Arch Linux

graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,597

Website

Incomplete functionality of dkms on my system

I have nvidia-390xx-dkms and linux-headers installed (booted into the vanilla Arch kernel), but I can't get some of the dkms commands on the wiki page to work at all.  The only directory I have in /usr/src/ is /usr/src/nvidia-390.67 that the package installed.

For example, the status query returns a null with no error code:

# dkms status
#
# echo $?
0

Trying to autobuild fails with no error code:

# dkms autoinstall
#
# echo $?
0

If I install and reinstall the linux package, dkms does not automatically work.

However, if I direct dkms to build then nvidia module manually, it does work.

# dkms install -m nvidia -v 390.67

Creating symlink /var/lib/dkms/nvidia/390.67/source ->
                 /usr/src/nvidia-390.67

DKMS: add completed.

Kernel preparation unnecessary for this kernel.  Skipping...

Building module:
cleaning build area...
'make' -j8 IGNORE_PREEMPT_RT_PRESENCE=1 NV_EXCLUDE_BUILD_MODULES='__EXCLUDE_MODULES' KERNEL_UNAME=4.17.2-1-ARCH modules........
cleaning build area...
Kernel cleanup unnecessary for this kernel.  Skipping...

DKMS: build completed.

nvidia.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/4.17.2-1-ARCH/kernel/drivers/video/

nvidia-uvm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/4.17.2-1-ARCH/kernel/drivers/video/

nvidia-modeset.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/4.17.2-1-ARCH/kernel/drivers/video/

nvidia-drm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /usr/lib/modules/4.17.2-1-ARCH/kernel/drivers/video/

depmod....

DKMS: install completed.

Last edited by graysky (2018-06-21 00:52:03)

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CPU-optimized Linux-ck packages @ Repo-ck  • AUR packages • Zsh and other configs

twelveeighty

Member

From: Alberta, Canada

Registered: 2011-09-04

Posts: 1,096

Re: Incomplete functionality of dkms on my system

Since you have multiple kernels installed, can you try passing in your kernel with -k (dkms status should work as a normal user, afaik):

$ dkms status -k 4.17.2-1-ARCH

Scimmia

Fellow

Registered: 2012-09-01

Posts: 11,559

Re: Incomplete functionality of dkms on my system

Does the hook trigger and do nothing or is it not triggering at all?

graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,597

Website

Re: Incomplete functionality of dkms on my system

@tweleeighty - In an attempt to minimize variables, I removed my custom kernel and am using only the vanilla package.  I get the same null output when I try:

# dkms status -k 4.17.2-1-ARCH
#
# echo $?                        
0

@Scimmia - Ah!  I made some progress on the "why doesn't the hook work" which is my fault.  I had the following in /etc/pacman.d/hooks from a few years ago and forgot about them:

70-dkms-install.hook -> /dev/null
70-dkms-remove.hook -> /dev/null

I have removed them now and pacman is working as expected with them.  The only question that remains unanswered for me is why I can't get the `dkms status` or `dkms autobuild` commands to run.

Last edited by graysky (2018-06-21 00:51:06)

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CPU-optimized Linux-ck packages @ Repo-ck  • AUR packages • Zsh and other configs

twelveeighty

Member

From: Alberta, Canada

Registered: 2011-09-04

Posts: 1,096

Re: Incomplete functionality of dkms on my system

For the status command: the dkms utility is a large Bash script, so you could hack it and throw in some additional "echo" statements to see what's going on there. module_status_built(), I believe, is the function that would be of interest.