Issue #642 has been updated by Janez Novak.
Walter Sonius wrote in #note-10: > It was common for a while to report ongoing coreboot bugs in the release > notes ~25.03, therefor a existing > [bug#439](https://ticket.coreboot.org/issues/439) may have missed our > attention but still confirms your current observation of missing turbo. > > About the high(er) temperatures, did you manually disable ME after running > coreboot in IFD or cmos/cfr option or using a (over)cleaned ME, your current > config file doesn't resemble this but you may have flashed it with `--ifd -i > bios` while already having a cleaned ME? > > Running coreboot especially with (over)cleaned ME on my x201 disabled all > auto FAN behavior in worst case it is 100% silent until CPU reaches \~100 > degrees and only than it will start spinning at high RPM until it reaches a > certain threshold and just stops again. Replacing the cool paste, I was able > to keep it idle at 35 degrees without any FAN spin up on coreboot. To keep > normal FAN behavior don't touch the ME. Using the m520 CPU a while ago I > noticed that it can go to 60\~70 degrees while using on intense website but > would go back to 45 degrees with simpler websites. No, i didn’t manually disable ME. When first flashing i used me_cleaner to neutralise it before flashing and disabled the option to clean it in coreboot config but that made the fan not spin at all and the laptop didn’t seem to turn on. I have then not used me_cleaner and also disabled the option to neutralise it in config. > Did you do any manual FAN tuning on OEM BIOS on the linux distribution you > were running with tools like `thinkfan`, these older settings may need to be > changed. Did you record RPM FAN speed differences besides the temperature > differences? No, i didn’t do any manual fan tuning before. I didn’t record RPM differences yet but it seems to be using the stock BIOS fan curve. Temperatures are definitely not higher because of lower fan speed. Fan is working normally and is keeping up with CPU temperature. ---------------------------------------- Bug #642: x201t Turbo boost not working, CPU running hot https://ticket.coreboot.org/issues/642#change-2282 * Author: Janez Novak * Status: New * Priority: Normal * Category: chipset configuration * Target version: main * Start date: 2026-05-03 * Affected versions: main * Affected hardware: Lenovo X201 Tablet * Affected OS: All ---------------------------------------- Hello, i installed Coreboot on my x201t but turbo boost isn’t working and cpu won’t go past 2.1 GHz. My processor is an i7 640LM. Something i also noticed is that the system runs hotter with coreboot than with stock bios but i don’t know what’s causing that. ---Files-------------------------------- Kernel Logs.md (80.4 KB) Coreboot Logs.md (152 KB) Powertop Screenshot.png (34.5 KB) .config (22.3 KB) Coreboot Logs New.md (87.9 KB) Kernel Logs New.md (79.4 KB) Kernel Logs Stock BIOS.md (91.9 KB) -- You have received this notification because you have either subscribed to it, or are involved in it. To change your notification preferences, please click here: https://ticket.coreboot.org/my/account _______________________________________________ coreboot mailing list -- [email protected] To unsubscribe send an email to [email protected]
