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[Bug 1223851] Re: [Samsung NP550P5C-T01AR] High CPU load after resuming on in BIOS mode

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: "Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>
Date: Wed, 20 Nov 2013 12:05:35 -0000
Reply-to: Bug 1223851 <1223851@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Summary changed:

- High CPU load after resuming on Samsung NP550P5C in BIOS mode
+ [Samsung NP550P5C-T01AR] High CPU load after resuming on in BIOS mode

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https://bugs.launchpad.net/bugs/1223851

Title:
  [Samsung NP550P5C-T01AR] High CPU load after resuming on in BIOS mode

Status in The Linux Kernel:
  Unknown
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, 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

  WORKAROUND: It doesn't happen if I plug the same device on a USB2
  port.

  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.

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References

[Bug 1223851] [NEW] High CPU load after resuming on Samsung NP550P5C in BIOS mode
From: Agustin Barto, 2013-09-11