Gaming optimizations for the ASRock BC-250 (AMD Ryzen Embedded V2000 / Cyan Skillfish GPU) under Bazzite Linux.
Bazzite is the primary, fully tested target. The script also auto-detects your OS and bootloader (package manager and kernel-arg method — rpm-ostree, GRUB, Limine, systemd-boot or rEFInd), so it runs best-effort on the other BC-250-documented systems too (SteamOS/HoloISO, CachyOS/Arch, Fedora, Debian…). Support outside Bazzite is validated through community reports — please open an issue if something misbehaves on your distro.
Manual replacement for vietsman's image patcher, which is no longer maintained for Bazzite 43+.
curl -sL https://raw.githubusercontent.com/Necrosiak/bc250-tweaks/main/bootstrap.sh | sudo bashThis one command installs everything for a fresh BC-250: the system tweaks plus DeckyLoader and our plugins (BC250-Toolkit, SkullKey, Steamcord). Afterwards, run bc250-status anytime for a one-glance health report (temps, fan, VRAM/UMA, RAM, active tweaks, Proton-GE, plugins).
The script clones this repo to /opt/bc250-tweaks and installs a systemd service that auto-updates on every boot (git pull + apply).
| # | Tweak | File | Description |
|---|---|---|---|
| 1 | Tuned/PPD | /etc/tuned/ppd.conf |
balanced-bazzite at rest → throughput-performance-bazzite in game |
| 2 | Gaming env vars | ~/.config/environment.d/gaming.conf |
RADV_DEBUG=nohiz, RADV_PERFTEST, FSR, Anti-lag, 10 GB shader cache |
| 3 | DRI unified heap | /etc/drirc |
GPU uses system RAM pool — prevents VRAM OOM on large APU games |
| 4 | Pipewire latency | ~/.config/pipewire/pipewire.conf.d/ |
quantum=512, rate=48000 |
| 5 | Sysctl gaming | /etc/sysctl.d/99-bc250-gaming.conf |
compaction=0, numa_balancing=0, tcp_fastopen |
| 6 | Kernel args | auto (rpm-ostree / grubby / GRUB / Limine / systemd-boot / rEFInd) | amdgpu.ppfeaturemask=0xffffffff, amdgpu.gttsize=8000, split_lock_detect=off, transparent_hugepage=madvise |
| 7 | Gamemode | /usr/local/bin/ |
Daemon + libs installed manually (absent from Bazzite base image) |
| 8 | PPD switch | /usr/local/bin/gamemode-{start,end}.sh |
Switches PPD performance↔balanced via busctl on game launch |
| 9 | HHD | /etc/hhd/state.yml |
balanced profile at rest |
| 10 | scx_lavd | /etc/scx_loader/config.toml |
Latency-aware scheduler, loaded by bc250-scx-start — which disarms itself if the previous boot wedged (see below) |
| 11 | MangoHud | ~/.config/MangoHud/MangoHud.conf |
Lightweight overlay, toggle Shift+F12 |
| 12 | vkBasalt CAS | ~/.config/vkBasalt.conf |
Adaptive sharpening, toggle Home |
| 13 | Proton-GE | ~/.steam/steam/compatibilitytools.d/ |
Latest GE-Proton installed |
| 14 | umr sudoers | /etc/sudoers.d/bc250-umr |
NOPASSWD sudo rule for umr (required by BC250-Toolkit plugin CU tab) |
| 15 | CU boot sudoers | /etc/sudoers.d/bc250-cu-boot |
NOPASSWD sudo rules for CU boot persistence (tee, chmod, systemctl) |
| 16 | UMA helper | /usr/local/bin/bc250-uma-helper |
Root helper (NOPASSWD via /etc/sudoers.d/bc250-uma) to read/write the BIOS UMA Frame Buffer EFI variable — used by the BC250-Toolkit plugin VRAM (UMA) section |
| 17 | Input uaccess | /etc/udev/rules.d/70-bc250-input-uaccess.rules |
Grants the active session user read access to keyboard/mouse event nodes (Bazzite only tags joysticks) — needed to bind a physical key while a game has focus, e.g. Steamcord push-to-talk. |
| 18 | Core boot sudoers | /etc/sudoers.d/bc250-core-boot |
NOPASSWD sudo rules letting the Toolkit install the 8C/16T boot service (tee, chmod, systemctl enable/disable) |
scx_lavd gives latency-aware scheduling, but on this board the kernel sometimes evicts it: sched_ext: BPF scheduler "lavd_…" disabled (runnable task stall), with a task reported as not having run for 35 to 45 seconds. The whole interface freezes — systemd services time out at the same instant, so it is the system blocking, not just the display — then scx_loader reloads it and the cycle repeats.
