I have a small problem on a Lenovo P15 laptop. I noticed the plastic of the case has kind of 'melted' on its back.
I was then surprised no typical fan sound was audible!
Curious, I installed sensors and checked for it:
$ sensors --version
sensors version 3.6.0 with libsensors version 3.6.0
$ sensors
iwlwifi_1-virtual-0
Adapter: Virtual device
temp1: +67.0°C
nouveau-pci-0100
Adapter: PCI adapter
temp1: N/A (high = +95.0°C, hyst = +3.0°C)
(crit = +105.0°C, hyst = +5.0°C)
(emerg = +135.0°C, hyst = +5.0°C)
BAT0-acpi-0
Adapter: ACPI interface
in0: 12.88 V
thinkpad-isa-0000
Adapter: ISA adapter
fan1: 0 RPM
CPU: +77.0°C
GPU: N/A
temp3: +76.0°C
temp4: +0.0°C
temp5: +77.0°C
temp6: +77.0°C
temp7: +78.0°C
temp8: N/A
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +76.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +77.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +79.0°C (high = +100.0°C, crit = +100.0°C)
Core 2: +82.0°C (high = +100.0°C, crit = +100.0°C)
Core 3: +81.0°C (high = +100.0°C, crit = +100.0°C)
nvme-pci-0400
Adapter: PCI adapter
Composite: +69.9°C (low = -273.1°C, high = +83.8°C)
(crit = +84.8°C)
Sensor 1: +69.9°C (low = -273.1°C, high = +65261.8°C)
Sensor 2: +69.9°C (low = -273.1°C, high = +65261.8°C)
acpitz-acpi-0
Adapter: ACPI interface
temp1: +72.0°C (crit = +128.0°C)
+72.0°C (crit = +128.0°C)
I also installed lm-sensors and run sensor-detect. This allows me to add the following to /etc/modules after the procedure:
~$ cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
# Generated by sensors-detect on Thu Mar 16 23:46:51 2023
# Chip drivers
coretemp
$ /etc/init.d/kmod start
$ apt-cache policy lm-sensors
lm-sensors:
Installed: 1:3.6.0-7ubuntu1
Candidate: 1:3.6.0-7ubuntu1
Version table:
*** 1:3.6.0-7ubuntu1 500
500 http://ch.archive.ubuntu.com/ubuntu jammy/universe amd64 Packages
100 /var/lib/dpkg/status
I rebooted but nothing changed. The fan stays idle even on high load.
What causes the fan to stop and how could I get it back to work?
Information
OS: Ubuntu 22.04.2 LTS x86_64
Host: 20W6004XMZ ThinkPad P15s Gen 2i
Kernel: 5.19.0-35-generic
CPU: 11th Gen Intel i7-1165G7 (8) @ 4.700GHz
GPU: NVIDIA Quadro T500 Mobile
GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics]
Memory: 4592MiB / 31824MiB
$ sudo systemctl status thermald.service
○ thermald.service - Thermal Daemon Service
Loaded: loaded (/lib/systemd/system/thermald.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Fri 2023-03-17 00:18:17 CET; 13h ago
Main PID: 1082 (code=exited, status=0/SUCCESS)
CPU: 6ms
mar 17 00:18:17 laptop-ThinkPad systemd[1]: Starting Thermal Daemon Service...
mar 17 00:18:17 laptop-ThinkPad thermald[1082]: 27 CPUID levels; family:model:stepping 0x6:8c:1 (6:140:1)
mar 17 00:18:17 laptop-ThinkPad thermald[1082]: [/sys/devices/platform/thinkpad_acpi/dytc_lapmode] present: Thermald can't run on this platform
mar 17 00:18:17 laptop-ThinkPad thermald[1082]: Unsupported cpu model or platform
mar 17 00:18:17 laptop-ThinkPad systemd[1]: thermald.service: Deactivated successfully.
mar 17 00:18:17 laptop-ThinkPad systemd[1]: Started Thermal Daemon Service._
Also, in the "Power" menu of the "Settings":
$ grep MHz /proc/cpuinfo
cpu MHz : 1137.014
cpu MHz : 922.759
cpu MHz : 1127.838
cpu MHz : 1255.019
cpu MHz : 1159.533
cpu MHz : 521.957
cpu MHz : 1246.749
cpu MHz : 1263.212
Normal usage.
$ grep MHz /proc/cpuinfo
cpu MHz : 3959.109
cpu MHz : 3959.044
cpu MHz : 3959.019
cpu MHz : 3959.131
cpu MHz : 3959.134
cpu MHz : 3959.043
cpu MHz : 3958.995
cpu MHz : 3959.111
After running stress --cpu 8.
Well, this is actually strange that it is blocked at 3'960 MHz whereas it can run up to 4700.0000 as reported by lscpu (?)
