Public bug reported:

**[HP ZBook Power 16 G11 A] Short press of power button generates no
KEY_POWER event on Ubuntu**

Hardware: HP ZBook Power 16 G11 A Mobile Workstation PC

CPU: AMD Ryzen 7 8845HS

BIOS: W85 Ver. 01.11.01

OS: Ubuntu 24.04 LTS

**Problem:**

Short-pressing the physical power button while Ubuntu is running has no
effect. The button works normally when powering on the laptop from a
fully powered-off state.

**Tests performed:**

* Reproduced with Linux 7.0.0-34-generic and 7.0.0-38-generic.
* Also reproduced the lack of shutdown response in an Ubuntu 26.04 Live USB 
session.
* GNOME power button action is configured as `interactive`.
* `evtest` shows no KEY_POWER event when pressing the physical power button on 
Ubuntu 24.04.
* The `gpio-keys` input device advertises KEY_POWER support.
* No corresponding increase was observed in the `amd_gpio` power IRQ counter 
during testing.
* Shutting down through the desktop menu or `sudo poweroff` works normally.

**Expected behavior:**

The operating system should receive a power button event when the
physical power button is briefly pressed.

**Actual behavior:**

No input event is detected and no shutdown action occurs.

This may involve ACPI, GPIO interrupt routing, HP firmware, or Linux
kernel driver compatibility.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2171395

Title:
  [HP ZBook Power 16 G11 A] Short press of power button generates no
  KEY_POWER event on Ubuntu

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