The recent Turris OS update from 7.2.3 to 9.0.0 took down my WiFi entirely. The wired network still works fine, but wireless is completely broken. ## Factory reset It turns out the Omnia has an extensive (and fast) factory reset / recovery mode via the hardware reset button. Unfortunately, the factory image didn't work for me, possibly because I don't use the stock WiFi radios anymore. ## Rolling back with schnapps Thanks to the fact that the Omnia uses a btrfs root filesystem, and the liberal use of snapshots around updates, I was able to rollback to the pre-9.0.0 state. First, I connected to the router using ssh: ssh root@192.168.1.1 Then I listed the available snapshots: $ schnapps list # | Type | Size | Date | Description ------+-----------+-------------+-----------------------------+------------------------------------ 500 | post | 15.98MiB | 2025-08-09 11:27:48 -0700 | Automatic post-update snapshot (TurrisOS 7.2.2 - hbs) 506 | pre | 17.92MiB | 2025-09-12 03:44:32 -0700 | Automatic pre-update snapshot (TurrisOS 7.2.2 - hbs) 507 | post | 17.88MiB | 2025-09-12 03:45:14 -0700 | Automatic post-update snapshot (TurrisOS 7.2.3 - hbs) 515 | time | 20.03MiB | 2025-11-02 01:05:01 -0700 | Snapshot created by cron 516 | time | 20.05MiB | 2025-11-09 01:05:01 -0800 | Snapshot created by cron 517 | time | 20.29MiB | 2025-11-16 01:05:00 -0800 | Snapshot created by cron 518 | time | 20.64MiB | 2025-11-23 01:05:01 -0800 | Snapshot created by cron 519 | time | 20.83MiB | 2025-11-30 01:05:00 -0800 | Snapshot created by cron 520 | pre | 87.91MiB | 2025-11-30 07:41:10 -0800 | Automatic pre-update snapshot (TurrisOS 7.2.3 - hbs) 521 | post | 196.32MiB | 2025-11-30 07:48:11 -0800 | Automatic post-update snapshot (TurrisOS 9.0.0 - hbs) 523 | pre | 4.44MiB | 2025-11-30 20:47:31 -0800 | Automatic pre-update snapshot 524 | post | 224.00KiB | 2025-11-30 20:47:43 -0800 | Automatic post-update snapshot 525 | rollback | 224.00KiB | 2025-12-01 04:56:32 +0000 | Rollback to snapshot factory 526 | pre | 4.44MiB | 2025-11-30 21:04:19 -0800 | Automatic pre-update snapshot 527 | post | 272.00KiB | 2025-11-30 21:04:31 -0800 | Automatic post-update snapshot 528 | rollback | 272.00KiB | 2025-12-01 05:13:38 +0000 | Rollback to snapshot factory 529 | pre | 4.52MiB | 2025-11-30 21:28:44 -0800 | Automatic pre-update snapshot 530 | single | 208.00KiB | | 531 | rollback | 224.00KiB | 2025-12-01 05:29:47 +0000 | Rollback to snapshot factory Finally, I rolled back to the exact state I was on before the 9.0.0 update: $ schnapps rollback 520 Current state saved as snapshot number 532 Rolled back to snapshot 520 ## Full wipe As an aside, it turns out that the factory reset functionality is implemented as a brtfs rollback to a special _factory_ snapshot. This is why is so fast, but it also means that **doing a simple factory reset doesn't wipe the data on your router**. If you are planning to sell your device or otherwise dispose of it, you also need to **delete all btrfs snapshots** ## Conclusion While this update was very disappointing, especially since it's never happened before with major updates on Turris OS, it made me discover just how great the recovery tools are. It would be pretty tricky to fully brick one of these devices.