Date: Sat, 10 Jun 2023 17:52:21 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271938 Bug ID: 271938 Summary: Excessive heating on Lenovo Thinkpad E450 even with CPU @ 100% idle Product: Base System Version: 13.2-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: firstname.lastname@example.org Created attachment 242716 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=242716&action=edit dmesg info Machine & Model : Lenovo ThinkPad E450 (20DDA02WIG) CPU : Intel Core i5-4300U GPU : Intel Haswell-ULT Integrated Graphics : AMD Topaz XT [Radeon R7 M260/M265...] Year of Purchase : 2016 Issue: My laptop generates excessive heat even without any CPU usage (~100% idle), even when the clock speeds stepped all the way down. The issue seems to be OS (FreeBSD) dependent. Context: I am moving from Linux to FreeBSD, and when I first booted the FreeBSD 13.2-RELEASE DVD, I sensed a lot of unusual heat emanating. The heat persists even after installation and it heats up again as soon as the installed system is rebooted from a complete state of cool down and rest. This happens with both when using the live DVD and after a freshly installed system, tested on both 13.2-RELEASE and 12.4-RELEASE. Observations: - This issue seems to be OS-dependent and it is noticeably cooler in Linux. I confirmed this by reinstalling Linux to verify and installing freebsd-13.2-RELEASE again. - It's not just the different reported temperature, I can actually feel the heat, that's when I first noticed and decided to test further. - Changing dev.acpi_ibm.0.fan: 1 -> 0 and dev.acpi_ibm.0.fan_level: 0 -> 7 settings did not do any good. - Powerd is enabled and running and seems it has no influence. - The issue persists both with and without acpi_ibm loaded. - The temperatures in Linux varies from 43-48 C, while FreeBSD temperature ranges from 53 to 59. This is mostly with CPU @~100% idle. File Attached: - dmesg.boot (dmesg_boot.txt) - output of sysctl dev.cpu (sysctl_devcpu.txt) - output of sysctl hw.apci (sysctl_hwacpi.txt) - output of sysctl dev.acpi__ibm (sysctl_devacpi_ibm.txt) - rc.conf (rc_conf.txt) - loader.conf (loader_conf.txt) -- You are receiving this mail because: You are the assignee for the bug.