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chore: prepare changelog for 2.6.4 release #21729

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justusschock merged 1 commit into from
May 20, 2026
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chore: prepare changelog for 2.6.4 release #21729

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7 changes: 4 additions & 3 deletions src/lightning/fabric/CHANGELOG.md
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Expand Up @@ -22,14 +22,15 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).

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## [2.6.4] - 2026-05-20

## [2.6.2] - 2026-03-19
> Versions 2.6.2 and 2.6.3 were skipped due to a supply chain security compromise. See [#21691](https://github.com/Lightning-AI/pytorch-lightning/issues/21691) for details.

### Fixed

- Fixed FSDP mixed precision (`bf16-mixed`, `16-mixed`) initializing model parameters in half precision instead of fp32 ([#21586](https://github.com/Lightning-AI/pytorch-lightning/pull/21586))

- Fixed `device_mesh` type hint in `FSDPStrategy` to accept a 2-element tuple via the CLI ([#21581](https://github.com/Lightning-AI/pytorch-lightning/pull/21581))

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12 changes: 4 additions & 8 deletions src/lightning/pytorch/CHANGELOG.md
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Expand Up @@ -28,30 +28,26 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).

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## [2.6.2] - 2026-03-19
## [2.6.4] - 2026-05-20

> Versions 2.6.2 and 2.6.3 were skipped due to a supply chain security compromise. See [#21691](https://github.com/Lightning-AI/pytorch-lightning/issues/21691) for details.

### Removed

- Removed support for Neptune logger ([#21572](https://github.com/Lightning-AI/pytorch-lightning/pull/21572))


### Changed

- Raise minimum `LitLogger` version to `2026-03-17` ([#21591](https://github.com/Lightning-AI/pytorch-lightning/pull/21591))


### Fixed

- Fixed `val_check_interval` raising `ValueError` when `limit_val_batches=0` and interval exceeds training batches ([#21560](https://github.com/Lightning-AI/pytorch-lightning/pull/21560))

- Fixed pkg-resources deprecation issue ([#21538](https://github.com/Lightning-AI/pytorch-lightning/pull/21538))

- Fixed FSDP mixed precision (`bf16-mixed`, `16-mixed`) initializing model parameters in half precision instead of fp32 ([#21586](https://github.com/Lightning-AI/pytorch-lightning/pull/21586))

- Fixed `device_mesh` type hint in `FSDPStrategy` to accept a 2-element tuple via the CLI ([#21581](https://github.com/Lightning-AI/pytorch-lightning/pull/21581))

- Fixed ``RichModelSummary`` model size display formatting ([#21467](https://github.com/Lightning-AI/pytorch-lightning/pull/21467))
- Fixed `RichModelSummary` model size display formatting ([#21467](https://github.com/Lightning-AI/pytorch-lightning/pull/21467))
- Fixed floating-point precision in `SimpleProfiler` duration aggregation by using `math.fsum` ([#21525](https://github.com/Lightning-AI/pytorch-lightning/pull/21525))

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