Changes in `2.5.5`

PyTorch Lightning

Changed

Include exclude_frozen_parameters to DeepSpeedStrategy (#21060)
Include PossibleUserWarning that is raised if modules are in eval mode when training starts (#21146)

Fixed

Fixed LightningCLI not using ckpt_path hyperparameters to instantiate classes (#21116)
Fixed callbacks by defer step/time-triggered ModelCheckpoint saves until validation metrics are available (#21106)
Fixed with adding a missing device id for pytorch 2.8 (#21105)
Fixed TQDMProgressBar not resetting correctly when using both a finite and iterable dataloader (#21147)
Fixed cleanup of temporary files from Tuner on crashes (#21162)

Lightning Fabric

Changed

Include exclude_frozen_parameters to DeepSpeedStrategy (#21060)
Let _get_default_process_group_backend_for_device support more hardware platforms (
#21057, #21093)

Fixed

Fixed with adding a missing device id for pytorch 2.8 (#21105)
Respecting verbose=False in seed_everything when no seed is provided (#21161)

Full commit list: 2.5.4 -> 2.5.5

Contributors

We thank all folks who submitted issues, features, fixes and doc changes. It's the only way we can collectively make Lightning ⚡ better for everyone, nice job!

In particular, we would like to thank the authors of the pull-requests above, in no particular order:

@Borda, @KAVYANSHTYAGI, @littlebullGit, @mauvilsa, @SkafteNicki, @taozhiwei

Thank you ❤️ and we hope you'll keep them coming!

Lightning-AI/pytorch-lightning 2.5.5 Lightning v2.5.5 on GitHub

Changes in 2.5.5

PyTorch Lightning

Lightning Fabric

Contributors

Lightning-AI/pytorch-lightning 2.5.5
Lightning v2.5.5

on GitHub

Changes in `2.5.5`