Public bug reported:
[Impact]
Dell Precision 5550 cannot detect Thunderbolt device hotplug.
[Fix]
Refresh ACPI wakeup power if it's already enabled to make GPE work.
[Test]
Make sure the root port of TBT hierachy is in D3cold.
Plug a Thunderbolt Dock or Thunderbolt Disk, the system cannot detect
anything.
With the patch applied, OS can always detect hotplugged Thunderbolt
devices.
[Where problems could occur]
Though we refresh the wakeup device power, we didn't disable/enable ACPI
GPEs, so we won't miss any GPE event from this fix.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux (Ubuntu Groovy)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.6 (Ubuntu Groovy)
Importance: Undecided
Status: Invalid
** Tags: oem-priority originate-from-1878157 somerville
** 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-oem-5.6 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Groovy)
Status: New => Confirmed
** Changed in: linux (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Groovy)
Importance: Undecided => Medium
** Changed in: linux-oem-5.6 (Ubuntu Focal)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1906229
Title:
Refresh ACPI wakeup power to make Thunderbolt hotplug detection work
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