No response from LPC


Today when I started up my MNT Reform I got the message:

Waking up LPC… 120%


No response from LPC

The percentage varies, I’ve seen from 104-200% before it return No response from LPC. The machine boots fine, the only issue is that I cannot view battery usage.

The battery monitor has been a bit iffy ever since my batteries got completely drained. I recharged them fully outside the MNT Reform. Then when I put them back in, the battery percentage has always been ??? even when I let them charge inside the laptop. So I was waiting for all batteries to go under 3.2V, then try and recharge them again to see if the LPC would calibrate. I have used the laptop ~1h each weekend for about a month or so. I flashed the new firmware Sep 28.

But today I encountered this issue. The batteries wasn’t completely drained when it happened, I could use the laptop for more than an hour before it died.

Any ideas how to fix it? I tried disconnect the batteries but no change. Should I just reflash the LPC firmware?


Not certain on the exact cause but I would consider reflashing the LPC, could potentially be that you’ve flashed the keyboard but using the old firmware on the LPC that doesn’t need woken up? They’d be somewhat but not fully compatible to have them mixed and cause some oddities.

I flashed both the keyboard and lpc, so I’m pretty sure I didn’t use an old firmware for the LPC. I used the 6642b62 commit last time. For both keyboard and LPC. And it’s been working fine for a month. But who knows maybe I messed something up.

I did a reflashing using the latest (e00dc65) and LPC now wakes up! And my batteries are in a worse state than I thought, some are down to 1.1V maybe that had something to do with the LPC acting up.

Yep, that’s an undervoltage condition, so LPC would probably do an automatic safety shutdown.