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[Bug 1514052] Re: erratic fan speed and little control kernel 4.2

 

Since "dell-smm-hwmon" seems to be an alias of the i8k module, and based
on the solution from the #100121 of the kernel bug tracker, blacklist
"dell-smm-hwmon" resolved the issue at least on my Dell Studio XPS 8000.
I tried many hard reboots to confirm this.

However i don't really know this module and can't say if blacklisting it
is free of side effects.

i'd argue that this module concerns DELL laptops as it's modinfo
description suggests but my DELL studio XpS 8000 is a desktop, not a
laptop.

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https://bugs.launchpad.net/bugs/1514052

Title:
  erratic fan speed and little control kernel 4.2

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have just upgraded to Ubuntu 15.10 and almost immediately my CPU fan
  started speeding and slowing without good reason even when the PC is
  idle.

  I tried various things but then found that if I leave the computer off
  for a long time and let everything cool down then when I boot from
  cold the CPU fan is stable.

  To test my theory of cold start out I then ran
  sudo cpupower frequency-set -g powersave
  followed by
  sudo cpupower frequency-set -g ondemand

  The final mode is the initial mode.  Almost immediately as soon as I
  moved to powersave mode the erratic fan speed started.  It did not
  stop when I returned to ondemand.

  Temp fix for this behaviour is - go and have a cup of coffee and let
  the computer cool down when you restart: shutdown then start from
  cold.

  $ uname -a
  Linux HomeMegaUbuntu 4.2.0-17-generic #21-Ubuntu SMP Fri Oct 23 19:56:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  $ lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 15.10
  Release:	15.10
  Codename:	wily

  $ cpupower frequency-info
  analyzing CPU 0:
    driver: acpi-cpufreq
    CPUs which run at the same hardware frequency: 0
    CPUs which need to have their frequency coordinated by software: 0
    maximum transition latency: 10.0 us.
    hardware limits: 1.20 GHz - 2.80 GHz
    available frequency steps: 2.80 GHz, 2.80 GHz, 2.67 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz
    available cpufreq governors: conservative, ondemand, userspace, powersave, performance
    current policy: frequency should be within 1.20 GHz and 2.80 GHz.
                    The governor "ondemand" may decide which speed to use
                    within this range.
    current CPU frequency is 1.20 GHz.
    cpufreq stats: 2.80 GHz:11.93%, 2.80 GHz:0.00%, 2.67 GHz:0.40%, 2.53 GHz:0.44%, 2.40 GHz:0.51%, 2.27 GHz:0.55%, 2.13 GHz:0.35%, 2.00 GHz:0.72%, 1.87 GHz:0.84%, 1.73 GHz:1.00%, 1.60 GHz:2.16%, 1.47 GHz:4.61%, 1.33 GHz:16.83%, 1.20 GHz:59.65%  (29241)
    boost state support:
      Supported: yes
      Active: yes
      25500 MHz max turbo 4 active cores
      25500 MHz max turbo 3 active cores
      25500 MHz max turbo 2 active cores
      25500 MHz max turbo 1 active cores

  Tried intel_pstate but it is not supported for some reason on my
  machine ie the following does not work and I am left with driver:
  acpi-cpufreq

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=enable"

