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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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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 package in Ubuntu:
Incomplete
Status in linux-oem-5.6 package in Ubuntu:
Fix Released
Status in linux source package in Focal:
Won't Fix
Status in linux-oem-5.6 source package in Focal:
Fix Released
Status in linux source package in Groovy:
Incomplete
Status in linux-oem-5.6 source package in Groovy:
Fix Released
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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