I have also encountered this issue. Running 64-bit linux was a requirement for me, and so all of my tests were performed against that. I found that I was able to boot reliably by setting the graphics to Intel in the BIOS. When graphics were set to Discrete in the BIOS, and Vt-d was turned on, the system would inevitably hang at boot. This could be worked around by setting either noacpi, or noapic - either option would allow the machine to boot reliably. I then discovered that disabling Vt-d in the BIOS would allow the machine to boot reliably with Discrete graphics selected in the BIOS, and without noacpi/noapic flags set. This is the configuration I have been using for the past month, and I'm happy to report that I have no longer had trouble booting. I would like to get Vx-d working again, however, as I use qemu/kvm a lot.
-- 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
