CL4 - power LED light when system is down

[chia-hsiu]

Sometimes I saw power LED light but system is down. The way to duplicate is
1. push power button to power up
2. long push power button to force shutdown system and then quickly push power button again to power up
3. try several times. when timing match, you may find sometimes power LED lights but system doesn't up.
I can duplicate on XO-1.75 / XO-4.
UART doesn't dump any useful information, system is down.

[dsd]

Can you capture output from the EC serial console port from when this happens?

[chia-hsiu]

Replying to dsd:

Can you capture output from the EC serial console port from when this happens?

Attached. Sometimes it stop at "soc_sleep: fell".

[chia-hsiu]

Vedio

[Quozl]

Nice video, thanks. I note that the camera LED did not come on that last time.

I have tried to reproduce in the same way, but the problem does not happen for me yet.

Can you please confirm the EC firmware version and the SKU?

[chia-hsiu]

SKU296 C-stage, OFW: Q7B16, EC: 0.3.12
This issue reported by QA in C-stage, but we can't duplicate until yesterday. I can also duplicate on CL2 by using this method, and this issue is harmless.

[chia-hsiu]

I've plugged adapter and battery. If it's in discharging mode, power LED only left 1 second and then turn dark.

[rsmith]

Thanks for the log. This will be fixed in the next EC release. I'll backport the fix to 1.75 as well.

[chia-hsiu]

I can duplicate use 0.3.13 on SKU296. OFW is Q7B16.

[Quozl]

Thanks. Fix is not in 0.3.13, as 0.3.13 was needed quickly. We plan to include in next release instead.

[Quozl]

Is in 0.4.00 in Q7B18.