theupriser/steamify-cachyos-live-iso
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  • v2.12.0-261014 146f1f0c7c
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    CachyOS 26.08 with Steamify 2.12.0 (2026.10.14 UTC)
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    theupriser released this 2026-10-14 12:44:18 +02:00 | 0 commits to master since this release

    CachyOS 26.08 with Steamify 2.12.0 built in. Install CachyOS and turn the PC into a Steam Machine in one go.

    The ISO is built from 146f1f0 (master). It is about 3 GB, more than a GitHub release can hold (2 GB per file), so it is published on the mirror about 20 minutes after this release is created:

    Download: steamify-cachyos-2.12.0-261014-x86_64.iso (SHA-256, release page)

    Steamify 2.12.0

    • feat: setting up the SteamOS conversion on NVIDIA first checks that nothing blocks it (a pacman lock, less than 1.5 GB free), and a failed setup is remembered: a desktop notification now and a reminder in the menu until a setup works

    • docs: the README and TECHNICAL.md describe NVIDIA as it is now (the SteamOS conversion with the patched gamescope; "Gaming on NVIDIA" only as history); the NVIDIA menu screenshot is gone, NVIDIA PCs get the same menu

    • feat: the patched gamescope comes in one build per CPU level, like CachyOS's repositories (generic, x86-64-v3, v4, znver4): Steamify picks the best one this CPU can run (gsn_cpu_variant), falls back to generic, and starts the installed gamescope once headless (gsn_smoke_test): a build that doesn't start is replaced by the generic one. CI compiles each with an explicit -march (a -march=native build died with SIGILL on a Ryzen) and checks the binary for instructions beyond its level.

    • feat: on NVIDIA the gaming session runs on the display's own mode and Steam's interface at its size: a second gamescope patch (gamescope-ui-native.patch, release 3.16.31-3 of steamify-gamescope-nvidia, now the pin; built once per CPU level, see below) keeps Steam's UI X server at the output size when Steam (with -steamos3) asks for 1920x1080, and a wrapper (gamescope-display-wrapper.sh, set up by the conversion with a drop-in of gamescope-session.service) starts gamescope on the mode KDE has saved for the connected display, else the biggest mode at the highest refresh rate: before, gaming mode ran at the display's preferred mode (60 Hz on many monitors) with a 1080p Steam UI. Tested on an RTX 5080, 3440x1440@175: widescreen, sharp, a Proton game starts

    • fix: on an NVIDIA PC that had single user mode on before the SteamOS conversion, "Return to Gaming Mode" and the boot choice work again: single user mode's desktop autologin (zzz-steamify-autologin.conf, read last) pinned the Plasma session; the conversion removes it, and turning the conversion off sets it up again

    • fix: when an option fails, its sub-options are not applied any more (a failed conversion used to leave its "Boot into the desktop", silent start and icons on without it)

    • fix: a PC that keeps python-hidapi (liquidctl needs it) can use the SteamOS conversion: jupiter-hw-support, which gamescope-session-cachyos depends on, wants python-hid, which conflicts with it and stopped the package install. Steamify builds and installs an empty placeholder package that provides python-hid first (patches/python-hid-shim.PKGBUILD); only the Steam Deck controller firmware updater uses it

    • feat: the patched gamescope is downloaded as the newest release of steamify-gamescope-nvidia (checked against that release's .sha256), a newer one than the installed package shows the SteamOS conversion as an update, and what this Steamify was tested with is the fallback: the pinned package (sha256 in Steamify), the copy the ISO leaves, a build here; the repository's workflow builds each release in CachyOS's container

    • 124b424, f234c72 fix: HDMI-CEC on the Steam Machine no longer needs GitHub: when downloading Valve's CEC driver fails, Steamify uses the copy it carries (patches/cros-ec-cec.c), checked against the same pinned sha256

    • 127b8cf, 2811ecc, f3cd053, 4325d80, 03f9e87, 5b5181f, 06ffc8b, 4d60dd2, 0ba94b2 feat: the SteamOS conversion is offered on NVIDIA PCs again (GTX 16 / RTX 20 series or newer: Turing and later, the cards NVIDIA's open kernel driver supports): it builds and installs a patched gamescope from the recipe and patch Steamify carries (patches/, prepared in steamify-gamescope-nvidia; gamescope 3.16.31, so a Steamify release builds the version it was tested with) (GBM-allocated scan-out buffers, NVIDIA's corrupted gaming-mode picture, gamescope#2309; a few minutes to build) and sets gamescope_drm_gbm_scanout=1 for the session (lib/gamescope-nvidia.sh). It replaces "Gaming on NVIDIA", which is not offered any more (the kernel parameters, early modules, suspend memory and the 32-bit libraries come with the conversion on a supported card; a PC that had "Gaming on NVIDIA" on has it turned off when the conversion is turned on). Tested on an RTX 5080 (driver 615.78.08): Steam's gaming UI is clean with it and shows artifacts without. The package is pinned to one gamescope release: updating it is not automatic yet

    • ce4bc67 feat: "Gaming on NVIDIA" also keeps video memory over suspend (NVreg_PreserveVideoMemoryAllocations=1 in /etc/modprobe.d/90-steamify-nvidia.conf, the initramfs is rebuilt), enables nvidia-suspend/nvidia-resume/nvidia-hibernate, and installs lib32-nvidia-utils and lib32-libxkbcommon (32-bit games, the 32-bit MangoHud preload) on a supported card; off removes only what Steamify added. Untested on hardware yet

    Changes in this ISO

    Since v2.11.1-261002:

    • steamify-install: the fallback selection includes HDMI-CEC and the Steam Machine items only on a Steam Machine
    • Replace nvidia-module-loader with cachyos-drm-awaiter

    Sources

    Steamify, this repository at this tag, and the packages' sources at CachyOS and Arch Linux.

    Checksum

    SHA-256 of the ISO: 19e5087d2df62cdac72d5fa3bd4df39736b3bbb3db62bccba1a99b085a322311 (label STEAMIFY_2_12_0_261014).

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