Public bug reported:
[Impact]
On some HP laptops, BIOS hotkeys don't work right after reboot, becuase
OS doesn't call _PTS to indicate ACPI it's rebooting.
[Fix]
Follow Windows and use S5 for reboot.
[Test case]
Reboot and see if hotkeys like F10/F11 can trigger BIOS functions.
Hotkeys work great with the patch applied.
[Where problems could occur]
If there are platforms don't expect S5 for reboot then there could be
unexpected result.
However Windows uses S5 so that's rather unlikely.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu Focal)
Importance: Undecided
Status: Confirmed
** Affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu Groovy)
Importance: Undecided
Status: Invalid
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem-5.6 (Ubuntu Groovy)
Status: New => Invalid
** Changed in: linux-oem-5.6 (Ubuntu)
Status: New => Invalid
** Changed in: linux (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Groovy)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1904225
Title:
Use ACPI S5 for reboot
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