[Bug 1178618] Re: --hotkey option does not work when the menu is hidden

[Bin Li]

I verified this issue.
First I change the /etc/grub.d/20_memtest86+ like below.

-menuentry "Memory test (memtest86+)" {
+menuentry "Memory test (memtest86+)" --hotkey f9{

After update-grub and reboot, F9 could work.

Next, I change the /etc/default/grub, I added 'GRUB_TIMEOUT_STYLE=hidden'
After update-grub and reboot, F9 could work.

Next, I change the /etc/default/grub like below.
-GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT=10
After update-grub and reboot, F9 could work.

So, I thought this issue should be fixed.

** Tags removed: verification-needed
** Tags added: verification-done

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https://bugs.launchpad.net/bugs/1178618

Title:
  --hotkey option does not work when the menu is hidden

Status in GRand Unified Bootloader:
  New
Status in OEM Priority Project:
  Confirmed
Status in OEM Priority Project precise series:
  Confirmed
Status in “grub2” package in Ubuntu:
  Fix Released
Status in “grub2” source package in Precise:
  Fix Committed

Bug description:
  
  Grub2 can detect key modifier status in 'sleep --interruptible', 
  so that you can interrupt the sleep by pressing Shift.
  (src: grub-core/commands/sleep.c)

  It will be useful if grub2 can also detect function key status,
  so user can boot to pre-defined grub menu entry by press specified
  function key.

  Here is a proposed command name and usage.

  - getfunctionkey -i {sec} {keyname}

  Here is an example of configuration that user can start memory test
  whiling he is pressing F9.

  ```
  if ! getfunctionkey -i 3 f9 ; then
  menuentry "Memory test (memtest86+)" {                                                                                                                                                                           
          insmod part_msdos
          insmod ext2
          set root='(hd0,msdos1)'
          search --no-floppy --fs-uuid --set=root d458babc-81f0-4dd7-ac88-410407141e2c
          linux16 /boot/memtest86+.bin
  }
  fi
  ```

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