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[Bug 929111] Re: Repeated freezes when running on battery power


*** This bug is a duplicate of bug 1193639 ***

I don't know if this is still an issue. Due to my eeePC with infamous
cedarview-debacl i am forced to use ubuntu 12.04 with kernel 3.2.0-82.

I had the same issue. A possible fix might be setting the Atheros
Wireless card to allow Power Saving Option. How it is done, can be found


This is not 100% confirmed, but for now it seems to help

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  Repeated freezes when running on battery power

Status in linux package in Ubuntu:

Bug description:
  My Macbook Pro 3,1 started freezing on battery power just after I
  upgraded from linux-image-3.2.0-10-generic 3.2.0-10.18 to linux-
  image-3.2.0-12-generic 3.2.0-12.20. It was rock-solid on both AC power
  and battery power before upgrading to 3.2.0-12. It remains fine on AC

  I believe the battery in the system to be healthy - it is relatively
  new and holds a 3hr charge. The other hardware seems fine too, and
  given that the freezes started after a kernel upgrade I suspect a
  software (power management?) problem rather than a hardware problem.

  To reproduce:
  1) Unplug from AC power
  2) Wait 2-30mins

  Symptoms of the freeze include:
  * Mouse is frozen
  * Internal keyboard is unresponsive; can't switch to a VT either
  * USB devices plugged in after the freeze do not get powered on
  * Network connections dropped; the machine doesn't respond to ping after the freeze

  I haven't seen anything in syslog that I can attribute to the freezes.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-14-generic 3.2.0-14.23
  ProcVersionSignature: Ubuntu 3.2.0-14.23-generic 3.2.3
  Uname: Linux 3.2.0-14-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
   /dev/snd/controlC0:  steve      2032 F.... pulseaudio
   Card hw:0 'Intel'/'HDA Intel at 0xdb500000 irq 46'
     Mixer name	: 'Realtek ALC889A'
     Components	: 'HDA:10ec0885,106b2c00,00100103'
     Controls      : 34
     Simple ctrls  : 20
  Date: Wed Feb  8 15:51:43 2012
  HibernationDevice: RESUME=UUID=efdcd1bc-2e1a-4a77-8ff8-e46a71b2a78c
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
  MachineType: Apple Inc. MacBookPro3,1
   PATH=(custom, user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-14-generic root=UUID=4b3d81ed-fb5d-4946-97c0-ec537e1bfa3f ro quiet splash vt.handoff=7
   linux-restricted-modules-3.2.0-14-generic N/A
   linux-backports-modules-3.2.0-14-generic  N/A
   linux-firmware                            1.68
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-01-26 (12 days ago)
  dmi.bios.date: 03/05/08
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP31.88Z.0070.B07.0803051658
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Mac-F4238BC8
  dmi.board.vendor: Apple Inc.
  dmi.board.version: PVT
  dmi.chassis.asset.tag: Asset Tag#
  dmi.chassis.type: 2
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-F4238BC8
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP31.88Z.0070.B07.0803051658:bd03/05/08:svnAppleInc.:pnMacBookPro3,1:pvr1.0:rvnAppleInc.:rnMac-F4238BC8:rvrPVT:cvnAppleInc.:ct2:cvrMac-F4238BC8:
  dmi.product.name: MacBookPro3,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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