  Could not see ACPI Thermal Zones reported in dmesg
  $ dmesg | grep ACPI
  [    0.000000] BIOS-e820: [mem 0x00000000bd780000-0x00000000bd78dfff] ACPI data
  [    0.000000] BIOS-e820: [mem 0x00000000bd78e000-0x00000000bd7cffff] ACPI NVS
  [    0.000000] ACPI: Early table checksum verification disabled
  [    0.000000] ACPI: RSDP 0x00000000000F9B40 000024 (v02 ACPIAM)
  [    0.000000] ACPI: XSDT 0x00000000BD780100 00006C (v01 DELL   FX09     20101113 MSFT 00000097)
  [    0.000000] ACPI: FACP 0x00000000BD780290 0000F4 (v04 DELL   FX09     20101113 MSFT 00000097)
  [    0.000000] ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe0Block: 128/64 (20150619/tbfadt-623)
  [    0.000000] ACPI: DSDT 0x00000000BD780660 005B02 (v02 1AAAA  1AAAA000 00000000 INTL 20051117)
  [    0.000000] ACPI: FACS 0x00000000BD78E000 000040
  [    0.000000] ACPI: FACS 0x00000000BD78E000 000040
  [    0.000000] ACPI: APIC 0x00000000BD780390 00008C (v02 DELL   FX09     20101113 MSFT 00000097)
  [    0.000000] ACPI: MCFG 0x00000000BD780420 00003C (v01 DELL   OEMMCFG  20101113 MSFT 00000097)
  [    0.000000] ACPI: SLIC 0x00000000BD780460 000176 (v01 DELL   FX09     20101113 MSFT 00000097)
  [    0.000000] ACPI: OSFR 0x00000000BD7805E0 000080 (v01 DELL   FX09     20101113 MSFT 00000097)
  [    0.000000] ACPI: OEMB 0x00000000BD78E040 000072 (v01 DELL   FX09     20101113 MSFT 00000097)
  [    0.000000] ACPI: HPET 0x00000000BD78A660 000038 (v01 DELL   OEMHPET  20101113 MSFT 00000097)
  [    0.000000] ACPI: ASF! 0x00000000BD78A6A0 000099 (v32 LEGEND I865PASF 00000001 INTL 20051117)
  [    0.000000] ACPI: SSDT 0x00000000BD78F800 000363 (v01 DpgPmm CpuPm    00000012 INTL 20051117)
  [    0.000000] ACPI: Local APIC address 0xfee00000
  [    0.000000] ACPI: PM-Timer IO Port: 0x808
  [    0.000000] ACPI: Local APIC address 0xfee00000
  [    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
  [    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
  [    0.000000] ACPI: IRQ0 used by override.
  [    0.000000] ACPI: IRQ9 used by override.
  [    0.000000] Using ACPI (MADT) for SMP configuration information
  [    0.000000] ACPI: HPET id: 0x8086a701 base: 0xfed00000
  [    0.000048] ACPI: Core revision 20150619
  [    0.004019] ACPI: All ACPI Tables successfully acquired
  [    0.206757] PM: Registering ACPI NVS region [mem 0xbd78e000-0xbd7cffff] (270336 bytes)
  [    0.217768] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
  [    0.217775] ACPI: bus type PCI registered
  [    0.217780] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
  [    0.222002] ACPI: Added _OSI(Module Device)
  [    0.222007] ACPI: Added _OSI(Processor Device)
  [    0.222011] ACPI: Added _OSI(3.0 _SCP Extensions)
  [    0.222016] ACPI: Added _OSI(Processor Aggregator Device)
  [    0.223412] ACPI: Executed 1 blocks of module-level executable AML code
  [    0.224917] ACPI: Dynamic OEM Table Load:
  [    0.224929] ACPI: SSDT 0xFFFF8802370FE000 001238 (v01 DpgPmm P001Ist  00000011 INTL 20051117)
  [    0.225251] ACPI: Dynamic OEM Table Load:
  [    0.225259] ACPI: SSDT 0xFFFF880235D62000 0004F4 (v01 PmRef  P001Cst  00003001 INTL 20051117)
  [    0.225623] ACPI: Interpreter enabled
  [    0.225631] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20150619/hwxface-580)
  [    0.225641] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20150619/hwxface-580)
  [    0.225659] ACPI: (supports S0 S3 S4 S5)
  [    0.225663] ACPI: Using IOAPIC for interrupt routing
  [    0.226463] PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] reserved in ACPI motherboard resources
  [    0.226492] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
