Closes#810.
## Bug A: HSA_OVERRIDE_GFX_VERSION=11.0.0 was unconditional
PR #804 set HSA_OVERRIDE_GFX_VERSION=11.0.0 for any AMD GPU. The inline comment
claimed this was harmless on supported discrete cards (gfx1030 RX 6800, etc.) — empirically false. With the override, Ollama crashes during GPU discovery on
gfx1030 and falls back to CPU silently. Affects every NOMAD user with an
RX 6800 or other RDNA 2 discrete card.
The correct value depends on the gfx version:
- gfx1030, gfx1100, gfx1101, gfx1102: officially supported by ROCm — no override
- gfx1031..gfx1036 (RDNA 2 variants + iGPUs like Rembrandt 680M): 10.3.0
- gfx1103, gfx1150, gfx1151 (Phoenix 780M, Strix 890M, Strix Halo): 11.0.0
### Resolution chain in `_resolveAmdHsaOverride()`
1. KV `ai.amdHsaOverride` — manual override; accepts 'none' to disable, or a
semver-style value to force.
2. Marker file `/app/storage/.nomad-amd-gfx` — written by install_nomad.sh
based on lspci codename. Mapped to override via `_mapGfxToHsaOverride()`.
3. Default: `11.0.0` — preserves prior behavior so existing iGPU users
(780M / 890M, the dominant AMD population today) don't regress on upgrade.
Discrete RDNA 2 users on existing installs can opt out via
`ai.amdHsaOverride='none'` and force-reinstall AI Assistant, OR re-run
install_nomad.sh to refresh the marker file.
The helper is used in both `createContainer` (initial install) and
`updateContainer` (image update) paths, replacing the unconditional push.
## Bug B: BenchmarkService had no AMD discrete detection path
`BenchmarkService.getHardwareInfo()` had three GPU detection fallbacks:
1. `si.graphics()` — empty inside Docker for AMD
2. nvidia-smi — NVIDIA only
3. AMD APU regex from CPU model — integrated only
Result: AMD discrete cards (RX 6800, RX 7900 XTX, etc.) showed up as
"GPU: Not detected" on the leaderboard despite ROCm working. Corrupts
leaderboard data quality for that population.
Fix: after the existing fallbacks, call `SystemService.getSystemInfo()` and
read `graphics.controllers[0].model`. That path already handles AMD via the
marker file + Ollama log probe added in PR #804, so we're reusing existing
plumbing rather than duplicating detection logic.
## install_nomad.sh changes
The existing AMD detection block already runs lspci. Added a codename parse
step that maps Navi 21/22/23/24, Rembrandt, Phoenix1/Phoenix2, Strix/Strix
Point/Strix Halo, and Navi 31/32/33 to gfx versions, then writes
`/opt/project-nomad/storage/.nomad-amd-gfx`. Unknown codenames write nothing
(admin handles missing-marker case via the backward-compat default).
## Validation
Both bugs were originally surfaced and validated empirically on RX 6800 /
gfx1030 / Ubuntu 24.04 + kernel 6.17 + ollama/ollama:rocm during the #810
filing. Validation grid from that report:
| Run | NOMAD Score | tok/s | GPU detected |
|-----------------------------------------------|-------------|-------|-------------------------|
| Pre-fix (Bug A active) | n/a | 0 | yes, but library=cpu |
| HSA_OVERRIDE removed, Bug B unfixed | 73.8 | 221.6 | "Not detected" |
| Both fixes hot-patched (this PR's behavior) | 73.7 | 216.0 | AMD Radeon RX 6800 |
Local checks: `npm run typecheck` clean, `npm run build` clean.
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