u/samontab

Help to install OpenBSD on an old Asus T100

Help to install OpenBSD on an old Asus T100

I have an old Asus T100-TA which I would like to use with OpenBSD.

I'm able to install Linux in it, but I'm having issues with OpenBSD.

When I try to install OpenBSD, it shows this error: https://i.imgur.com/5r6lUHO.jpeg

> panic: uvm_mapent_addr_insert: map ... insert collision ... > > dump to dev 17,1 not possible > > panic: kmmaplk rwlock ...

Some logs:

> acpi0 not configured > > cpu0: using Silvermont MDS workaround >
> Intel Bay Trail Video / LPC / XHCI

It seems that OpenBSD did detect the SoC (Silvermont core, Bay Trail platform) but ACPI tables weren’t parsed correctly. I think this is might be because some Bay Trail / Cherry Trail Atom devices (2013-2016 era) have incomplete ACPI.

I've read that I could boot without acpi doing this:

> boot> boot -c > > UKC> disable acpi > > UKC> disable mpbios > > UKC> disable smp > > UKC> quit

So I wrote boot -c, and it entered UKC, but it hangs there, no keyboard entry. It looks like this (older 7.7 install photo but it's the same with 7.8: https://i.imgur.com/RmBCk89.png

So, I can't really disable acpi from UKC as the keyboard is not active there. I also tried with a USB keyboard, but that also didn't work.

Can I prepare the media beforehand without acpi or do any other fix?

It would be great to be able to install OpenBSD in this little laptop.

Thanks!

u/samontab — 4 days ago

Hi,

Thanks for this amazing work.

I'm just wondering why the installer uses macOS 13.5 as the stub in the installation process, instead of, say, the latest one or the version the user has, or any other version.

Is there any technical reason for this?

And, regarding the main macOS installation in the same disk, should I keep that up-to-date or is there a risk that an upgrade would not allow booting asahi in the future?

reddit.com
u/samontab — 9 days ago

I currently have Fedora Asahi Remix 43 installed on 50% of the disk and it's running great.

Now I want to give the maximum amount of space to Asahi (with minimal macOS), and also would like to install the recently released version, 44.

Can I simply install the latest version and it will take care of the wiping out and resizing of the partitions currently used by FAR 43? Or should I take care of that manually first, before running the installer?

Thanks for this awesome project.

reddit.com
u/samontab — 15 days ago