Arch Linux

spark

Member

Registered: 2008-02-23

Posts: 7

[SOLVED]Can't install virtualbox-host-modules-arch for dwngrded kernel

Hello,
i upgraded my system and after reboot i found out that my dual screen is not working.
After peaking to archlinux.org news i found out that nvidia is not compatible with new 5.9.1 kernel.
So i downgraded my kernel to 5.8.8 and nvidia to version 450.66

However, when i install virtualbox and virtualbox-host-modules-arch the
modules get installed for 5.9.1 and modprobe can't see it:

pacman -Ql virtualbox-host-modules-arch
virtualbox-host-modules-arch /usr/
virtualbox-host-modules-arch /usr/lib/
virtualbox-host-modules-arch /usr/lib/modules-load.d/
virtualbox-host-modules-arch /usr/lib/modules-load.d/virtualbox-host-modules-arch.conf
virtualbox-host-modules-arch /usr/lib/modules/
virtualbox-host-modules-arch /usr/lib/modules/5.9.1-arch1-1/
virtualbox-host-modules-arch /usr/lib/modules/5.9.1-arch1-1/extramodules/
virtualbox-host-modules-arch /usr/lib/modules/5.9.1-arch1-1/extramodules/vboxdrv.ko.xz
virtualbox-host-modules-arch /usr/lib/modules/5.9.1-arch1-1/extramodules/vboxnetadp.ko.xz
virtualbox-host-modules-arch /usr/lib/modules/5.9.1-arch1-1/extramodules/vboxnetflt.ko.xz

uname -a
Linux IO 5.8.8-arch1-1 #1 SMP PREEMPT Wed, 09 Sep 2020 18:59:45 +0000 x86_64 GNU/Linux

How can i install virtualbox-host-modules-arch for my current 5.8.8 kernel ?
How is it figuritng out for which kernel is it installing modules ?

Thanks.

Last edited by spark (2020-10-22 12:53:58)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,364

Re: [SOLVED]Can't install virtualbox-host-modules-arch for dwngrded kernel

virtualbox-host-modules-arch always refers to the latest kernel. You either downgrade that in the same way (... that would also mandate a downgrade of virtualbox as a whole in this case though) or more sustainably you install the linux-headers for the kernel you downgraded to and the https://www.archlinux.org/packages/comm … host-dkms/ package to have the modules rebuilt apropriately on your local system.

FWIW the 5.9 incompatibility should not inherently affect multi-monitor systems so you might have had a different underlying issue

Last edited by V1del (2020-10-23 16:23:05)

spark

Member

Registered: 2008-02-23

Posts: 7

Re: [SOLVED]Can't install virtualbox-host-modules-arch for dwngrded kernel

Hello V1del, thanks for reply.
I spotted in another forum post info about -dkms.
And indeed i was missing headers for 5.8.8.
After installing headers and some uninstall/install of -dkms package, it works.

Thanks.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,364

Re: [SOLVED]Can't install virtualbox-host-modules-arch for dwngrded kernel

Please mark as [SOLVED] by editing the title in the first post