2014年6月10日 · ACPI may or may not allow you to adjust the fan settings. Some BIOS implementations may not allow that control though -- they may force control depending on the BIOS/CMOS settings. One might be hard-pressed for a good use case where the BIOS control (even customized) is insufficient. I have come across situations where the BIOS control indeed ...

2021年1月2日 · I've been trying to control the fan of my Lenovo Yoga 910-13IKB laptop (Windows 10) to avoid thermal throttling (I already undervolted the CPU and GPU). To achieve this I need to find a way of modifying the specific registers that control the fan on …

Update your ACPI drivers. Right click on My Computer, go to properties, and select Hardware tab, and click on the device manager. And ungroup Computer, right click on the ACPI multiprocessor PC. Select update drivers. Insert a disk which includes update files and follow the instructions.

There is no easy way to tell if you're running in a bare metal or in a virtual computer, the best thing you can do is to get some hardware info and made an educated guess, for example, if the machine have a network adapter which contains Microsoft, VMware, Oracle, Hyper-V, Virtual or VirtualBox, most likely it's a virtual machine given that neither Microsoft, Oracle, or VMware …

It's worth noting that 9y later the SuperIOs are gone in laptop systems, replaced by the ECs. ECs have their firmware and use the PECI interface to read the DTS of the CPU. The EC's PWM HW is accessible only from the EC, the OS has no longer control over the CPU FAN if not by setting the CPU throttling policy.

2014年1月20日 · SetSpeed Method of the CIM_Fan Class; WMI C++ Application Examples; Example: Calling a Provider Method; Note that some motherboards don't support fan speed changes, and even those that do may not expose this to the WMI. In the best case you may still have to detect the motherboard type and talk to the fan management controllers directly. No …

It runs too loud even when the CPU is idle, and ... if it is like my previous HP nc8430 laptop, the fan speed is set unnecessarily high. It's possible to lower the fan speed, yet keep the CPU temperature the same. I think in order to modify the fan speed I need to patch the DSDT, and that's why I want to decipher the above. Many thanks.

2011年9月12日 · I've a netbook that is running the fan a bit to early for my liking. I've found a Windows-only solution to reducing the fan noise but I'm using Ubuntu on this computer. In the Windows solution the guy is using a program called Notebook Hardware Control (NHC) which, from what I can make out, is reading and setting ACPI values.

2009年8月25日 · Fan speed control via WMI is going to be pretty vendor-specific; there are no general controls for CPU/mainboard fans (though WMI is what people should be doing). Also, this would be way easier in PowerShell or even C# than trying to use C++ to play with WMI stuff. At least figure out how to do it in PSh first, then transcribe it to C++

2018年10月19日 · I enumerate all the devices on a machine as follows: HDEVINFO hDevList = SetupDiGetClassDevs( NULL, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT | DIGCF_ALLCLASSES /*| DIGCF_PROFILE*/ ); for ...