[25.05] Alt+Arrow suddenly changes TTY
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Description
It appears to me that since nixos-25.05, the key combination(s) Alt+Arrow key changes the TTY.
And indeed, my keymaps (de) show that:
$ sudo dumpkeys | grep cr_Console
alt keycode 105 = Decr_Console
alt keycode 106 = Incr_Console
But why? This seems to have changed since 24.11 and there's AFAICS no documentation about this (breaking) change in the changelog. And especially there's no documentation how to revert to the old behaviour (simple don't do that... Ctrl+Alt+F1.. is sufficient 😆 )
Pinging some people that have contributed to nixos/modules/config/console.nix: @K900 @msanft because I don't know who would be the right one here.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Read nixos/modules/config/console.nix and reproduce the Alt+Arrow mappings with dumpkeys, comparing the behavior between NixOS 24.11 and 25.05. Done means determining why Decr_Console and Incr_Console are assigned and either restoring the previous behavior or documenting how to disable it.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- linux
- Domain
- operating-systems
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 58/100