  [    0.231375] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
  [    0.232079] pci 0000:00:03.0: System wakeup disabled by ACPI
  [    0.232944] pci 0000:00:1a.0: System wakeup disabled by ACPI
  [    0.233219] pci 0000:00:1c.0: System wakeup disabled by ACPI
  [    0.233355] pci 0000:00:1c.5: System wakeup disabled by ACPI
  [    0.233524] pci 0000:00:1d.0: System wakeup disabled by ACPI
  [    0.233628] pci 0000:00:1e.0: System wakeup disabled by ACPI
  [    0.250257] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 6 7 *10 11 12 14 15)
  [    0.250305] ACPI: PCI Interrupt Link [LNKB] (IRQs *5)
  [    0.250348] ACPI: PCI Interrupt Link [LNKC] (IRQs *3 4 6 7 10 11 12 14 15)
  [    0.250394] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 6 7 10 *11 12 14 15)
  [    0.250440] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 6 7 10 11 12 14 15) *0, disabled.
  [    0.250489] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 6 7 10 11 12 14 15) *0, disabled.
  [    0.250538] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 6 7 10 11 12 14 *15)
  [    0.250584] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 6 7 10 11 12 *14 15)
  [    0.250633] ACPI: Enabled 2 GPEs in block 00 to 3F
  [    0.251003] ACPI: bus type USB registered
  [    0.251169] PCI: Using ACPI for IRQ routing
  [    0.256895] ACPI: \: failed to evaluate _DSM (0x1001)
  [    0.265257] pnp: PnP ACPI init
  [    0.265351] system 00:00: Plug and Play ACPI device, IDs PNP0c01 (active)
  [    0.265407] pnp 00:01: Plug and Play ACPI device, IDs PNP0b00 (active)
  [    0.265587] system 00:02: Plug and Play ACPI device, IDs PNP0c02 (active)
  [    0.265738] system 00:03: Plug and Play ACPI device, IDs PNP0c02 (active)
  [    0.265823] system 00:04: Plug and Play ACPI device, IDs PNP0c02 (active)
  [    0.265919] system 00:05: Plug and Play ACPI device, IDs PNP0c02 (active)
  [    0.265982] system 00:06: Plug and Play ACPI device, IDs PNP0c02 (active)
  [    0.266159] system 00:07: Plug and Play ACPI device, IDs PNP0c01 (active)
  [    0.266252] pnp: PnP ACPI: found 8 devices
  [    1.168433] ACPI: Power Button [PWRB]
  [    1.170665] ACPI: Power Button [PWRF]
  [   21.995925] ACPI Warning: SystemIO range 0x0000000000000828-0x000000000000082F conflicts with OpRegion 0x0000000000000800-0x000000000000084F (\PMRG) (20150619/utaddress-254)
  [   21.995931] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
  --- 
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  pas        2076 F.... pulseaudio
   /dev/snd/controlC1:  pas        2076 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.10
  HibernationDevice: RESUME=UUID=68ce068c-1889-4f00-9b8a-12d7dc64348b
  InstallationDate: Installed on 2011-02-22 (1718 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Dell Inc. Inspiron 580
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-17-generic root=UUID=bf510382-4d2b-49d6-b9d9-ac6e3f6334eb ro intel_pstate=enable
  ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-17-generic N/A
   linux-backports-modules-4.2.0-17-generic  N/A
   linux-firmware                            1.149.1
  RfKill:
   
  Tags:  wily
  Uname: Linux 4.2.0-17-generic x86_64
  UpgradeStatus: Upgraded to wily on 2015-11-06 (0 days ago)
  UserGroups: adm admin cdrom dialout fuse lpadmin plugdev sambashare vboxusers wireshark
  _MarkForUpload: True
  dmi.bios.date: 11/13/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0C2KJT
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd11/13/2010:svnDellInc.:pnInspiron580:pvr:rvnDellInc.:rn0C2KJT:rvrA00:cvnDellInc.:ct3:cvr:
  dmi.product.name: Inspiron 580
  dmi.sys.vendor: Dell Inc.

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References