> >> 
> >> Any advice on how to proceed? Willing to test patches and provide
> >> additional debug info.
> Sorry to reply from a non-Intel account. I would suggest first
> contacting Dell, and then contacting DeLock. This sounds like an
> issue with motherboard firmware and most of what I can help with
> would be with the driver. I think the issues are probably before
> things get to the driver.

Ouch. OK. Can you think of any temporary workaround?

(Other than downgrading to 5.10 again, which I can't since it fails
at the graphics (i915) modesetting...)