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Re: [LUG] Ubuntu 20.04 lost network
- To: list@xxxxxxxxxxxxx
- Subject: Re: [LUG] Ubuntu 20.04 lost network
- From: comrade meowski <mr.meowski@xxxxxxxx>
- Date: Fri, 24 Jul 2020 19:19:27 +0100
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On 24/07/2020 17:56, Mark Smith wrote:
>> Update: I'm back online by just booting into an old kernel, 5.4.0-41
>> (5.4.0-40 works also), so something is borked in 5.4.0-42...
I think your "| grep ii" might have been unhelpful here as seeing the
other related packages matched from the search but with a different
status would have been useful. It's hard to tell from such a brief
snippet of info but looking carefully, I see linux-modules-extra is
installed for kernels 5.4.0-40 and 5.4.0-41 but not 5.4.0-42. So if your
particular network hardware happens to depend on the support in
linux-modules-extra that would explain why 5.4.0-42 is unhappy.
Also note how your installed packages naming convention for the kernels
changes at exactly 5.4.0-42 too:
linux-image-5.4.0-40-generic 5.4.0-40.44
linux-image-5.4.0-41-generic 5.4.0-41.45
linux-image-unsigned-5.4.0-42-generic 5.4.0-42.46
That looks pretty significant as well.
I would first apt purge everything 5.4.0-42 related and then reinstall
making sure to also include linux-image-5.4.0-42-generic and
linux-modules-extra-5.4.0-41-generic this time. Sometimes Ubuntu systems
just weirdly get random kernel updates wrong - left a "Requires" or a
"Depends" out of the Debian rules when packaging perhaps. I can't tell
you how many times I've seen Ubuntu systems pull in their updated kernel
and immediately trigger DKMS to rebuild the associated modules... only
to fail immediately because the matching linux-headers need to be
installed first but apt has decided to pull them in later, or not at
all. I filed a bug about this and it's still not reliably fixed years
later :[
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