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Title: ASUS UX533F overheating and fan off with Ubuntu 20.04 LTS Status in linux package in Ubuntu: New Bug description: After installing Ubuntu 20.04 LTS, my laptop's temperature goes fairly high without intensive CPU activity. The fan(s) remain **off** under heavy CPU load and the temperature goes very high. I don't suspect a material failure since I didn't notice such overheating issues anymore with my previous Ubuntu (19.04) (after using sudo prime-select intel). **Config** - ASUS UX533FN - BIOS version 304 (up-to-date) - Kernel: 5.4.0-31-generic (same issue with 5.4.0-29) - NVIDIA GeForce MX150 (with latest NVIDIA driver) Low CPU load ============ Without running anything special, I get the following figures with `sensors` command: ... pch_cannonlake-virtual-0 Adapter: Virtual device temp1: +49.0°C BAT0-acpi-0 Adapter: ACPI interface in0: 15.60 V asus-isa-0000 Adapter: ISA adapter cpu_fan: 0 RPM coretemp-isa-0000 Adapter: ISA adapter Package id 0: +50.0°C (high = +100.0°C, crit = +100.0°C) Core 0: +49.0°C (high = +100.0°C, crit = +100.0°C) Core 1: +48.0°C (high = +100.0°C, crit = +100.0°C) Core 2: +48.0°C (high = +100.0°C, crit = +100.0°C) Core 3: +50.0°C (high = +100.0°C, crit = +100.0°C) acpitz-acpi-0 Adapter: ACPI interface temp1: +49.0°C (crit = +103.0°C) These figures are a too high in my opinion for low CPU load with a room temperature of 20°C. But here come's worse: Heavy CPU load ============== When the CPU is under load, for instance when running `sysbench cpu run` in loop, the temperature increases to 90°C, and no fan is triggered! To get a repeatable CPU load test, I run while true; do echo "One more time..." && sysbench cpu run; done Here are the figures I get in this case (from `sensors` command): ... pch_cannonlake-virtual-0 Adapter: Virtual device temp1: +65.0°C BAT0-acpi-0 Adapter: ACPI interface in0: 15.60 V asus-isa-0000 Adapter: ISA adapter cpu_fan: 0 RPM coretemp-isa-0000 Adapter: ISA adapter Package id 0: +88.0°C (high = +100.0°C, crit = +100.0°C) Core 0: +88.0°C (high = +100.0°C, crit = +100.0°C) Core 1: +70.0°C (high = +100.0°C, crit = +100.0°C) Core 2: +72.0°C (high = +100.0°C, crit = +100.0°C) Core 3: +72.0°C (high = +100.0°C, crit = +100.0°C) acpitz-acpi-0 Adapter: ACPI interface temp1: +86.0°C (crit = +103.0°C) Note 1: The temperature in the room for this test is 20°C. Note 2: I got almost the same issue one year ago with Ubuntu 19.04 and used the sudo prime-select intel workaround. What I already tried ==================== - installing the latest NVIDIA driver, including selecting `intel` with `prime-select` ameliorated the situation but didn't tackle the issue - running `sensors-detect` (YES to all questions) resulted in `coretemp` to be added to `/etc/modules` - running `pwmconfig` didn't work: /usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-31-generic 5.4.0-31.35 ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34 Uname: Linux 5.4.0-31-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sylvain 1710 F.... pulseaudio /dev/snd/pcmC0D0p: sylvain 1710 F...m pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu May 21 20:58:45 2020 InstallationDate: Installed on 2020-05-08 (13 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 13d3:56cb IMC Networks USB2.0 HD IR UVC WebCam Bus 001 Device 003: ID 8087:0aaa Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: ASUSTeK COMPUTER INC. ZenBook UX533FN_UX533FN ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-31-generic root=UUID=1fba935a-ac77-4cdb-bc3a-d3ce26e567d9 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-31-generic N/A linux-backports-modules-5.4.0-31-generic N/A linux-firmware 1.187 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/16/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX533FN.304 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX533FN dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX533FN.304:bd10/16/2019:svnASUSTeKCOMPUTERINC.:pnZenBookUX533FN_UX533FN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX533FN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.family: ZenBook dmi.product.name: ZenBook UX533FN_UX533FN dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. 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