From: Patrick Wildt <patrick@blueri.se>
Subject: Re: smmu(4) on QC Laptops
To: Landry Breuil <landry@openbsd.org>
Cc: tech@openbsd.org, kettenis@openbsd.org, tobhe@openbsd.org, mlarkin@openbsd.org
Date: Fri, 23 May 2025 10:22:19 +0200

On Fri, May 23, 2025 at 09:20:52AM +0200, Landry Breuil wrote:
> Le Fri, May 23, 2025 at 08:46:16AM +0200, Patrick Wildt a ?crit :
> > Hi,
> > 
> > Nearly three years ago we disabled smmu(4) for QC laptops because they
> > just rebooted instantly.  I've finally gone to the bottom of why this
> > happens.
> <snip>
> > Please give this a go on machines where `dmesg | grep ^smmu' gives
> > output, and especially on QC machines with X1E, or SC8280XP/ThinkPad
> > x13s.  Please send me some dmesgs, as I have added some debug code
> > that I'd like to see run on other machines. :)
> 
> doesnt blow up on the hp omnibook, dmesg below.

I forgot to mention, this needs a `make config` because of the early
attach change that I forgot to mention, otherwise smmu1 pops up too
late :/  Can you give it another try?  Thanks!