Hi! I have C940-14IIL, running under Fedora 32 and I am very pleased by this laptop. Everything is OK, except shutdown/reboot (workaround i915.enable_psr=0 kernel option), fingerprint reader (do not care) and overheating shutdown.
I have resolved my overheating problem by installing the last version 2.2 of thermald from Github and automatically creating config bydptfxtract (https://github.com/intel/dptfxtract). The bydptfxtract create 10 different thermal-conf.xml. I have tested all of them and I am attaching the most successful of them. I did a stress test with full load for 10 minutes. Following is the uptime output: 14:47:46 up 18:57, 1 user, load average: 8.49, 9.10, 7.25 During the test temperature vary around 75-80 degree - something that I could not imagine before installing the thermald. One virtual machine and a minute of compilation or R calculations would certainly cause overheating shutdown. Actually, as far as can explain the results, the thermald do a CPU scaling of the CPU speed in range 2.5-2.8 GHz - about 1 GHz below the maximum speed - something that I definitely agree. Scaling is done after the rise of the temperature and I do not experience any inconvenience, troubles or interruptions with the lower speed. ** Attachment added: "Thermald conf file" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873083/+attachment/5387703/+files/thermal-conf.xml -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to thermald in Ubuntu. https://bugs.launchpad.net/bugs/1873083 Title: Lenovo Yoga C940 frequently does thermal shutdown Status in linux package in Ubuntu: Incomplete Status in thermald package in Ubuntu: Confirmed Status in Gentoo Linux: New Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1873083/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
