Public bug reported:
On a bit higher load and especially if Laptop is charging, very often
Kernel does an emergency thermal shutdown.
thermal thermal_zone3: critical temperature reached (80 C), shutting
down
It says 80 C, but sensors command shows that temperatures hovering close
to 100C before the shutdown happens.
dmesg is often also full of these (for each core):
mce: CPU2: Core temperature above threshold, cpu clock throttled (total events
= 246766)
When I boot to Windows, it seems that CPU is throttled more aggressively
on load and thermal shutdown doesn't happen with a similar load, but CPU
frequencies drop to 1600 range, while in Ubuntu they are 2800 range.
I would rather have more throttling that computer shutting down randomly
without the ability to save work.
Is there a workaround?
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-21-generic 5.4.0-21.25
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu24
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: anton 1874 F.... pulseaudio
/dev/snd/pcmC0D0p: anton 1874 F...m pulseaudio
/dev/snd/pcmC0D6c: anton 1874 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 15 23:54:21 2020
InstallationDate: Installed on 2019-11-29 (137 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: LENOVO 81Q9
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic
root=UUID=24af2874-e109-44f9-a5b9-8a9ce34b3f0f ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-21-generic N/A
linux-backports-modules-5.4.0-21-generic N/A
linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-04-04 (11 days ago)
dmi.bios.date: 01/09/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: AUCN54WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0R32862 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Yoga C940-14IIL
dmi.modalias:
dmi:bvnLENOVO:bvrAUCN54WW:bd01/09/2020:svnLENOVO:pn81Q9:pvrLenovoYogaC940-14IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0R32862WIN:cvnLENOVO:ct31:cvrLenovoYogaC940-14IIL:
dmi.product.family: Yoga C940-14IIL
dmi.product.name: 81Q9
dmi.product.sku: LENOVO_MT_81Q9_BU_idea_FM_Yoga C940-14IIL
dmi.product.version: Lenovo Yoga C940-14IIL
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1873083
Title:
Lenovo Yoga C940 frequently does thermal shutdown
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