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Message #148346
[Bug 1514052] Re: erratic fan speed and little control kernel 4.2
As expected f989e55452c74b4f7b22c889b8ec9f1192aaeec4 is a bad commit.
When kernel built with the preceeding commit
1a131ca1de7a84cf3827c418ee5971b493c6f23f then the fan is well behaved..
ie echo 200 > /sys/class/hwmon/hwmon3/pwm1
The fan speed builds up gradually and results in a reasonable constant fan speed fan1: 2207 RPM
echo 180 > /sys/class/hwmon/hwmon3/pwm1
The fan speed is reasonably constant at fan1: 1118 RPM
Note in both bad and good kernel the fan speed is not linear with the value sent to pwm1, rather a step change at about 192 from slow to fast.
In the good kernel the fan speed is rock solid constant.. I could not
seem to get the fan to get faster than 2207 RPM
In the bad kernel the fan speed is always varying as indicated above.
When configured with echo 200 > /sys/class/hwmon/hwmon3/pwm1 the fan
speed is always varying about a high value and with echo 180 >
/sys/class/hwmon/hwmon3/pwm1 the fan speed is always varying about a low
value. The range of fan speeds seems larger with the bad kernel (3000
-> 300) as you can see from the comment above.
Noticed that in the good kernel the virtual device seems to report the fans in the opposite order:
$ sensors
radeon-pci-0100
Adapter: PCI adapter
temp1: +57.5°C (crit = +120.0°C, hyst = +90.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +28.0°C (high = +83.0°C, crit = +99.0°C)
Core 1: +26.0°C (high = +83.0°C, crit = +99.0°C)
Core 2: +28.0°C (high = +83.0°C, crit = +99.0°C)
Core 3: +25.0°C (high = +83.0°C, crit = +99.0°C)
it8721-isa-0a10
Adapter: ISA adapter
in0: +0.86 V (min = +1.12 V, max = +2.09 V) ALARM
in1: +3.02 V (min = +2.87 V, max = +0.64 V) ALARM
in2: +2.00 V (min = +2.54 V, max = +1.44 V) ALARM
+3.3V: +3.29 V (min = +4.56 V, max = +4.37 V) ALARM
in4: +2.99 V (min = +2.68 V, max = +2.82 V) ALARM
in5: +2.22 V (min = +2.62 V, max = +2.29 V) ALARM
in6: +2.22 V (min = +2.29 V, max = +2.83 V) ALARM
3VSB: +3.34 V (min = +3.82 V, max = +4.54 V) ALARM
Vbat: +3.02 V
fan1: 965 RPM (min = 13 RPM)
fan2: 1112 RPM (min = 21 RPM)
temp1: -78.0°C (low = +55.0°C, high = -68.0°C) sensor = thermal diode
temp2: -8.0°C (low = -57.0°C, high = -93.0°C) sensor = thermistor
temp3: -71.0°C (low = -77.0°C, high = -49.0°C) sensor = Intel PECI
intrusion0: ALARM
i8k-virtual-0
Adapter: Virtual device
fan1: 1120 RPM
fan2: 972 RPM
Notice that in comment #16 the fan speeds are in the same order... apart
from the label change.
So with the good kernel it seems that the virtual device thinks fan1 is
the CPU fan and the ISA adapter thinks that fan2 is the CPU fan.
With the bad kernel it seems that the virtual device thinks that the CPU
fan is called Processor Fan and the ISA adapter thinks that the fan1 is
the CPU fan.
Seems to me like someone has switched some labels about! Perhaps by
"correcting the labels" something else has gone wrong! Perhaps ISA
adapter needs to think that fan2 is the CPU fan for some reason!
Anyway thats about all I can see is different from a quick review of the
sensor command output.
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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:
Incomplete
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
