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ACPI support on Linux - ThinkPad L420

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Started ‎07-10-2012 by
Modified ‎07-10-2012 by

ACPI support on Linux - ThinkPad L420

by Retired Moderator ‎07-10-2012 06:09 AM - edited ‎07-10-2012 11:37 PM (1,701 Views)




I recently bought a ThinkPad L420 and decided to run Ubuntu on it. Unfortunately, it only works (i.e. boots) when booting with disabled ACPI. Otherwise, the boot process would just not finish. Of course this means HyperThreading is disabled and other stuff is not working (no suspend, hibernation, need to press the power button after shutdown etc). How do I get it resolved?


Updating to  the newest BIOS (available as of now) should resolve the issue.If you are using a 64 bit version of Linux,it should recognize all of your RAM and all the CPU Cores as well.