Public bug reported:

Hi,

I really don't know where to file this, but I have followed the
guidelines as per the instructions on:
https://wiki.ubuntu.com/DebuggingACPI

I have been able to boot Ubuntu 12.04 Beta fine for the past 2 months
without having to use the acpi=off flag, but last night I installed
around 104 updates (and I honestly don't know what), rebooted and had to
go back to using this flag.

I've had to do this before before the 3.0 Kernel or thereabouts, and
it's the first time that I've seen this for this motherboard since. I
have tried all the various other flags (like acpi=ht even though my CPU
is not hyperthreaded, and acpi=noirq and so on) and none of these have
made a difference, only acpi=off does anything.

The problem is that it's had a knock-on effect since this happening, if
I run any application under WINE, the audio is about twice the speed and
plays very distorted. I would have a few ideas on why both are related,
but I could be very wrong and obviously I could be reporting two
separate problems, but due to me having a fair understanding of the
APIC, I could see why this could be the same problem if WINE uses a
specific system for the audio subsystem which has been broken when I
turn off acpi and apic.

Best Regards
Steve

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: acpi (not installed)
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0-0ubuntu2
Architecture: amd64
Date: Sat Mar 31 14:03:34 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
SourcePackage: acpi
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: acpi (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/969955

Title:
  unable to boot without using acpi=off

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