PR #21518 Release 2.6.1

Adding test for legacy checkpoint created with 2.6.0 (#21388)

92f455be

Fix `_generate_seed_sequence` sampling (#21399)

9660a9da

build(deps): bump mypy from 1.18.2 to 1.19.0 in /requirements (#21394)

061247a1

build(deps): bump click from 8.3.0 to 8.3.1 in /requirements (#21378)

c072cb8e

build(deps): update awscli requirement from <1.43.0,>=1.30.0 to >=1.3…

9766b33d

build(deps): bump actions/checkout from 5 to 6 (#21375)

512e197f

build(deps): bump pytest-doctestplus from 1.5.0 to 1.6.0 in /requirem…

37b38288

fix torch-tensorrt dependency in testing (#21413)

b48c51a7

Deprecate Python 3.9 support (#21398)

1ce288c6

Fix `StochasticWeightAveraging` with infinite epochs (#21396)

9cdd9383

Deprecate method `to_torchscript` (#21397)

bb995ac9

build(deps): update jsonargparse[jsonnet,signatures] requirement from…

78da3ee0

Sanitize profile filename (#21395)

87a3fbb2

build(deps): bump torch & torchvision from 2.8.0 to 2.9.0 in /require…

147b5efc

Fix ddp_notebook CUDA fork check to allow passive initialization (#21…

3d0c1619

ci: revert part of #21413 (#21427)

07ee3282

build(deps): bump actions/cache from 4 to 5 (#21423)

d9fcf9ea

build(deps): bump actions/upload-artifact from 5 to 6 (#21421)

85fe2b3e

build(deps): bump peter-evans/create-pull-request from 7 to 8 (#21422)

c2dfbeeb

build(deps): bump actions/download-artifact from 6 to 7 (#21419)

4987b092

build(deps): update scikit-learn requirement from <1.8.0,>0.22.1 to >…

ff754f6b

build(deps): update ipython[notebook] requirement from <9.8.0 to <9.9…

df90f6eb

build(deps): bump coverage from 7.11.0 to 7.13.0 in /requirements (#2…

2151d43e

build(deps): bump pytest from 8.4.2 to 9.0.2 in /requirements (#21415)

0044b4fe

Fix ModelParallelStrategy fails with non-distributed checkpoint. (#21…

5f061119

build(deps): update nbsphinx requirement from <=0.9.7,>=0.8.5 to >=0.…

7668e0c8

Improve RichProgreasBar speed performance (#21321)

a6dd84b6

Adds litlogger integration (#21430)

324aca5e

Remove duplicate 'Why PyTorch Lightning?' section

f4ded477

Revise README for clarity on model serving and training

380d425f

build(deps): update fsspec[http] requirement from <2025.11.0,>=2022.5…

90d1e8e0

build(deps): bump torch from 2.9.0 to 2.9.1 in /requirements (#21439)

e673df57

build(deps): update awscli requirement from <1.44.0,>=1.30.0 to >=1.3…

db3f8de6

build(deps): bump sphinx-toolbox from 4.0.0 to 4.1.0 in /requirements…

1f174e14

build(deps): update onnx requirement from <1.20.0,>1.12.0 to >1.12.0,…

439b93f5

build(deps): update docutils requirement from <=0.22.3,>=0.18.1 to >=…

ea2135ce

build(deps): bump coverage from 7.13.0 to 7.13.1 in /requirements (#2…

a476a0e5

[pre-commit.ci] pre-commit suggestions (#21471)

9fe1477b

fix changelog format (#21460)

d1c249f8

fix: fix typo in logging_advanced.rst (#21468)

6921dfba

build(deps): bump mypy from 1.19.0 to 1.19.1 in /requirements (#21444)

4d5e8efc

Add Python 3.13 to CI (#21360)

8fdd13ac

build(deps): update psutil requirement from <7.2.0 to <7.3.0 in /requ…

9d3a9b85

build(deps): update fsspec[http] requirement from <2025.13.0,>=2022.5…

2b8b98ea

build(deps): bump pytest-doctestplus from 1.6.0 to 1.7.0 in /requirem…

4ca4cdff

build(deps): bump sphinx-toolbox from 4.1.0 to 4.1.1 in /requirements…

9627e2f6

build(deps): update ipython[notebook] requirement from <9.9.0 to <9.1…

7fa75611

build(deps): update jsonargparse[jsonnet,signatures] requirement from…

bb2af050

Expose `weights_only` argument for loading checkpoints in `Fabric.loa…

3735ea75

Fix LightningDataModule.load_from_checkpoint to restore subclass and …

5bd118f0

Enable windows in unittest `test_fetching_is_profiled` (#21479)

e2330b48

Adds method chaining support to `LightningModule.freeze()` and `Light…

45a46ef4

build(deps): update numpy requirement from <2.3.5,>2.1.0 to >2.1.0,<2…

9c8c26c6

Fix warning frequency in throughput monitor callback (#21453)

db58ae02

fix(fabric): forward set_epoch to underlying sampler in DistributedSa…

dc71a7d4

fix(link-check): resolve broken URLs (#21493)

6179c9b7

CI: fix doctest failure from PyTorch LeafSpec FutureWarning (#21502)

590c3177

Fix `save_hyperparameters` ignore precedence in subclasses (#21490)

951aedc4

build(deps): update torchvision requirement from <0.25.0,>=0.16.0 to …

bfba9533

build(deps): update setuptools requirement from <80.9.1 to <80.10.3 i…

db6c81e4