Public bug reported:
# What is happening
When `GRUB_TIMEOUT=1` is set in `/etc/default/grub` and `update-grub` is run,
the desired grub boot menu timeout of 1 second is not acknowledged.
This is on an EFI system.
The following is the relevant snippet of `/boot/grub/grub.cfg`:
```
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=hidden
set timeout=1
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep --interruptible 1 ; then
set timeout=0
fi
fi
if [ $grub_platform = efi ]; then
set timeout=30
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
fi
fi
```
The issue here is that on an EFI system, the `timeout` is overridden by
the later test to 30 seconds.
# What is expected
I expect that when I set `GRUB_TIMEOUT=1` in `/etc/default/grub` that the grub
menu will timeout (continue to boot) in 1 second.
# Workaround
The EFI timeout is taken from `GRUB_HIDDEN_TIMEOUT_QUIET` in
`/etc/grub.d/00_header`. Adding `GRUB_HIDDEN_TIMEOUT_QUIET=1` solves the
problem, but is the wrong approach.
# Possible solutions
As a user I do not see why on an EFI system there should be a separate timeout,
or indeed that the timeout should even depend on the system type. i.e As a user
I don't care.
Looking at the generated grub config I would expect that the generated output
would be:
```
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=hidden
set timeout=1
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep --interruptible 1 ; then
set timeout=0
fi
fi
if [ $grub_platform = efi ]; then
set timeout=1
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
fi
fi
```
but am confused as to why the EFI detection is in a separate `if...`
Clearly the code in `/etc/grub.d/00_header` should be changed from:
```
413 if [ \$grub_platform = efi ]; then
414 set timeout=${GRUB_RECORDFAIL_TIMEOUT:-30}
415 if [ x\$feature_timeout_style = xy ] ; then
416 set timeout_style=menu
417 fi
418 fi
```
to
```
413 if [ \$grub_platform = efi ]; then
414 set timeout=${GRUB_TIMEOUT:-30}
415 if [ x\$feature_timeout_style = xy ] ; then
416 set timeout_style=menu
417 fi
418 fi
```
# Additional information
Ubunutu version:
```
lsb_release -r
Release: 20.10
```
Package version
```
dpkg -l grub2-common
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-================-============-=====================================================
ii grub2-common 2.04-1ubuntu35.4 amd64 GRand Unified Bootloader
(common files for version 2)
```
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1918736
Title:
update-grub uses the wrong timout for efi system
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