It is online again. I did nothing... Perhaps it was rebooting between builds.

Happening again; https://build.chromium.org/p/chromium.perf/builders/Win%20Zenbook%20Perf%20(3)

There are no remaining logs from the latest build, which was interrupted. Labs, can you look into this as a hardware failure? Build interrupted followed by extended offline period suggests this to me.

I'm going to switch out the usb nic on this one.

I just took a look at this.  Battery was drained due to power being disconnected.  Just fixed that up and now it's up.

But I'm going to keep this ticket open as this particular slave has been going offline a lot.

Update: last 6 builds successful.

(downgrading to P2 since we're not currently losing performance data here)

Sounds like this may be fixed?

Yes, it's been up for a couple of weeks now.