[arch-general] Kernel modules not loaded after Linux update

[Ralf Mardorf]

On Sun, 22 Jul 2018 16:32:49 +0200, Peter Nabbefeld wrote:
>Am 22.07.2018 um 16:10 schrieb Ralph Corderoy:
>> `pacman -Qi linux-headers' should show `Required by' as `None'.  
>
>It shows: "Error: Package 'linux-headers' not found"
>> Remove it with `sudo -i pacman -R linux-headers'.
>>  
>Cannot remove.
>Oops - just looked again at my pacman output - they have never been 
>installed ... obviously I never needed them.

If the query already returns that a package isn't installed it makes no
sense trying to uninstall it.

You probably confused linux-headers with linux-api-headers, since those
are required.

$ pacman -Qs headers | grep linux
local/linux-api-headers 4.16.1-1
local/linux-headers 4.17.8-1
local/linux-rt-cornflower-headers 4.16.18_rt9-1
local/linux-rt-headers 4.16.15_rt7-1
local/linux-rt-pussytoes-headers 4.14.34_rt27-1
local/linux-rt-securityink-headers 4.16.18_rt10-1

$ pactree -r linux-api-headers | head -2
linux-api-headers
└─glibc

On Sun, 22 Jul 2018 16:27:29 +0200, Ralf Mardorf wrote:
>The package is not for packages...

It should read that the cache is not for packages...

However, this isn't troubleshooting, it's wild disorder.

Could you please summarize what exactly doesn't work?

IIUC you can't access the Internet with the computer where you got some
messages about missing kernel modules. IIUC you successfully downgrade
the kernel. We clarified that the linux-headers package is irrelevant.
What happens now, when using the old kernel? Since the issue started
after an update, what else did you update? See pacman.log.