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notebook_launcher raises "Cannot re-initialize CUDA in forked subprocess"

Status: Open.

#3925 In huggingface/accelerate;

· minhtriet opened on Feb 10, 2026

fsdp2 + lora | TypeError: fully_shard() got an unexpected keyword argument 'ignored_params'

Status: Open.

#3923 In huggingface/accelerate;

· garychan22 opened on Feb 9, 2026

<code>save_function</code> arg in <code>save_pretrained</code> is dropped in transformers 5 RCs

Status: Open.

#3913 In huggingface/accelerate;

· khoover opened on Jan 24, 2026

Severe GPU training performance degradation due to incorrectly set <code>KMP_AFFINITY</code>

Status: Open.

#3911 In huggingface/accelerate;

· hexfaker opened on Jan 23, 2026

activation_checkpointing=True uses *a lot* more memory than gradient_checkpointing=True *with FSDP 2.0* (FSDP 1.0 is fine)

Status: Open.

#3897 In huggingface/accelerate;

· d5031 opened on Jan 5, 2026

Why TP can't be used with pure DP?

Status: Open.

#3876 In huggingface/accelerate;

· quic-meetkuma opened on Dec 5, 2025

Feature request: FSDP2 QLoRA

feature requestRequest for a new feature to be added to AccelerateRequest for a new feature to be added to Accelerate

Status: Open.

#3874 In huggingface/accelerate;

· ojh31 opened on Dec 5, 2025

Feature Request: Add API to Materialize Meta Tensors for Device Movement

feature requestRequest for a new feature to be added to AccelerateRequest for a new feature to be added to Accelerate

Status: Open.

#3866 In huggingface/accelerate;

· EricRollei opened on Nov 30, 2025

Deadlock when running multi tasks

bugSomething isn't workingSomething isn't working

good first issueGood for newcomersGood for newcomers

Status: Open.

#3814 In huggingface/accelerate;

· RuizhePang opened on Oct 14, 2025

[Docs] Update low-precision training docs for MS-AMP

documentationImprovements or additions to documentationImprovements or additions to documentation

good first issueGood for newcomersGood for newcomers

Status: Open.

#3639 In huggingface/accelerate;

· shimizust opened on Jun 19, 2025

<code>datasets</code> Iterable Dataset sharding support

feature requestRequest for a new feature to be added to AccelerateRequest for a new feature to be added to Accelerate

Status: Open.

#3547 In huggingface/accelerate;

· ValMystletainn opened on May 5, 2025

RuntimeError: Tensor on device meta is not on the expected device cuda:0!

good first issueGood for newcomersGood for newcomers

Status: Open.

#3542 In huggingface/accelerate;

· nitinmukesh opened on Apr 30, 2025