Comment 37 for bug 1949394

(In reply to Srihari Vijayaraghavan from comment #35)
> There's been a change! As per Philip Nye's observation reported above, I too
> got the Elantech trackpad working right after cold power on by disconnecting
> the laptop power cable (at the laptop end) for precisely 60 seconds, as per
> stop watch, before powering laptop up to directly boot in Linux (mainline or
> distribution kernel doesn't really matter in my testing). Then every time
> trackpad gets initialised (as per dmesg|egrep elantech) and works! Now it
> has to be precisely 60 or more seconds off power cable; 55 seconds, then it
> doesn't work.
>
Are You booting Linux before or after connecting the power cord?

It looks like something with the Embedded Controller. It's a chip on the MB that runs some code stored in EEPROM, is driving the leds (battery, AC, running, etc.).

I will ask You to send me Your ACPI tables once I will sort out whether this is legal. You are based in India?