The BC-250 enumerates as /sys/class/drm/card0 on a typical install (no
secondary GPU). Verified live on Fedora 43, kernel 7.0.9, PCI 1002:13fe.
Many doc snippets hardcoded card1, so copy-paste failed on a stock single-
GPU board.
Replaced /sys/class/drm/card1/ with /sys/class/drm/card0/ across:
bios/overclocking.md, bios/vram.md, drivers/radv.md,
getting-started/quick-start.md, linux/{arch,bazzite,cachyos,debian,fedora}.md,
reference/quick-reference.md, system/{governor,sensors}.md,
troubleshooting/{boot,display,performance,stability}.md.
Existing card0-vs-card1 disclaimers preserved at governor.md L166/L503,
quick-start.md L78, bazzite.md L104, kernel.md L222 (and quick-reference.md
intro rewritten to lead with card0 + note the iGPU edge case).
Key fixes:
- nct6687 for fan control (not nct6683 which is read-only)
- GPU is card1 not card0 in all sysfs paths
- Fan on pwm2/fan2 (Pump Fan header), not pwm1
- Vulkan 1.4.328 (not 1.3), Mesa 25.3.6 (not 25.2.4)
- cpupower doesn't work on BC-250 (removed recommendations)
- pp_dmu_clock -> pp_dpm_mclk
- ACPI fix marked as optional/experimental (not essential)
- amdgpu.sg_display=0 only needed for kernels < 6.10
- GPU voltage range 700-1129 mV (from OD_RANGE)
- Added CoolerControl installation instructions
- Expanded sensors.md with proper nct6687 setup guide
- display.md: DisplayLink unreliable (latency, no game mode), DP MST max 2 screens
- cooling.md: 3 heatsink variants (QR code = 9-row), thermal pads 1.5mm front/2.0mm back
- distributions.md: Ubuntu 26.04 daily server ISO works out of box
- radv.md: LLM headless mode tip (~14.2GB available VRAM, headless saves ~800MB)
- stability.md: P5.00 BIOS more susceptible to bricking from memory timing;
tREF most rewarding timing, GDDR6 ICs are bottom-binned Micron
- Replace oberon-governor with cyan-skillfish-governor-tt as default across
bazzite, debian, arch, cachyos, fedora, power, quick-reference, display,
performance, radv, and stability pages (oberon remains documented as legacy)
- Add "Black Screen on GPU Reset (Governor Running)" section to
troubleshooting/stability.md (source: Discord user nohanmv, Feb 26)
- Remove AI filler: "comprehensive" from index/sensors, unverifiable stats
(3500+ members, 100+ solutions, 30+ games, 9716/7000+ messages analyzed,
90%/95% success rates)
- Remove unverifiable 8K @60Hz display claim
- Update governor config examples from oberon YAML format to
cyan-skillfish-governor-tt TOML format
- Normalize community links to point to filippor/cyan-skillfish-governor
- Update recommended launch options: nohiz instead of nocompute
- Clarify nocompute is no longer needed on Mesa 25.1+
- Update best practices to reflect current Mesa state
