Re: Qubes OS 4.1 under the Heads

[Jan Beulich <jbeulich@xxxxxxxx>]

On 24.08.2020 12:33, Norbert Kaminski wrote:
> I'm trying to boot Qubes 4.1 under the Heads (http://osresearch.net/).
> The Heads uses kexec to run the Xen 4.13 with Qubes kernel. During the
> boot process on the screen appear colorful artifacts, which are shown in
> this issue:
> 
> https://github.com/osresearch/heads/issues/789
> 
> The installation media booted properly when I replaced the hypervisor to
> the stable-4.11. So I've bisected Xen from the 4.11 to 4.13 version and
> I found out that problems start with:
> 
> https://github.com/xen-project/xen/commit/dcf4179
> 
> This is the first commit where Qubes OS doesn't boot properly. The Qubes
> kernel cannot find the LUKS UUID and boot ends in the emergency mode.

The commit in question doesn't look like a prime candidate to
cause such a regression, so I guess we'll need sufficiently
verbose logs (ideally with a debug=y Xen) at least for the
problem case, but even better would be one last-known-good log
in addition for comparison.

> The colorful artifacts appear in this commit:
> 
> https://github.com/xen-project/xen/commit/07c181c

Did you previously make use of the option this commit removes?
If so, the description's claim of the code being dead may have
been wrong. If not, without further details (logs, as per
above) I guess it'll again be hard to diagnose anything here.

Jan