Can't install DKMS modules

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1

I’m installing v4l2-loopback, which I’m pleased to find exists in the official repos as a dkms module. Unfortunately, it fails to install. Here’s a simplified log of me installing dkms and v4l2:

Synchronizing package databases...
Resolving dependencies...
Checking inter-conflicts...
Download of linux414-headers (4.14.203-1)
Download of dkms (2.8.3-1.1)
Download of linux58-headers (5.8.18-1)
Checking keyring...
Checking integrity...
Loading packages files...
Checking file conflicts...
Checking available disk space...
Installing dkms (2.8.3-1.1)...
Installing linux414-headers (4.14.203-1)...
Installing linux58-headers (5.8.18-1)...
Running post-transaction hooks...
Arming ConditionNeedsUpdate...
Updating module dependencies...
Install DKMS modules
Done. (this exited as a success according to pamac)

Synchronizing package databases...
Resolving dependencies...
Checking inter-conflicts...
Download of v4l2loopback-dkms (0.12.5-1)
Checking keyring...
Checking integrity...
Loading packages files...
Checking file conflicts...
Checking available disk space...
Installing v4l2loopback-dkms (0.12.5-1)...
Running post-transaction hooks...
Arming ConditionNeedsUpdate...
Install DKMS modules
==> dkms install --no-depmod -m v4l2loopback -v 0.12.5 -k 5.8.18-1-MANJARO
==> depmod 5.8.18-1-MANJARO
==> Unable to install module v4l2loopback/0.12.5 for kernel 4.14.203-1-MANJARO: Missing kernel modules tree.

Do you know what went wrong, and how I could fix it? Google seems to point to missing headers being the issue, yet linux58-headers was installed above. Thanks in advance.

2

Update your system, reboot and try again.

3

I think that will not do anything

since the issue is kernel 4.14 which does not uninstall with an update.

For a DKMS package to install all installed kernels need there headers installed.
I ask myself why 4.14 is still installed, perhaps removing this kinda old kernel is a better idea

4

I’m on 5.8-MANJARO, and installed dkms with pamac. I selected linux58-headers and 414 is installed automatically, along with 58. Should I remove 414 and try again?

5

In principle a second kernel is advisable. If you currently run 5.8 [EOL] you should install another kernel not beeing EOL, check in #announcements. After installing e.g.5.9 or 4.19 (incl. headers), remove 4.14 (via MSM for example), reboot and then you could retry.

6

thanks for the advice, will attempt

7

on second thought i’ll wait for 5.10 as its going to be an LTS kernel and I don’t want to do this more times than necessary