I just encountered the issue that the parameter GRUB_TIMEOUT in
/etc/default/grub does not reduce the timeout for uefi boot anymore. I
was able to pinpoint the issue in the grub config to line 98 [1]. From
your issue here I understand that this is the way it is supposed to
work.
This should be documented somewhere as the documentation does not
mention that this setting does not work for uefi boot [2].
As a workaround you could edit /etc/grub.d/00_header to check in line
387 if the timeout is less than 5 [3].
[1]
/etc/default/grub ~
GRUB_TIMEOUT=5
/boot/grub/grub.cfg:98 ~
if [ $grub_platform = efi ]; then
set timeout=30 # this value is the issue
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
fi
fi
[2]
info -f grub -n 'Simple configuration' ~
'GRUB_TIMEOUT'
Boot the default entry this many seconds after the menu is
displayed, unless a key is pressed. The default is '5'. Set to
'0' to boot immediately without displaying the menu, or to '-1' to
wait indefinitely.
[3]
/etc/grub.d/00_header:387 ~
- set timeout=${GRUB_RECORDFAIL_TIMEOUT:-30}
+ set timeout=${$(if (( $GRUB_TIMEOUT < 5 )); then echo "5"; else echo
"$GRUB_TIMEOUT"; fi):-30}
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https://bugs.launchpad.net/bugs/1814403
Title:
Latest update causes 30 sec. menu delay timeout
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