Can you still change the brightness after going with a 32b installation, or using the "noapic" parameter?
I reinstalled with precise 32bits and it doesn't freeze anymore, but the brightness control doesn't work either. The indicator shows up in the right top corner and the slider moves about, but the actual brightness doesn't change. I'll try rebooting with acpi_backlight=vendor later. -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs