Your post was moved to your topic, as it initially seemed that you were adding a support request to another member’s topic; though, it now appears you were trying to offer assistance, however anecdotal the information may have been.
Because something might work for your issue doesn’t mean it will for those with other hardware; though, I’ll add that trying other kernels is a valid option.
To clarify the comment from @eld24;
Because mhwd-kernel simply doesn’t work when in a chroot environment, pacman would need to be used instead to install a kernel.
Remember, in a chroot environment you are already the Super User (root), so the use of sudo isn’t required.
By way of example, to install kernel 6.12 (LTS) in a chroot environment, the following commands would be used;
pacman -S linux612
mkinitcpio -P
update-grub
followed by a reboot.
A useful tutorial, generally;
I have linked the following “HowTo” which may be useful as a guide, despite the focus being on another GPU. While it may not be a direct solution to the issue at hand, the procedures mentioned might be helpful.
- Manjaro Kernels (Manjaro Wiki)
Mod edit:- Corrected clumsy typos by yours truly.