I have my old ThinkPad X201 with one specific problem: both Shift keys on the main keyboard are not working.
The issue appeared when the provious owner reinstalled Windows. I've installed Manjaro 18.04, but the problem persisted.
External keyboards work just fine (actually, I'm typing from one right now), but the onboard one doesn't.
showkey, but got no shift keycode. I've tried
xev, but got no shift output whatsoever. I've digged through the BIOS to see anything that could affect such behaviour, but still got nothing. Now I don't know what may be the cause of this problem, and how to solve it.
One of the possible solutions may be reinstalling the BIOS, but to me that seems risky (haven't done it and don't know how to do that yet), thus any other solution would be preferred.
I've tried to reflash the BIOS using
geteltorito (like this instruction), successfully booted into the created bootable USB drive, followed the instructions with no errors, but the Shift keys still don't work. As for EC, I couldn't find any info about how to update/reflash it. Any suggestions on what to do next? Because apart from replacing the keyboard I'm clueless. Or any suggestions where to find help might also be good.
I've succesfully downgraded and then updated my BIOS and EC, but Shift keys remained numb at all times. I've removed plastic piece under the Thinkvantage button to see if there was any water damage, but there were no signs of it. So I think my next step would be to manually probe the keyboard ribbon to see if Shift keys make contact at all. If not - then 20 dollar keyboard is my choice, but if yes - then it might be problems with motherboard. Any suggestions on what to do would be appreciated.
I've removed my keyboard and probed the contacts to see if shifts even make contact at all. Unfortunately they do, that means that the problem is with the motherboard. fml.