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Promotes linux-hardened to the sole primary kernel and replaces
linux with linux-lts as the safety-net fallback. Rationale:
- linux and linux-hardened track the same upstream major version
and ship within days of each other, so 'linux' was a poor
fallback for the regression class that historically takes out
the hardened kernel on this hardware (e.g. checkpoint 026
wake-from-suspend panic). linux-lts lags by weeks/months and is
almost always known-good when hardened breaks.
- Drop etc/mkinitcpio.d/linux.preset, add linux-lts.preset.
Hardened preset header + bootstrap.sh efibootmgr instructions
updated accordingly (hardened registered first so it's the
default; lts registered as the on-demand fallback).
- Also add mkinitcpio-firmware (AUR) to silence the spurious
'missing firmware' warnings during initramfs builds.
Manual host-side steps after deploy:
paru -S linux-lts linux-lts-headers mkinitcpio-firmware
sudo pacman -Rsn linux # or via 'just pkg-apply' undeclared flow
sudo rm -f /etc/mkinitcpio.d/linux.preset # chezmoi-deployed, not pkg-owned
sudo mkinitcpio -P
sudo efibootmgr # add the Arch LTS entries, drop the stock linux ones
Note: meta/nvidia.txt still lists 'linux-headers' for nvidia-dkms.
That's a per-host concern; flagged for follow-up if any nvidia host
moves to the linux-lts world.
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sommerfeld