I encountered the similar issue since 1.9.1-1ubuntu0.4 update. On the
previous version 1.9.1-1build1, if I run a CPU stress test, the fan will
keep going up until full speed (~6000rpm) as the temp rises. On
1.9.1-1ubuntu0.4, the fan sometimes is kept at 3600rpm or remains at
zero. Once CPU reaches over ~90C, it got throttled down to min freq
400MHz. I didn't know the problem was thermald until I reinstalled a
fresh Ubuntu 20.04.2, which worked perfectly, and then basically did a
binary search to find which package update caused the issue. To verify
it's really thermald 1.9.1-1ubuntu0.4, I reinstalled Ubuntu 20.04.2
again, and the fan worked fine as expected, and then updated thermald
alone, and this issue happened. Then I downgraded thermald to the stock
version come with Ubuntu 20.04.2, the issue went away.
lshw --short:
system Latitude 7400 (08E1)
/0 bus 07WDVW
/0/0 memory 64KiB BIOS
/0/20 memory 32GiB System Memory
/0/20/0 memory 16GiB SODIMM DDR4
Synchronous 2667 MHz (0.4 ns)
/0/20/1 memory 16GiB SODIMM DDR4
Synchronous 2667 MHz (0.4 ns)
/0/29 memory 256KiB L1 cache
/0/2a memory 1MiB L2 cache
/0/2b memory 8MiB L3 cache
/0/2c processor Intel(R) Core(TM) i7-8665U
CPU @ 1.90GHz
/0/100 bridge Coffee Lake HOST and DRAM
Controller
/0/100/2 display UHD Graphics 620 (Whiskey
Lake)
/0/100/4 generic Xeon E3-1200 v5/E3-1500
v5/6th Gen Core Processor Thermal Subsystem
/0/100/8 generic Xeon E3-1200 v5/v6 /
E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
/0/100/12 generic Cannon Point-LP Thermal
Controller
/0/100/14 bus Cannon Point-LP USB 3.1
xHCI Controller
/0/100/14/0 usb1 bus xHCI Host Controller
/0/100/14/0/6 multimedia Integrated_Webcam_HD
/0/100/14/0/8 generic 58200
/0/100/14/0/a communication Bluetooth wireless interface
/0/100/14/1 usb2 bus xHCI Host Controller
/0/100/14.2 memory RAM memory
/0/100/14.3 wlo1 network Cannon Point-LP CNVi
[Wireless-AC]
/0/100/15 bus Cannon Point-LP Serial IO
I2C Controller #0
/0/100/15.1 bus Cannon Point-LP Serial IO
I2C Controller #1
/0/100/15.3 bus Intel Corporation
/0/100/16 communication Cannon Point-LP MEI
Controller #1
/0/100/16.3 communication Cannon Point-LP Keyboard
and Text (KT) Redirection
/0/100/19 bus Cannon Point-LP Serial IO
I2C Host Controller
/0/100/1c bridge Cannon Point-LP PCI Express
Root Port #5
/0/100/1c/0 bridge JHL6340 Thunderbolt 3
Bridge (C step) [Alpine Ridge 2C 2016]
/0/100/1c/0/0 bridge JHL6340 Thunderbolt 3
Bridge (C step) [Alpine Ridge 2C 2016]
/0/100/1c/0/0/0 generic JHL6340 Thunderbolt 3 NHI
(C step) [Alpine Ridge 2C 2016]
/0/100/1c/0/1 bridge JHL6340 Thunderbolt 3
Bridge (C step) [Alpine Ridge 2C 2016]
/0/100/1c/0/2 bridge JHL6340 Thunderbolt 3
Bridge (C step) [Alpine Ridge 2C 2016]
/0/100/1c/0/2/0 bus JHL6340 Thunderbolt 3 USB
3.1 Controller (C step) [Alpine Ridge 2C 2016]
/0/100/1c/0/2/0/0 usb3 bus xHCI Host Controller
/0/100/1c/0/2/0/1 usb4 bus xHCI Host Controller
/0/100/1d bridge Intel Corporation
/0/100/1d/0 generic RTS525A PCI Express Card
Reader
/0/100/1d.4 bridge Cannon Point-LP PCI Express
Root Port #13
/0/100/1d.4/0 storage SK hynix
/0/100/1d.4/0/0 /dev/nvme0 storage PC601 NVMe SK hynix 512GB
/0/100/1d.4/0/0/1 /dev/nvme0n1 disk 512GB NVMe namespace
/0/100/1d.4/0/0/1/1 volume 511MiB Windows FAT volume
/0/100/1d.4/0/0/1/2 /dev/nvme0n1p2 volume 732MiB EXT4 volume
/0/100/1d.4/0/0/1/3 /dev/nvme0n1p3 volume 475GiB EFI partition
/0/100/1f bridge Cannon Point-LP LPC
Controller
/0/100/1f.3 multimedia Cannon Point-LP High
Definition Audio Controller
/0/100/1f.4 bus Cannon Point-LP SMBus
Controller
/0/100/1f.5 bus Cannon Point-LP SPI
Controller
/0/1 system PnP device PNP0c02
/0/2 system PnP device PNP0c02
/0/3 system PnP device PNP0b00
/0/4 generic PnP device INT3f0d
/0/5 input PnP device PNP0303
/0/6 generic PnP device DLL08e1
/0/7 system PnP device PNP0c02
/0/8 system PnP device PNP0c02
/0/9 system PnP device PNP0c02
/0/a system PnP device PNP0c02
/1 power DELL K4Y2J9B
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https://bugs.launchpad.net/bugs/1930422
Title:
thermald_1.9.1-1ubuntu0.4_amd64 breaks system
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