← Back to team overview

kernel-packages team mailing list archive

[Bug 1223851] Re: High CPU load after resuming on Samsung NP550P5C in BIOS mode

 

It sounds like this bug was introduced in v3.9.  In order to bisect, we
need to identify the last good and first bad kernel versions.

Can you test the following kernels and report back?  We are looking for
the earliest kernel version that exhibits this bug:

v3.9-rc4: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc4-saucy/

If v3.9-rc4 does not exhibit the bug then test v3.9-rc6:
v3.9-rc6: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc6-saucy/

If v3.9-rc4 does exhibit the bug then test v3.9-rc2:
v3.9-rc2: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc2-saucy

You don't have to test every kernel, just up until the kernel that first
has this bug.


Thanks in advance!

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1223851

Title:
  High CPU load after resuming on Samsung NP550P5C in BIOS mode

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Description of problem:

  After I resume the system and plug something in one of the machine's
  USB3 ports (it doesn't happen if I plug the same device on a USB2
  port), the CPU load raises to 50%, with one particular process with
  the highest load:

  4 root      20   0     0    0    0 R  50.1  0.0   1:43.63 kworker/0:0

  The problem seems to be caused by too many ACPI interrupts:

  root@ubuntu:~# grep -r . /sys/firmware/acpi/interrupts/
  /sys/firmware/acpi/interrupts/sci:12554973
  /sys/firmware/acpi/interrupts/error:       0
  /sys/firmware/acpi/interrupts/gpe00:       0   invalid
  /sys/firmware/acpi/interrupts/gpe01:       0   invalid
  /sys/firmware/acpi/interrupts/gpe02:       0   enabled
  /sys/firmware/acpi/interrupts/gpe03:       0   disabled
  /sys/firmware/acpi/interrupts/gpe04:       0   disabled
  /sys/firmware/acpi/interrupts/gpe05:       0   disabled
  /sys/firmware/acpi/interrupts/gpe06:       0   enabled
  /sys/firmware/acpi/interrupts/gpe07:       0   invalid
  /sys/firmware/acpi/interrupts/gpe08:       0   invalid
  /sys/firmware/acpi/interrupts/gpe09:       0   disabled
  /sys/firmware/acpi/interrupts/gpe10:       0   invalid
  /sys/firmware/acpi/interrupts/gpe11:       0   invalid
  /sys/firmware/acpi/interrupts/gpe12:       0   invalid
  /sys/firmware/acpi/interrupts/gpe13:       0   invalid
  /sys/firmware/acpi/interrupts/gpe14:       0   invalid
  /sys/firmware/acpi/interrupts/gpe15:       0   invalid
  /sys/firmware/acpi/interrupts/gpe16:       0   invalid
  /sys/firmware/acpi/interrupts/gpe0A:       0   invalid
  /sys/firmware/acpi/interrupts/gpe17:    1504   enabled
  /sys/firmware/acpi/interrupts/gpe0B:       0   disabled
  /sys/firmware/acpi/interrupts/gpe18:       0   invalid
  /sys/firmware/acpi/interrupts/gpe0C:       0   disabled
  /sys/firmware/acpi/interrupts/gpe19:       0   invalid
  /sys/firmware/acpi/interrupts/gpe0D:12553562   enabled
  /sys/firmware/acpi/interrupts/gpe0E:       0   disabled
  /sys/firmware/acpi/interrupts/gpe20:       0   disabled
  /sys/firmware/acpi/interrupts/gpe0F:       0   invalid
  /sys/firmware/acpi/interrupts/gpe21:       0   invalid
  /sys/firmware/acpi/interrupts/gpe22:       0   invalid
  /sys/firmware/acpi/interrupts/gpe23:       0   invalid
  /sys/firmware/acpi/interrupts/gpe24:       0   invalid
  /sys/firmware/acpi/interrupts/gpe25:       0   disabled
  /sys/firmware/acpi/interrupts/gpe26:       0   invalid
  /sys/firmware/acpi/interrupts/gpe1A:       0   invalid
  /sys/firmware/acpi/interrupts/gpe27:       0   invalid
  /sys/firmware/acpi/interrupts/gpe1B:       0   invalid
  /sys/firmware/acpi/interrupts/gpe28:       0   invalid
