Re: Why has X11 system clipboard interoperability changed from Emacs 24 to 25?

[Glenn Morris <rgm@gnu.org>]

itchybeard wrote:

> In the Emacs 24 GUI for X11-based desktops I can set
> `'(x-select-enable-clipboard nil)` in my config to prevent standard
> kill ring commands like `yank`, `kill-region`, and `kill-ring-save`
> from affecting the X11 system clipboard, and it still allows me to
> explicitly interoperate with that clipboard by invoking the commands
> `clipboard-yank`, `clipboard-kill-region`, and
> `clipboard-kill-ring-save`.
>
> But in Emacs 25 the variable `x-select-enable-clipboard` is replaced
> by `select-enable-clipboard` which when set to `nil` in my config
> yields different results: *all* interoperability with the X11 system
> clipboard is disabled. Even the commands `clipboard-yank`,
> `clipboard-kill-region`, and `clipboard-kill-ring-save` revert to
> using Emacs' kill ring exclusively, in fact they have identical
> effects to using plain `yank`, `kill-region`, and `kill-ring-save`, so
> what's their purpose when `select-enable-clipboard` is set to `nil`?

You did not say exactly what version of Emacs you are using.
If 25.1, this sounds like https://debbugs.gnu.org/25145, fixed in 25.2.