Question: I have few Major modes (like: Yaml and NXML) that I don't want electric-indent-mode (I want it for C like languages) but I'm unable to turn if off. To enable I have:

```
(electric-indent-mode 1)

```

from documentation (for variable electric-indent-mode)

> 
> Non-nil if Electric-Indent mode is enabled.
>  See the command `electric-indent-mode' for a description of this minor mode.
>  Setting this variable directly does not take effect;
>  either customize it (see the info node`Easy Customization')
>  or call the function `electric-indent-mode'.
> 
> 
> 

and for a function

> 
> Toggle on-the-fly reindentation (Electric Indent mode). With a prefix
>  argument ARG, enable Electric Indent mode if ARG is positive, and
>  disable it otherwise. If called from Lisp, enable the mode if ARG is
>  omitted or nil.
> 
> 
> 

so I try to turn it off in a hook:

```
(add-hook 'yaml-mode-hook (lambda ()                        
                             (electric-indent-mode -1)))

```

(Actualy I use after-change-major-mode-hook and check `(memql major-mode '(yaml-mode python-mode nxml-mode))` where I can add more modes to the list).

But it don't work, I've also try:

```
(set (make-local-variable 'electric-indent-mode) nil)

```

No joy. But it work when I eval `(electric-indent-mode -1)` from .emacs files.

Answer: 
With a recent Emacs (probably Emacs snapshot only) you can use `electric-indent-local-mode`, e.g.:

```
(add-hook 'yaml-mode-hook (lambda () (electric-indent-local-mode -1)))

```

If your Emacs lacks this function, you can still sort of disable the mode via `electric-indent-functions`, e.g.

```
(add-hook 'yaml-mode-hook
          (lambda ()
             (add-hook 'electric-indent-functions
                            (lambda () 'no-indent) nil 'local)))

```

And in either case, you may probably want to restore `C-j`, via

```
(add-hook 'yaml-mode-hook 
          (lambda () (local-set-key (kbd "C-j") #'newline-and-indent)))

```
At least on emacs 24.3 you cannot disable electric indent mode locally, since it is a `global-mode`. Anyways the issue with `yaml-mode` is that the `electric-indent` functionality is built into it i.e. it will be enabled even without `electric-indent-mode`. The package does not provide a way to turn this behaviour off, maybe you should file an issue on its github repo.

Try this to disable the electric-indent functionality in `yaml-mode`

```
(define-key yaml-mode-map "|" nil)
(define-key yaml-mode-map ">" nil)
(define-key yaml-mode-map "-" nil)
(define-key yaml-mode-map "." nil)
(define-key yaml-mode-map [backspace] nil)

```

To restore the electric-indent behaviour afterwards, you can do

```
(define-key yaml-mode-map "|" 'yaml-electric-bar-and-angle)
(define-key yaml-mode-map ">" 'yaml-electric-bar-and-angle)
(define-key yaml-mode-map "-" 'yaml-electric-dash-and-dot)
(define-key yaml-mode-map "." 'yaml-electric-dash-and-dot)
(define-key yaml-mode-map [backspace] 'yaml-electric-backspace)

```