999 Title: Lenovo W520 laptop freezes on ACPI-related actions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
