Still a problem on latest 20.04 kernel, 5.11.0-36-generic. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.11 in Ubuntu. https://bugs.launchpad.net/bugs/1939628
Title: Fan goes full speed on resume from suspend (Lenovo ThinkPad T460) Status in linux-signed-hwe-5.11 package in Ubuntu: Confirmed Bug description: On resume from suspend the fan goes full speed. Regression - this only happens intermittently on kernel 5.8.0-63, but happens every time on kernel 5.11.0-25. Running `sensors` after resume shows: ``` $ sensors thinkpad-isa-0000 Adapter: ISA adapter fan1: 4776 RPM temp1: N/A temp2: N/A temp3: +0.0°C temp4: +0.0°C temp5: +0.0°C temp6: +0.0°C temp7: +0.0°C temp8: +0.0°C coretemp-isa-0000 Adapter: ISA adapter Package id 0: +30.0°C (high = +100.0°C, crit = +100.0°C) Core 0: +29.0°C (high = +100.0°C, crit = +100.0°C) Core 1: +28.0°C (high = +100.0°C, crit = +100.0°C) BAT0-acpi-0 Adapter: ACPI interface in0: 11.82 V iwlwifi_1-virtual-0 Adapter: Virtual device temp1: +31.0°C pch_skylake-virtual-0 Adapter: Virtual device temp1: +29.5°C BAT1-acpi-0 Adapter: ACPI interface in0: 11.06 V acpitz-acpi-0 Adapter: ACPI interface temp1: +48.0°C (crit = +128.0°C) ``` Using kernel 5.11.0-25, `thinkpad-isa-0000 - temp1` shows a temperature prior to suspend, then it consistently shows `N/A` after resume. Using kernel 5.8.0-63, `thinkpad-isa-0000 - temp1` shows a temperature when the fan control is working normally (which fails intermittently following suspend/resume) and shows `N/A` when it does not work. ``` $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=20.04 DISTRIB_CODENAME=focal DISTRIB_DESCRIPTION="Ubuntu 20.04.3 LTS" ``` ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.11.0-25-generic 5.11.0-25.27~20.04.1 ProcVersionSignature: Ubuntu 5.11.0-25.27~20.04.1-generic 5.11.22 Uname: Linux 5.11.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.18 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu Aug 12 00:47:13 2021 InstallationDate: Installed on 2020-05-02 (466 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) SourcePackage: linux-signed-hwe-5.11 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.11/+bug/1939628/+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
