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[Bug 1197871] Re: ACPI wakeup fails if HPET enabled in BIOS


I have this problem now that I have upgraded to Ubuntu 13.10 with kernel
version 3.11.0-13-generic.

If I add "hpet=disabled" to the GRUB_CMDLINE_LINUX_DEFAULT variable in
/etc/default/grub (and run sudo update-grub), then the computer wakes on
alarm.  Otherwise it does not.

I have had this problem on and off through various distributions of
Ubuntu.  I did not have this problem with Ubuntu 13.04.  I think I did
with Ubuntu 12.10 though.

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  ACPI wakeup fails if HPET enabled in BIOS

Status in “linux” package in Ubuntu:

Bug description:
  if I type this (as root)

  echo `date '+%s' -d '+ 5 minutes'` > /sys/class/rtc/rtc0/wakealarm


  rtcwake -d rtc0 -u -m no -t `date '+%s' -d '+ 5 minutes'`

  and then I shutdown the computer, it used to wake up after 5 minutes
  until I upgraded from linux-image-3.8.0-23-generic to a newer package.
  I've always had HPET enabled in BIOS.

  If I disable HPET in BIOS, my computer successfully wakes up in
  kernels > 3.8.0-23

  Maybe it's related to this patch found in the changelog
  zdiff /usr/share/doc/linux-image-3.8.0-23-generic/changelog.Debian.gz /usr/share/doc/linux-image-3.8.0-24-generic/changelog.Debian.gz | grep hpet
  >   * drivers/rtc/rtc-cmos.c: don't disable hpet emulation on suspend

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-26-generic 3.8.0-26.38
  ProcVersionSignature: Ubuntu 3.8.0-26.38-generic
  Uname: Linux 3.8.0-26-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu8.2
  Architecture: amd64
   /dev/snd/controlC0:  usuario    2971 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Thu Jul  4 17:32:03 2013
   eth0      no wireless extensions.
   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. GA-MA78GPM-DS2H
  MarkForUpload: True
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-26-generic root=UUID=22b58a09-ddc9-4068-8d9c-d225ad781780 ro quiet splash
   linux-restricted-modules-3.8.0-26-generic N/A
   linux-backports-modules-3.8.0-26-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2013-05-02 (63 days ago)
  dmi.bios.date: 12/25/2010
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F6h
  dmi.board.name: GA-MA78GPM-DS2H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF6h:bd12/25/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA78GPM-DS2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA78GPM-DS2H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: GA-MA78GPM-DS2H
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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