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** Tags added: verification-needed-focal

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https://bugs.launchpad.net/bugs/1888331

Title:
  Wakeup the system by touching the touchpad

Status in HWE Next:
  New
Status in linux-oem-5.6 package in Ubuntu:
  New
Status in linux-oem-5.6 source package in Focal:
  Fix Committed

Bug description:
  [Impact]
  Can't wake up by touching the touchpad.

  [Fix]
  1.gpio: With 'commit 461c1a7d4733 ("gpiolib: override irq_enable/disable")'
    gpiolib overrides irqchip's irq_enable and irq_disable callbacks. If 
irq_disable
    callback is implemented then genirq takes unlazy path to disable irq. 
Underlying irqchip
    may not want to implement irq_disable callback to lazy disable irq
    when client drivers invokes disable_irq(). By overriding irq_disable 
callback,
    gpiolib ends up always unlazy disabling IRQ.
    Allow gpiolib to lazy disable IRQs by overriding irq_disable callback only
    if irqchip implemented irq_disable. In cases where irq_disable is not
    implemented irq_mask is overridden. Similarly override irq_enable callback
    only if irqchip implemented irq_enable otherwise irq_unmask is overridden.
  2. hid: Many laptops can be woken up from Suspend-to-Idle by touchpad. This is
     also the default behavior on other OSes.
     However, if touchpad and touchscreen contact to each other when lid is
     closed, wakeup events can be triggered inadventertly.
     So let's disable the wakeup by default, but enable the wakeup capability
     so users can enable it at their own discretion.

  [test]
  With the patch and manually enable HID's power/wakeup, the system can wake up 
by touching the touchpad.

  [Regression Potential]
  Low. The two patches are already landed in the upstream.

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