### System details

MSI laptop, Intel UHD 630 iGPU + NVIDIA RTX 2070 Mobile dGPU (muxless hybrid), Omarchy 4.0.3-1, Linux 7.2.3-arch1-3, Hyprland 0.56.2-2, supergfxctl 5.2.7-2, nvidia-open-dkms 610.57.04-1, Limine + UKI boot.

### What's wrong?

Omarchy's GPU cycle is only ever meant to be `Integrated <-> Hybrid`. `default/systemd/system-sleep/force-igpu` uses `Vfio` as an internal transient to detach the nvidia driver across sleep:

```
pre  (hibernate): switch_mode Vfio
post (resume):    switch_mode Vfio  ->  switch_mode Integrated
```

`supergfxd` **persists** that `Vfio` request into `/etc/supergfxd.conf`. `force-igpu` runs under `set -e`, so when `switch_mode Vfio` returns 1 (its confirm poll times out), the script aborts *before* `switch_mode Integrated` ever runs. The saved mode is left at `Vfio`.

`bin/omarchy-toggle-hybrid-gpu` has cases for only two of the three modes:

```bash
case "$gpu_mode" in
"Integrated") ... ;;
"Hybrid")     ... ;;
*)
  echo "Hybrid GPU not found or in unknown mode."
  exit 1
  ;;
esac
```

So once the saved mode is `Vfio`, the menu entry still appears — `bin/omarchy-hw-hybrid-gpu` greps `supergfxctl -s`, which returns `[Integrated, Hybrid, Vfio]` and matches `Hybrid` — but selecting it immediately exits with `Hybrid GPU not found or in unknown mode.` There is no supported way back to **either** end of the cycle.

### Evidence from this machine

The transition failed on 2026-09-12 and was never restored:

```
Sep 12 21:22:26 systemd-sleep[7847]: Could not confirm the GPU transition to Vfio mode
Sep 12 21:22:26 (system-sleep)[7846]: '/usr/lib/systemd/system-sleep/force-igpu' failed with exit status 1.
```

Every boot since (8 of them) has come up in `Vfio`:

```console
$ supergfxctl -g
Vfio
$ supergfxctl -s
[Integrated, Hybrid, Vfio]
$ cat /etc/supergfxd.conf
{
  "mode": "Vfio",
  "vfio_enable": true,
  "vfio_save": false,
  ...
}
```

Note `vfio_save` is `false` — the value Omarchy's own installer writes, which appears intended to stop `Vfio` from being persisted — yet the saved mode is `Vfio` across reboots.

The resulting state is also internally inconsistent. `supergfxd` wrote a blacklist into `/etc/modprobe.d/supergfxd.conf`:

```
blacklist nouveau
blacklist nvidia_drm
blacklist nvidia_uvm
blacklist nvidia_modeset
blacklist nvidia
options vfio-pci ids=10DE:1F10,10DE:10F9,10DE:1ADA,10DE:1ADB,
```

...but nvidia re-loaded and reclaimed the dGPU before `vfio-pci` could bind, so the daemon reports `Vfio` while the hardware is actually running Hybrid:

```console
$ lspci -nnk -s 01:00.0
01:00.0 VGA compatible controller: NVIDIA Corporation TU106M [GeForce RTX 2070 Mobile]
	Kernel driver in use: nvidia
$ ls /sys/bus/pci/drivers/vfio-pci/ | grep ^0000
(no devices bound)
$ nvidia-smi
(works, reports the RTX 2070)
```

### What I expected

Toggling GPU modes should always leave a *supported* mode saved, and the toggle should be able to recover from `Vfio` rather than dead-ending on it.

### Steps to reproduce

1. Hybrid Intel+NVIDIA laptop with `supergfxctl` installed.
2. Menu -> Hardware -> Hybrid GPU -> switch to Integrated. Reboot.
3. Hibernate and resume (or otherwise make `force-igpu`'s `switch_mode Vfio` confirm poll fail).
4. Reboot. `supergfxctl -g` now reports `Vfio`.
5. Menu -> Hardware -> Hybrid GPU -> `Hybrid GPU not found or in unknown mode.`

### Recovery, for anyone who lands here

With `supergfxd` stopped (it rewrites the file while running), set `"mode": "Hybrid"` in `/etc/supergfxd.conf`, delete `/etc/modprobe.d/supergfxd.conf`, remove the two Integrated-only files, regenerate the boot image, and reboot:

```bash
sudo systemctl stop supergfxd
sudo rm -f /etc/modprobe.d/supergfxd.conf
sudo rm -f /usr/lib/systemd/system-sleep/force-igpu
sudo rm -f /etc/systemd/system/supergfxd.service.d/delay-start.conf
# edit /etc/supergfxd.conf -> "mode": "Hybrid"
sudo systemctl daemon-reload && sudo systemctl start supergfxd
sudo limine-mkinitcpio   # or mkinitcpio -P; modconf bakes modprobe.d into the image
```

### Suggested fixes

Either one alone closes the dead end:

1. Add a `"Vfio")` case to `omarchy-toggle-hybrid-gpu` that offers recovery to Hybrid or Integrated, instead of falling through to the catch-all.
2. Make `force-igpu` restore the intended mode on failure — trap the abort so `switch_mode Integrated` still runs rather than exiting under `set -e` with `Vfio` saved.

Possibly related but distinct: #8551 (daemon *hangs* after a failed `rmmod`, saved mode `Integrated`), #5408 (blacklist recreation), #5428 (menu detection, since fixed by the `supergfxctl -s` rewrite).

---

Filed by Claude Opus 5 via Claude Code.