boot error, cannot upgrade kernel

[Oliver Grawert]

hi, 
Am Montag, dem 10.01.2022 um 14:46 -0700 schrieb Gary Aitken:
> On 1/10/22 5:18 AM, Oliver Grawert wrote:
> > hi, Am Donnerstag, dem 06.01.2022 um 22:13 -0700 schrieb Gary
> > Aitken:
> > 
> > > Error: file /boot/vmlinuz-5.15.6-091906-generic has invalid
> > > signature
> > 
> > this is definitely not a proper ubuntu kernel (looks like some
> > mainline debug thingie that you do not want to run in production),
> > where did you get it from ...
> 
> I'm pretty sure the two I've tried are proper kernels, download from
> 
>    https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D
> 
> Checksums validated.
> 
> Not for production, to be sure; but I'm putting them on a new laptop
> and
> the reason for the update is to get the laptop working better.

well, these kernels do not get any QA or testing, they do not use the
ubuntu kernel configuration (which will lead to plenty of userspace
bits behaving wrongly/differently due to assumptions and expetctations
they make), miss the ubuntu-sauce patchset (of which quite a few are
security related patches) ... and installing them means you will not
have functional automatic kernel updates anymore ...

they are also not signed so in case you are using secure boot (which is
a rather good idea to use on a mobile machine like a laptop) they (or
rather your UEFI) will simply refuse to boot.

these packages are nightly auto-builds of plain kernel.org source that
nobody looks after. they exist so the kernel team can ask you to
temprary install them for a quick test to verify that certain bugfixes
made it upstream.

said that, you are indeed free to use them day to day, just take the
above into account :) 

ciao
	oli
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