I have never seen or used the command, and it doesn’t exist on my machine.
So if you’ve used it, it must have been some external application, perhaps this one:
In which case you should probably contact the developer.
mwhd is fine and installed here:
$ mhwd-kernel -li
Currently running: 6.18.9-1-MANJARO (linux618)
The following kernels are installed in your system:
* linux612
* linux618
So double-check it’s installed for you, that you haven’t removed it, even by accident:
pamac search --installed mhwd
These are all mine:
$ pamac search --installed mhwd
mhwd-nvidia-575xx 575.64.05-3 extra
MHWD module-ids for nvidia 575.64.05
mhwd-nvidia-570xx 570.211.01-1 extra
MHWD module-ids for nvidia 570.211.01
mhwd-nvidia-470xx 470.256.02-15 extra
MHWD module-ids for nvidia 470.256.02
mhwd-nvidia-390xx 390.157-21 extra
MHWD module-ids for nvidia 390.157
mhwd-nvidia 590.48.01-3 extra
MHWD module-ids for nvidia 590.48.01
mhwd-db 20260107-1 extra
Manjaro Linux Hardware Detection Database
mhwd-ati 19.1.0-1 extra
MHWD module-ids for ati 19.1.0
mhwd-amdgpu 19.1.0-1 extra
MHWD module-ids for amdgpu
mhwd 0.6.6-6 extra
Manjaro Linux Hardware Detection library and application
I remmeber that I have stopped upgarding nvidia-dirvers for my old nvidia-GPU(1080).
And add followings to IgnorPKG and removed mhwd, mhwd-db at last upgrade.
Do you have any idea to install and use mhwd for my old nvidia-GPU.
yay -S mhwd-db
Sync Explicit (1): mhwd-db-20260107-1
:: mhwd-db is in IgnorePkg/IgnoreGroup. Install anyway? [Y/n]
resolving dependencies...
warning: ignoring package mhwd-nvidia-590.48.01-2
warning: cannot resolve "mhwd-nvidia>=455", a dependency of "mhwd-db"
warning: ignoring package mhwd-0.6.6-6
warning: cannot resolve "mhwd", a dependency of "mhwd-nvidia-390xx"
warning: cannot resolve "mhwd-nvidia-390xx", a dependency of "mhwd-db"
warning: ignoring package mhwd-nvidia-470xx-470.256.02-15
warning: cannot resolve "mhwd-nvidia-470xx", a dependency of "mhwd-db"
warning: ignoring package mhwd-nvidia-570xx-570.211.01-1
warning: cannot resolve "mhwd-nvidia-570xx", a dependency of "mhwd-db"
warning: ignoring package mhwd-nvidia-575xx-575.64.05-3
warning: cannot resolve "mhwd-nvidia-575xx", a dependency of "mhwd-db"
:: The following package cannot be upgraded due to unresolvable dependencies:
mhwd-db
:: Do you want to skip the above package for this upgrade? [y/N]
error: failed to prepare transaction (could not satisfy dependencies)
:: unable to satisfy dependency 'mhwd-nvidia>=455' required by mhwd-db
:: unable to satisfy dependency 'mhwd' required by mhwd-nvidia-390xx
:: unable to satisfy dependency 'mhwd-nvidia-390xx' required by mhwd-db
:: unable to satisfy dependency 'mhwd-nvidia-470xx' required by mhwd-db
:: unable to satisfy dependency 'mhwd-nvidia-570xx' required by mhwd-db
:: unable to satisfy dependency 'mhwd-nvidia-575xx' required by mhwd-db
-> error installing repo packages