## Summary

On a T2 MacBookPro15,1, lid close sleeps cleanly but lid open stayed black for **~22 seconds** before the lock appeared. Adding **`pcie_ports=compat` back** next to the current T2 flags dropped that to **~2–3 seconds**.

Omarchy [PR 6562](https://github.com/basecamp/omarchy/pull/6562) treated `pcie_ports=compat` as obsolete and *replaced* it with `pm_async=off mem_sleep_default=deep`. `pm_async=off` is still needed (suspend reliability). `pcie_ports=compat` is still needed (wake speed). They are not substitutes.

## Machine

- DMI: `MacBookPro15,1` (15" 2018/2019, Intel UHD 630 + AMD Baffin, panel on amdgpu `card2-eDP-1`)
- Omarchy 4.0.0-1, kernel `7.1.8-arch1-Watanare-T2-3-t2`
- T2 stack: `t2bce_*` loaded, no `apple_bce`, no apple-bce rmmod sleep units
- Wi-Fi: BCM4364 `14e4:4464` (left bound)
- Before: `intel_iommu=on iommu=pt pm_async=off mem_sleep_default=deep` (`pm_async=0`, `mem_sleep=s2idle [deep]`)
- After: same line plus `pcie_ports=compat`

## Timeline (one lid cycle, no `pcie_ports=compat`)

Stopwatch lid-open-to-lock-visible: **22.43s**. `systemctl suspend` + spacebar: **22.65s** (lid ACPI path is innocent).

| Mark | Time |
| --- | --- |
| `Lid opened` | T=0 |
| amdgpu GART/UVD/VCE up | T+0.07s |
| `PM: suspend exit` | T+2.25s |
| First lock PAM | T+10.3s |

The extra ~15s of black is **before** logind's `Lid opened`. Kernel device resume is only ~2s. No blocking `sleep N` in `/usr/lib/systemd/system-sleep`. amdgpu is not the 22s.

After adding `pcie_ports=compat`, `limine-update`, reboot:

| Cycle | Stopwatch | `Lid opened` → `PM: suspend exit` |
| --- | --- | --- |
| Lid | <2s (lock was up before the watch) | 1.73s |
| Lid, later | ~3s | 2.32s |

Still sleeps, still locks, keyboard/trackpad re-enumerate. Remaining ~2s is T2 S3 kernel resume.

## Cause in Omarchy

`migrations/1785944594.sh`:

```sh
sed -i 's/pcie_ports=compat/pm_async=off mem_sleep_default=deep/'
```

`install/hardware/apple/fix-t2.sh` now writes:

```
KERNEL_CMDLINE[default]+=" intel_iommu=on iommu=pt pm_async=off mem_sleep_default=deep"
```

That is why a 4.0 T2 install has no `pcie_ports=compat`.

## Proposed fix

Keep `pm_async=off mem_sleep_default=deep`. **Add** `pcie_ports=compat`; do not substitute.

`fix-t2.sh`:

```
KERNEL_CMDLINE[default]+=" intel_iommu=on iommu=pt pm_async=off mem_sleep_default=deep pcie_ports=compat"
```

New migration for existing T2 installs: if `/etc/limine-entry-tool.d/t2-mac.conf` exists and does not contain `pcie_ports=compat`, append it with `+=`, then `limine-update`. Do not run the old `s/pcie_ports=compat/.../` substitution again.

## Related

- https://github.com/basecamp/omarchy/pull/6562 (replaced the flag)
- https://github.com/basecamp/omarchy/discussions/4695
- https://github.com/basecamp/omarchy/pull/5998
- https://github.com/basecamp/omarchy/pull/6149

Notes and compact dumps: https://github.com/Gdsimms/omarchy-macbook-wake