Re: [Xen-users] Help debugging boot crash

[James Dingwall <james@xxxxxxxxxxxxxx>]

On Sun, Dec 29, 2019 at 05:25:58PM -0800, Aaron Janse wrote:
> I'm drafting a bug report for xen-devel. To do this, I'm trying to
> reproduce my issue ("IO-APIC + timer doesn't work") on Ubuntu 19.10.
> 
> Unfortunately, I can't figure out how to enable verbose logging on Ubuntu
> w/ Xen.
> 
> Here's what's displayed on the screen when I boot (followed by a reboot).
> 
>     Loading Xen 4.9-amd64 ...
>     Loading Linux 5.4.0-24-generic ...
>     Loading initial ramdisk ...
>     _
> 
> Following the Debugging Xen wiki page [1], I've changed my xen.gz grub
> line to the following, but it doesn't seem to do anything.
> 
>     multiboot2  /boot/xen-4.9-amd64.gz placeholder  loglvl=all 
> guest_loglvl=all ${xen_rm_opts}
> 
> I've tried removing `quiet splash` from the vmlinuz grub line, with no
> success. I've also unsuccessfully tried adding `loglvl=all` to the
> vmlinuz and initrd lines.
> 
> This is on a Dell XPS 13 laptop, so I don't think accessing a seriel
> console would be easy.
> 
> On the Xen wiki [2], I noticed that this might be a UEFI issue:
> > Go into your BIOS and enable Legacy Booting (non-EFI). If it still
> > doesn't work, upgrade the BIOS to its latest version.
> 
> My BIOS is up-to-date and has no option to disable UEFI. Yet, somehow
> Ubuntu w/ Xen is still booting via grub.
> 
> Where should I go from here?

This might be relevant:

https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1851091

James

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-users