LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 INSTALL
LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 MANUAL
LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 WINDOWS 8
LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 DOWNLOAD

LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 MANUAL

Manual mode In manual mode, the fan level is forced to the given value and the EC will auto-regulate the fan to maintain at a (roughly) constant RPM, which is model-dependent. The, for example, changes the profile of speeds the automatic mode should use depending on battery status. Note that the ACPI DSDT may supplement this in some models. This error can be intermittent and can prevent booting (Error 'Fan error') Automatic mode In automatic mode, the embedded controller sets the fan speed automatically according to system temperatures and some unknown algorithm. If the speed reported is 65335, then is typically due to a broken fan assembly. Beware: this is the same register used for brightness control in other models. On the X61/X61s, one must select through EC register 0x31 bit 0 which fan the tachometer registers will expose (Firmware 7M). Not much is know about the tachometer in earlier models, or even whether they had one or not. The HFSP register controls both fans at the same time in the X61/X61s.įan Tachometer The embedded controller registers 0x84 (LSB), 0x85 (MSB) are the main fan tachometer, and report fan speed in RPM in everything since the and maybe a little earlier. Later ThinkPad models seem to take at least 5s to start responding to a fan mode change, for example.Īfter boot, the HFSP register may not reflect the true state of the EC (on some models it reads 0x07 even though the EC is actually in automatic mode).

ACPI DSDT register HFSP (8 bits, offset 0x2F in the EmbeddedController address space, accessed through the standard EC interface at IO ports 0圆2 and 0圆6) is read/writable and has the following meaning: Bits 7 6 5 4 3 2 1 0 - Value 1 0 * * * * * * - automatic * 1 * * * * * * - disengaged 0 0 N N N N N N - manual (0.63 0=disable fan, 1=min., 7=max) Changing modes may not be immediate on all ThinkPads. It shares the same control register as the main fan (cannot be controlled separately), and exposes a second tachometer. The terminology probably does not match the one used by IBM/Lenovo engineers. The following description may be inaccurate and may vary by model (see list of models above).

Hardware specs The following hardware behavior was discovered experimentally by and neither provided by nor confirmed by IBM/Lenovo. Source and binaries are available through the project on SourceForge. Although I don't use ThinkPad anymore (so I can't test the program), I still try to respond to all emails I get.įor Windows Shimodax's ThinkPad fan control tool offers similar functionality (see at ).

LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 DOWNLOAD

Download links Direct download: I wrote this for my own personal use, and thought that it would be a good idea to release it to the world, and hope that it will be useful to someone!įeel free to send comments, bug reports or a thanks to the e-mail above. Please read README.txt file included in package. And direct download (src + i386 32bit binary). To enable fan control, the module parameter fan_control=1 must be given to thinkpad-acpi. If a battery pack seems to want the fan to always run faster, the only safe thing to do is to make it run faster.įan control operations are disabled by default for safety reasons. While it will probably make the fan spin faster than if the sensor was ignored, that's exactly what would happen when the fan is under EC control, and could very well be the reason for the 'stuck' value in the first place. Even if it seems to be stuck at a certain temperature, you must take that sensor into account. When designing fan-control applets, never ignore a valid thermal sensor.

LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 WINDOWS 8

More Lenovo Fan Speed Control Driver For Windows 8 videos.

Windows Support Center: Learn More: About Lenovo + About Lenovo. To return the fan speed to normal, repeat the above procedure but switch the fan control back to the 'Automatic' setting.

LENOVO FAN SPEED CONTROL DRIVER FOR WINDOWS 8 INSTALL

Install the latest BIOS update on your laptop if necessary.

If your business requires you to do a lot of work from your Lenovo laptop, you've probably noticed an occasional issue with overheating. Lenovo Fan Speed Control Driver For Windows 8 Average ratng: 4,5/5 6794votes

Lenovo fan speed control driver for windows 8