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On 2018-03-17 14:57, qubes-li...@riseup.net wrote:
> 
> 
> Andrew David Wong:
>> On 2018-03-17 11:40, qubes-li...@riseup.net wrote:
>>
>>>> Have you made sure that you have updated the packages in the 
>>>> template and regenerated the DispVM? That's a common source of 
>>>> these problems and fixed it for me.
>>
>>> Yes I've updated and regenerated the dispvm after the dom0 update.
>>
>>
>> Same here. Updating and regenerating did not resolve the issue.
>> Tracking:
>>
>> https://github.com/QubesOS/qubes-issues/issues/3711
> 
> thank you for filing it on gh!
> 
> Assuming the latest updates introduced this regression:
> 
> What would be the step to downgrade to the previous version to
> get dispVMs working again?
> 
> qubes-dom0-update --action=downgrade xen
> something like this or is it necessary to specify 
> all packets individually?
> 

`dnf history undo` or `dnf history rollback` might work, depending on
which is appropriate:

https://unix.stackexchange.com/q/349238

However, I don't know whether this is the optimal way, or whether
it'll break anything, since these are Xen packages. There's also a
concern that downgrading might render the machine vulnerable to
Spectre SP2 again.

- -- 
Andrew David Wong (Axon)
Community Manager, Qubes OS
https://www.qubes-os.org

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