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[Starbook MK VI - Intel] won't charge on USB PD #153

Closed divico closed 3 months ago

divico commented 3 months ago

I've been running coreboot 24.02 and EC 24.02 for a few days without any problems, but today it suddenly stopped charging via USB PD. It was connected to a Dell WD 19, but plugging in the Starlabs charger didn't solve the problem. As I was in a business video call, I was unable to restart and it completely drained the battery until a hard shutdown. I had to plug in the barrel jack to get it to charge again.

I have no idea how to reproduce this as it seems to be working fine now. The system was running at quite a high load, maybe this is related to #152 . I noticed that the built-in camera would repeatedly connect and disconnect.

I'm happy to help with debugging if you have any ideas on how to track this down.

Sean-StarLabs commented 3 months ago

It's just calibrating, will do a build early next week with this in.

mysfitt commented 3 months ago

@divico The webcam is also on the internal USB bus. There is definitely something weird going on with USB on these machines. The trigger seems to be a high load condition.

Sean-StarLabs commented 3 months ago

Battery calibration has absolutely nothing to do with USB, it's i2c...

divico commented 3 months ago

I'm very much looking forward to this fix. Will it be available on lvfs-testing?

It may just be calibration, but it is a serious usability issue if it suddenly forces a hard shutdown. I'm not competent to understand the code of the fix. I hope the fix is not just about switching off calibration, as I see there is an option to disable it.

While I can't say much about the cause, the correlation between the battery/calibration/non-charging issue and the camera turning on and off was clear. It never happened before and it never happened again.

One question which may be related: today, the power led turned BLUE when connecting the USB PD charger. It did charge the battery but I never saw it blue before. What does BLUE mean?

Sean-StarLabs commented 3 months ago

What does BLUE mean?

Charging the upper limit of the battery.