kernel-packages team mailing list archive

[Nikola Nikolov <nikolov.tmw@xxxxxxxxx>]

Hi Christopher,

git bisect found the first good commit, here's the full output from the
last command:

bd9b2f9aff26c185c1f8e0cd08a850ee4ace391a is the first bad commit
commit bd9b2f9aff26c185c1f8e0cd08a850ee4ace391a
Author: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Date:   Mon Jul 14 22:41:41 2014 +0200

    ACPI / scan: No implicit wake notification for buttons
    
    The ACPI device enumeration code in Linux assumes that buttons always
    are wakeup devices, so it calls acpi_setup_gpe_for_wake() for them
    which leads to undesirable side effects.  Namely, that function sets
    up implicit device wake notification mechanism for a given GPE if
    there is no handler method in the ACPI namespace, which from the
    ACPICA's perspective means that there always is a way to handle
    that GPE if enabled.  However, we don't handle wake notify events
    for buttons, so if there are no handler methods for their GPEs in
    the namespace, enabling a button GPE at run time leads to a GPE
    storm in some cases (the GPE triggers, ACPICA carries out the
    implicit wake notification for it which isn't handled, so the
    GPE triggers again and so on).
    
    To prevent that from happening use acpi_mark_gpe_for_wake()
    instead of acpi_setup_gpe_for_wake() for buttons which will cause
    ACPICA to only enable button GPEs if there are handler methods for
    the in the namespace.
    
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

:040000 040000 fec6e6222f6b0f58a5106035c38c7091a48eef0c
f6c36ad741c62668891689c8229c3703146dc92e M      drivers

Let me know if there's anything else I need to do, 
Nikola

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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1406767

Title:
  High ACPI event count on Asus K750L, causing ~12% non-stop CPU
  utilization

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This started as soon as I installed Ubuntu when I bought my laptop,
  about 3 months ago. Due to other bugs with the kernel that Ubuntu
  uses, I switched to the latest mainline kernel available and that
  resolved the issue for me. At the time, this was
  3.16.3-031603.201409171435_amd64 . Ubuntu(14.10) itself is using
  3.16.0-28-generic at the moment.

  For only 16 minutes of uptime, cat /sys/firmware/acpi/interrupts/gpe_all yields this: 
  50867044

  Which is over 50 million interrupts. To illustrate the rate at which those events are fired, I ran this command: 
  cat /sys/firmware/acpi/interrupts/gpe_all && sleep 10 && cat /sys/firmware/acpi/interrupts/gpe_all  and the result was: 
  58397255
  58916975

  A little over half a million interrupts in 10 seconds.

  Again - this doesn't happen in the 3.17 kernel. At this point, I'm not
  sure whether this is a regression or if the fix hasn't gotten to
  Ubuntu yet.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-28-generic 3.16.0-28.38
  ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
  Uname: Linux 3.16.0-28-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  Date: Wed Dec 31 15:48:51 2014
  HibernationDevice: RESUME=UUID=7b341f94-cd2e-461a-8b9b-38d1161c43a6
  InstallationDate: Installed on 2014-09-21 (101 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: ASUSTeK COMPUTER INC. X750LN
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic root=UUID=7f1fe8aa-bbe8-435d-979a-261f0331631e ro quiet splash i8042.noloop=1 psmouse.proto=bare acpi_osi= vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-28-generic N/A
   linux-backports-modules-3.16.0-28-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  StagingDrivers: keucr
  UpgradeStatus: Upgraded to utopic on 2014-11-05 (55 days ago)
  dmi.bios.date: 02/19/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 201
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X750LN
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr201:bd02/19/2014:svnASUSTeKCOMPUTERINC.:pnX750LN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX750LN:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: X750LN
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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