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[executorch][vulkan] Accept 1-D activations in 8da4w linear - #24544

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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #24369 by @digantdesai
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/digantdesai/196/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/digantdesai/196/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/gh/digantdesai/195/orig
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/digantdesai/196/orig

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cc @SS-JIA @manuelcandales @digantdesai @cbilgin

Pull Request resolved: #24369

`linear_dq8ca_q4gsw` failed on rank-1 activations: `is_2d_matrix` rejected them, and `get_quantized_input_num_blocks` read the size at `ndim - 2`. Both now treat a 1-D tensor as a single row.

Authored with Claude Code.

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ghstack-source-id: 463657751
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Differential Revision: [D128254882](https://our.internmc.facebook.com/intern/diff/D128254882/)
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pytorchbot requested a review from SS-JIA as a code owner November 3, 2026 21:27
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🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/24544

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@pytorch-bot pytorch-bot Bot added the module: vulkan Issues related to the Vulkan delegate and code under backends/vulkan/ label Nov 3, 2026
@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Nov 3, 2026

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cadence — 5e5fbb0f Deployed Nov 3, 2026 by pytorchbot via hifi-op-test / hifi4 #36375
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