Some laptop vendors provide an additional power-on button which boots
another OS. GRUB supports such buttons with the @samp{GRUB_TIMEOUT_BUTTON},
-@samp{GRUB_TIMEOUT_STYLE_BUTTON}, @samp{GRUB_DEFAULT_BUTTON},
-@samp{GRUB_HIDDEN_TIMEOUT_BUTTON} and @samp{GRUB_BUTTON_CMOS_ADDRESS}
-variables in default/grub (@pxref{Simple configuration}).
-@samp{GRUB_TIMEOUT_BUTTON}, @samp{GRUB_TIMEOUT_STYLE_BUTTON},
-@samp{GRUB_DEFAULT_BUTTON}, and @samp{GRUB_HIDDEN_TIMEOUT_BUTTON} are used
+@samp{GRUB_TIMEOUT_STYLE_BUTTON}, @samp{GRUB_DEFAULT_BUTTON}, and
+@samp{GRUB_BUTTON_CMOS_ADDRESS} variables in default/grub (@pxref{Simple
+configuration}). @samp{GRUB_TIMEOUT_BUTTON},
+@samp{GRUB_TIMEOUT_STYLE_BUTTON}, and @samp{GRUB_DEFAULT_BUTTON} are used
instead of the corresponding variables without the @samp{_BUTTON} suffix
when powered on using the special button. @samp{GRUB_BUTTON_CMOS_ADDRESS}
is vendor-specific and partially model-specific. Values known to the GRUB
or @samp{hidden}, the timeout is instead counted before the menu is
displayed.
-This variable is often set by @samp{GRUB_TIMEOUT} or
-@samp{GRUB_HIDDEN_TIMEOUT} (@pxref{Simple configuration}).
+This variable is often set by @samp{GRUB_TIMEOUT} (@pxref{Simple
+configuration}).
@node timeout_style