It looks like a classic BIOS bug, however there's not much chance Lenovo will resolve it as long as it has no effect on the stability of Windows.
In the meantime documentation and/or blacklistig x2APIC on Lenovo W520 would be great because out-of-the box it won't boot and lots of naive users will blame it on the distro.
Every kernel version until now has this particular problem.
https:/ /bugzilla. kernel. org/show_ bug.cgi? id=43054
It looks like a classic BIOS bug, however there's not much chance Lenovo will resolve it as long as it has no effect on the stability of Windows.
In the meantime documentation and/or blacklistig x2APIC on Lenovo W520 would be great because out-of-the box it won't boot and lots of naive users will blame it on the distro.