Bug #143
closedT420 Touchpad not detected after flashing Coreboot
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Description
In summary, I swapped the stock i5-2520M out with a i7-3632QM, flashed Coreboot (with SeaBIOS as payload), running Win10 and Ubuntu fine (everything works, including thermal and power management). However, the Synaptics touchpad does not seem to be detected/initialised upon POST, but the keyboard and Trackpoint works fine.
Tried flashing the ROM from this Reddit post and also my own build (but using the bin files from the Dropbox folder of the same Reddit post).
https://www.reddit.com/r/thinkpad/comments/5b8d6x/t420_now_works_with_ivybridge_cpu_here_are_the/
Both have the same issue of not detecting/initialising the touchpad and its buttons. At first, thinking it could be a problem with the ribbon cable (as I found out it had a couple of broken pins at the connector), I bought another one and replaced it, but to no avail. To add on to it, Bluetooth is working fine still, so now it couldn't be an issue with the cable/connector. I am wondering if the touchpad is actually kaput but I have no way to find that out. First, would like to explore if I've missed anything on Coreboot, be it flashing or options. To note, the peripherals are all enabled as reflected in nvramcui.
Help certainly most appreciated. This is the final piece of the puzzle to a fully-functioning Ivy-powered T420. Thanks.
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