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docs: align lid-hibernate spec with PARTUUID-based resume

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Spec said `findmnt -no UUID /` and `resume=UUID=` but the script
correctly uses PARTUUID throughout (matches the system's existing
root=PARTUUID= convention).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
funman300
2026-05-10 17:18:25 -07:00
parent 126b03ad26
commit e3a6986f81
1 changed files with 3 additions and 3 deletions
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docs/superpowers/specs/2026-05-10-lid-hibernate-design.md
+3 -3
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@@ -50,10 +50,10 @@ Hibernation prerequisites are NOT met: only zram swap (4 GiB, RAM-backed, can't
1. **Swap file.** `btrfs filesystem mkswapfile --size 16g /swapfile` (handles NOCOW, alignment, mkswap in one). Skip if `/swapfile` exists with size ≥14 GiB. 1. **Swap file.** `btrfs filesystem mkswapfile --size 16g /swapfile` (handles NOCOW, alignment, mkswap in one). Skip if `/swapfile` exists with size ≥14 GiB.
2. **Activate.** `swapon /swapfile`. Append `/swapfile none swap defaults 0 0` to `/etc/fstab` if absent. 2. **Activate.** `swapon /swapfile`. Append `/swapfile none swap defaults 0 0` to `/etc/fstab` if absent.
3. **Compute resume params.** 3. **Compute resume params.**
- `RESUME_UUID=$(findmnt -no UUID /)` → root filesystem UUID (currently `60cbc9b9-3631-4f9a-925c-a45e0920eb17`) - `ROOT_PARTUUID=$(findmnt -no PARTUUID /)` → root partition's GPT PARTUUID (matches the existing `root=PARTUUID=…` convention in `/etc/kernel/cmdline`)
- `RESUME_OFFSET=$(btrfs inspect-internal map-swapfile -r /swapfile)` → physical offset of swap file - `RESUME_OFFSET=$(btrfs inspect-internal map-swapfile -r /swapfile)` → physical offset of swap file
4. **mkinitcpio hook.** Edit `/etc/mkinitcpio.conf` HOOKS array to insert `resume` between `block` and `filesystems`. `sed` guarded so a re-run is a no-op. 4. **mkinitcpio hook.** Edit `/etc/mkinitcpio.conf` HOOKS array to insert `resume` between `block` and `filesystems`. `sed` guarded so a re-run is a no-op.
5. **Kernel cmdline.** Append `resume=UUID=$RESUME_UUID resume_offset=$RESUME_OFFSET` to `/etc/kernel/cmdline` if not already present. 5. **Kernel cmdline.** Append `resume=PARTUUID=$ROOT_PARTUUID resume_offset=$RESUME_OFFSET` to `/etc/kernel/cmdline` if not already present.
6. **Regenerate UKI.** `mkinitcpio -P` → produces `/boot/EFI/Linux/arch-linux-zen.efi` with new HOOKS + cmdline baked in. 6. **Regenerate UKI.** `mkinitcpio -P` → produces `/boot/EFI/Linux/arch-linux-zen.efi` with new HOOKS + cmdline baked in.
7. **Reboot.** Print explicit instruction; do not auto-reboot. 7. **Reboot.** Print explicit instruction; do not auto-reboot.
@@ -106,7 +106,7 @@ After running `scripts/enable-hibernation.sh` and rebooting:
```bash ```bash
swapon --show # /swapfile, ≥14 GiB, prio low swapon --show # /swapfile, ≥14 GiB, prio low
cat /proc/cmdline # contains resume=UUID=… resume_offset=… cat /proc/cmdline # contains resume=PARTUUID=… resume_offset=…
systemctl status systemd-hibernate.service systemctl status systemd-hibernate.service
``` ```