To make a long history, short: I think I found the way to switch the EC
tachometer to the secondary fan, which is present on the X61, and maybe
on other Lenovo ThinkPads. Now, I need help from X61 owners (both with
one and two fans) to better narrow it down.
If there are other Lenovo thinkpads wi
On Mon, 01 Jun 2009, Henrique de Moraes Holschuh wrote:
> Here's how it seems to work: Bit 2 of EC register 0x31 sets which fan
Correction: bit *0* of EC register 0x31.
> Then, use "echo 0x31 new_value > /proc/acpi/ibm/ecdump" (where new_value
> is the value you read from ecdump, but with bit 2
