** Also affects: linux (Ubuntu Utopic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Utopic)
Status: New => Triaged
** Changed in: linux (Ubuntu Utopic)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1406767
Title:
[Asus X750LN] High ACPI event count causing ~12% non-stop CPU
utilization
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Utopic:
Triaged
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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