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docs: comprehensive update — kernel, cooling, pinouts, mesa, governors, distros

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docs/drivers/environment.md
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@@ -4,21 +4,32 @@ This guide covers all environment variables for BC-250 graphics configuration, p
## Critical Environment Variables
!!!warning "IMPORTANT: RADV_DEBUG is an ENVIRONMENT VARIABLE, NOT a kernel argument"
Do NOT add it to kernel parameters (grub, /etc/default/grub, etc.).
Set RADV_DEBUG only via:
- Steam launch options: `RADV_DEBUG=nohiz %command%`
- Shell: `export RADV_DEBUG=nohiz` before launching
- /etc/environment (system-wide)
- Per-application wrappers
### RADV_DEBUG=nocompute
**Status:** Required for most games (Mesa < 25.1)
**Status:** DEPRECATED on Mesa 25.1+
The most important environment variable for BC-250 gaming. Forces games to use the graphics queue instead of the broken compute queue.
The compute queue issue is resolved upstream. Only use if running Mesa 25.0 or earlier.
**What it does:**
The BC-250's compute queue has hardware issues that cause graphical artifacts and rendering problems. This variable forces all workloads through the graphics queue instead.
For Mesa 25.1 and newer, use RADV_DEBUG=nohiz instead for Game Mode stability.
**What it did:**
The BC-250's compute queue had hardware issues that caused graphical artifacts and rendering problems. This variable forced all workloads through the graphics queue instead.
**When to use:**
- Always set for gaming on Mesa versions before 25.1
- May not be needed on Mesa 25.1+ due to [MR #33116](https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33116) which disables the compute-only queue by default
- Only needed on Mesa 25.0 or earlier
- **Not needed on Mesa 25.1+** - compute queue issue is fixed
**How to set:**
**How to set (if needed for old Mesa):**
```bash
# Steam launch options

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docs/drivers/radv.md
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@@ -38,13 +38,13 @@ The BC-250 **only works on Linux** for gaming and desktop use. There is no Windo
BC-250 support was added upstream in Mesa 25.1.0. **Do not use older versions** - they will not work properly or at all.
### Recommended: Mesa 25.1.3+
### Recommended: Mesa 25.2.4+
For stability and performance, use Mesa 25.1.3 or newer:
For stability and performance, use Mesa 25.2.4 or newer:
- **25.1.0** - Initial BC-250 support
- **25.1.3** - Improved stability
- **25.1.5+** - Best tested version, recommended
- **25.1.3+** - Minimum recommended
- **25.2.4** - Confirmed working (Bazzite Feb 2026), current stable target
### What Changed in Mesa 25.1?