Xen cannot find Dom0 kernel

[Demi Obenour]

On my system, Xen cannot find the dom0 kernel.  The happened after a kernel-latest upgrade, possibly due to a missing initramfs.

Is there a way to recover without live media?  Ideally, Xen would prompt the user for a dom0 kernel entry, but it doesn’t.

Also, once I have recovered, how can I keep such problems from happening again?

[awokd]

Demi Obenour:

If booting UEFI (and it sounds like you are), see
https://www.qubes-os.org/doc/uefi-troubleshooting/#accessing-installer-rescue-mode-on-uefi.

Sometimes this issue is caused by your EFI partition running out of free
space. Were there any warning messages on the update? You might not even
see them if you used the widget and didn't look at detail. If you need
to clean up to make room, make sure to leave at least one known good set
of files in EFI and set your xen.cfg to point to it.

[donoban]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

On 5/14/19 12:47 AM, 'awokd' via qubes-users wrote:
> Demi Obenour:
>> On my system, Xen cannot find the dom0 kernel. The happened
>> after a kernel-latest upgrade, possibly due to a missing
>> initramfs.
>>
>> Is there a way to recover without live media? Ideally, Xen would
>> prompt the user for a dom0 kernel entry, but it doesn’t.
>>
>> Also, once I have recovered, how can I keep such problems from
>> happening again?
>>
> If booting UEFI (and it sounds like you are), see
> https://www.qubes-os.org/doc/uefi-troubleshooting/#accessing-installer

- -rescue-mode-on-uefi.

>
>
>
> Sometimes this issue is caused by your EFI partition running out of
> free space. Were there any warning messages on the update? You
> might not even see them if you used the widget and didn't look at
> detail. If you need to clean up to make room, make sure to leave at
> least one known good set of files in EFI and set your xen.cfg to
> point to it.
>
>

Hi, I had this problem on last updates. Fortunately I noticed the
error message and fixed it manually before rebooting.

I think the package should restore old xen.cfg if the installation fails
.
-----BEGIN PGP SIGNATURE-----
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=8eMd
-----END PGP SIGNATURE-----