2 Bronze

Dell XPS 13 9300 - Shutdowns after OS start when unplugged


Yesterday I have bought a recent XPS 13 9300, and today found out it sometimes shuts after unplugging. It can be immediate or take some time.


Additional problem info:

- It only happens when NOT connected to the charger (AC)

- It only happens when under startup process or sudden load (CPU goes over 3.0GHz what is I think it shouldn't do without charger)

- It shows "ASF2 force off" and then "WDT" errors in BIOS logs

- Max clock speed is 1.5 GHz, min 0.4 GHz, current 3.5 GHz (in BIOS)

- No thermal event logs in BIOS

- Upgrading BIOS (.6 -> .11) or drivers had no effect

- Safe mode does not cause shutdowns (CPU capped at 1.5GHz)

- Boot menu works fine without AC

- Windows Event Manager had no logs about shutdowns or about launches without AC

- All possible dell diagnostics (SupportAssist in BIOS or as an app) show no errors

- Nor full Windows reinstall nor install of Manjaro helped


Does anyone have any idea what might cause this?

My thought is that is caused by some kind of CPU management under OSes which windows safe boot can bypass (it doesn't slow down without charger or after unplugging charger and that maybe generates a response to shutdown)

And yes, when I say shutdown I don't mind proper one, the laptop just turns off in instance some times keeping the keyboard lights on

But step Disabling turbo boost OR disabling speed step & shift keeps it stable CANT be reproduced

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I have this problem too - seems to be manifesting in the same way.

Did you find a solution?

Can you please share the solution with me, i have the same exact problem and i just bought the device 

I have the exact same problem with a brand new xps13 9300. Any idea how to fix it?

I have exactly same problem - is something new?

2 Bronze

Disabling C-State control from BIOS  fixed the issue.


That's great news. Thanks for sharing this update with us. Should you need any assistance, feel free to reach out to us. 

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Prajwal here from Dell community.

I'm glad to hear that the issue is resolved after the changes made in BIOS.

As the issue is resolved, we'll be archiving the case from our end.

Feel free to drop us a message if you need any further assistance.
We'll be glad to assist you.



I think you need to contact the original post owner @ibvfteh and confirm the issue is resolved on their using the C-State workaround. Then release a BIOS patch. Disabling C-State is just a temporary workaround to make the laptop usable. Not a solution to the actual problem.

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