# NousResearch/hermes-agent · Linux NVIDIA backend falls back to Vulkan, not CUDA

## Open now

- Nothing open on GitHub.

These items address a situation where Linux with NVIDIA hardware selects CUDA but no prebuilt CUDA assets exist, causing automatic backend selection to fail. The fix redirects Linux NVIDIA to use Vulkan instead.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 0 merged PR(s), 2 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Closed / duplicate issues

- #103949: local_runtime: select_backend() returns 'cuda' on Linux+NVIDIA but no Linux CUDA prebuilt exists — auto backend fails unconditionally

## Prior & competing PRs

- **#102571: fix(cli): local-model setup falls back to vulkan when Linux CUDA has no prebuilt**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `bdb52ce711731290a494cee3c8b4d633dff33239`
- **#104755: fix(local-runtime): select vulkan for NVIDIA on Linux due to absence of prebuilt CUDA assets (#103949)**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `bdb52ce711731290a494cee3c8b4d633dff33239`

## Fix status

- No merged fix on record.