Measured on the reference BC-250 (6C/12T, kernel 7.2.1-ogc2, scx-scheds 1.1.3-3) on 2026-08-30: it happens in --autopower and in --performance. Switching the power mode does not fix it. Observed victims include winedevice.exe, so it can hit during a game too, not only on the desktop.
So the boot service does not guess at versions — it observes. bc250-scx-start counts the evictions from the previous boot and, past two, disarms itself and leaves the kernel scheduler (EEVDF) in place rather than imposing repeated freezes. To try again: sudo rm /var/lib/bc250-scx/disabled and reboot. ./status.sh shows a ↳ blocages scx line whenever the current boot has seen any.
--performance is still used, for a different reason: a mains-powered mining board with no battery has no use for a power profile, and none for core compaction.
MANGOHUD=1 MANGOHUD_CONFIG=no_display ENABLE_VKBASALT=1 gamemoderun %command%
bc250-status also reports, without changing the system, whether a Wi-Fi
adapter, the DualSense kernel driver and connected controllers, an active DRM
display connector, and a CEC bus are available. Optional TV, controller and
wireless features can therefore be gated on actual hardware.
The bc250-tweaks.service runs on every boot:
- Checks network
git pullfrom this repo- Reruns
apply.sh(idempotent — only touches changed files)
# View logs
journalctl -u bc250-tweaks -f
tail -f /var/log/bc250-tweaks.log
# Force update now
sudo /opt/bc250-tweaks/update.sh- GPU: Cyan Skillfish, device ID
731F, vendor1002 - Some games don't recognize this GPU → DXVK spoof:
DXVK_CONFIG="dxgi.customDeviceId=731F dxgi.customVendorId=1002" - TDP: ryzenadj and adjustor not supported on V2000 (Fam17h model 71)
- Kernels to avoid: 6.15.0–6.15.6 and 6.17.8–6.17.10 (broken GPU driver)
- ReBAR/SAM: the Resizable BAR capability is present but caps at 1 GB on the BC-250 (often left at 256 MB) — too small for large DX12 titles. Use the BIOS UMA Frame Buffer instead.
- UE5 DX12 "out of video memory": some Unreal Engine 5 games in DX12 crash at render init even with VRAM free. The global unified heap (tweak #3) helps DXVK/Vulkan games but hides the dedicated VRAM from VKD3D (DX12). Fix: set the BIOS UMA Frame Buffer to Auto (~8 GB on a 16 GB board) and disable the unified heap per-game — the BC250 Toolkit applies this automatically via its
ue5_dx12_oompreset.
- BC250 Toolkit (DeckyLoader plugin) — community game database, apply settings from Steam
- AMD BC-250 Docs — BC-250 Linux community wiki
- bc250.info
We actively work to make these tweaks run on every operating system documented for the BC-250 (community docs) — Bazzite, SteamOS, CachyOS/Arch, Fedora… The goal: automatic OS detection so apply.sh uses the right method (kernel args, packages, services) for your distro.
AI (Claude by Anthropic and Codex by OpenAI) was used in the making of this project — for reverse engineering, development and documentation. It was not used for any art or creative writing. Everything released publicly is reviewed by a human, and the results are my responsibility. If that is not something you are comfortable with, now you know.
If this project is useful to you, you can support its ongoing development on Ko-fi.
