ACPI issues on ThinkPad T21 + Dock

[Eirik Oeverby]

Hello all!

I've been tinkering with 5.1 (-current) for a while now, ever since it 
was released. I checked out code and recompiled my kernel as late as 
yesterday evening. Since the install, I have encountered a few problems 
that I'd like to discuss:

- When my machine is docked, I *have to* enable ACPI, otherwise it will 
not boot past 'Mounting root from ufs:/dev/ad0s1a' (and the following 
WARNING about / not being unmounted cleanly, if the next point happened 
to be true)

- When booted with ACPI enabled (docked), the machine will at some point 
simply power itself off. I have seen people complaining about similiar 
machines powering themselves *on* after a power-off, but in my case it's 
the opposite. Out of nothing, with no warning (that I can see), it 
simply powers off. It's not suspend either, or hibernation or anything.

- I have not been able to reproduce any of these problems while the 
machine is undocked. In fact, it seems to work pretty well both on 
battery power and while plugged in - it's only while it's docked I'm 
having these problems. They are consistent and effectively keep me from 
using the computer while docked.

If anyone wants to look more into this, I'll be happy to provide 
whatever information is necessary. Please let me know. The system is 
running at the latest firmware level. There are no 'firmwares' for the 
docking station, so there is nothing I can do there.


/Eirik Oeverby