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SkiffOS on Steam Deck

Screenshot

The configuration package valve/deck is for the Steam Deck by Valve.

Reference:

Getting Started

Set the comma-separated SKIFF_CONFIG variable:

$ export SKIFF_CONFIG=valve/deck,skiff/core
$ make configure                   # configure the system
$ make compile                     # build the system

Once the build is complete, we will flash to a MicroSD card to boot. You will need to sudo bash for this on most systems.

$ sudo bash             # switch to root
$ export INTEL_DESKTOP_DISK=/dev/sdz # make sure this is right! (usually sdb)
$ make cmd/intel/desktop/format  # tell skiff to format the device
$ make cmd/intel/desktop/install # tell skiff to install the os

You only need to run the format step once. It will create the partition table. The install step will overwrite the current Skiff installation on the card, taking care to not touch any persistent data (from the persist partition). It's safe to upgrade Skiff independently from your persistent data.

Boot Process

To access the boot menu, power on the device while holding volume-down.

Use the d-pad to select "Boot menu."

Select the "EFI SD Card" to boot from the MicroSD.

Startup

You can connect to the deck via SSH, see the SkiffOS readme for more info.

Overwriting SteamOS on NVME Drive

NOTE: these instructions may cause issues, proceed at your own risk!

You can install SkiffOS on the NVME drive once you have booted to the SD card.

  1. Boot SkiffOS on the SD card and ssh in.
  2. Enter the parted prompt with parted /dev/nvme0n1
  3. Wipe the drive with mklabel gpt.
  4. mkpart primary fat32 1049kB 538MB
  5. name 1 EFI
  6. set 1 boot on
  7. mkpart primary ext4 538MB "100%"
  8. name 2 SKIFFOS
  9. Type quit and press enter to exit parted.
  10. partprobe /dev/nvme0n1
  11. mkfs.vfat -n EFI -F 32 /dev/nvme0n1p1
  12. mkfs.ext4 -F -L "SKIFFOS" /dev/nvme0n1p2
  13. mkdir -p /mnt/nvme/efi /mnt/nvme/persist /mnt/efi
  14. mount /dev/mmcblk0p1 /mnt/efi
  15. mount /dev/nvme0n1p1 /mnt/nvme/efi
  16. mount /dev/nvme0n1p2 /mnt/nvme/persist
  17. rsync -rav /mnt/efi/ /mnt/nvme/efi/
  18. rsync -rav /mnt/persist/boot/ /mnt/nvme/persist/boot/
  19. Edit /mnt/nvme/persist/boot/refind_linux.conf and change root=PARTUUID=... to root=/dev/nvme0n1p2
  20. sync
  21. reboot

After rebooting, the system will reboot into SkiffOS from the NVME drive.

Formatting the SD card

You can format the SD card as storage after connecting to your Deck:

  1. Boot SkiffOS on the Steam Deck with the SD card removed.
  2. SSH to the deck.
  3. Insert the SD card.
  4. Enter the parted prompt with parted /dev/mmcblk0
  5. Wipe the SD card with mklabel gpt
  6. mkpart primary ext4 0% 100%
  7. name 1 STORAGE
  8. Type quit and press enter to exit parted.
  9. partprobe /dev/mmcblk0
  10. mkfs.ext4 -F -L "STORAGE" /dev/mmcblk0p1

The MicroSD card can then be mounted: mkdir -p /mnt/sd && mount /dev/mmcblk0p1 /mnt/sd