  /sys/firmware/acpi/interrupts/gpe1C:       0   invalid
  /sys/firmware/acpi/interrupts/gpe29:       0   invalid
  /sys/firmware/acpi/interrupts/gpe1D:       0   invalid
  /sys/firmware/acpi/interrupts/gpe1E:       0   enabled
  /sys/firmware/acpi/interrupts/gpe30:       0   invalid
  /sys/firmware/acpi/interrupts/gpe1F:       0   enabled
  /sys/firmware/acpi/interrupts/gpe31:       0   invalid
  /sys/firmware/acpi/interrupts/gpe32:       0   invalid
  /sys/firmware/acpi/interrupts/gpe33:       0   invalid
  /sys/firmware/acpi/interrupts/gpe34:       0   invalid
  /sys/firmware/acpi/interrupts/gpe35:       0   invalid
  /sys/firmware/acpi/interrupts/gpe36:       0   invalid
  /sys/firmware/acpi/interrupts/gpe2A:       0   invalid
  /sys/firmware/acpi/interrupts/gpe37:       0   invalid
  /sys/firmware/acpi/interrupts/gpe2B:       0   invalid
  /sys/firmware/acpi/interrupts/gpe38:       0   invalid
  /sys/firmware/acpi/interrupts/gpe2C:       0   invalid
  /sys/firmware/acpi/interrupts/gpe39:       0   invalid
  /sys/firmware/acpi/interrupts/gpe2D:       0   invalid
  /sys/firmware/acpi/interrupts/gpe2E:       0   invalid
  /sys/firmware/acpi/interrupts/gpe2F:       0   invalid
  /sys/firmware/acpi/interrupts/gpe3A:       0   invalid
  /sys/firmware/acpi/interrupts/gpe3B:       0   invalid
  /sys/firmware/acpi/interrupts/gpe3C:       0   invalid
  /sys/firmware/acpi/interrupts/gpe3D:       0   invalid
  /sys/firmware/acpi/interrupts/gpe3E:       0   invalid
  /sys/firmware/acpi/interrupts/gpe3F:       0   invalid
  /sys/firmware/acpi/interrupts/sci_not:       0
  /sys/firmware/acpi/interrupts/ff_pmtimer:       0   invalid
  /sys/firmware/acpi/interrupts/ff_rt_clk:       0   disabled
  /sys/firmware/acpi/interrupts/gpe_all:12556159
  /sys/firmware/acpi/interrupts/ff_gbl_lock:       0   disabled
  /sys/firmware/acpi/interrupts/ff_pwr_btn:       0   enabled
  /sys/firmware/acpi/interrupts/ff_slp_btn:       0   invalid

  I can mitigate the problem by disabling that particular source

  # echo disable > /sys/firmware/acpi/interrupts/gpe0D

  This also happens on Fedora 19 but doesn't happen on Ubuntu 13.04, so
  it seems the bug was introduced after the 3.8 kernel.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-5-generic 3.11.0-5.11
  ProcVersionSignature: Ubuntu 3.11.0-5.11-generic 3.11.0
  Uname: Linux 3.11.0-5-generic x86_64
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     4220 F.... pulseaudio
  CasperVersion: 1.336
  Date: Wed Sep 11 12:31:17 2013
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130910)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 550P5C/550P7C
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/hostname.seed boot=casper  quiet splash -- persistent BOOT_IMAGE=/casper/vmlinuz.efi
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-5-generic N/A
   linux-backports-modules-3.11.0-5-generic  N/A
   linux-firmware                            1.113
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/18/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P08AAA.045.130418.dg
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: SAMSUNG_NP1234567890
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: SEC_SW_REVISION_1234567890ABCD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP08AAA.045.130418.dg:bd04/18/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn550P5C/550P7C:pvrP08AAA:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrSEC_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
  dmi.product.name: 550P5C/550P7C
  dmi.product.version: P08AAA
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1223851/+subscriptions


References