I case anyone runs into this later in time: I just got W520 and moved my Trusty installation from T520. Had various issues, mostly explained above. Upgraded to nvidia-352, upgraded to linux-image-generic-lts-wily (linux 4.2.0), problems persisted.
Then I just disabled VT-d in BIOS, and all the problems are gone. Didn't need to supply any special kernel boot parameters (my GRUB_CMDLINE_LINUX_DEFAULT line holds only 'verbose' in it). I am running BIOS v1.30. -- 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776999/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
