Public bug reported:
===SRU Justification===
[Impact]
New TBT controllers may use Native PCIe Enumeration (i.e. just like
other normal PCIe device listed under lspci) instead of ACPI hotplug.
Since TBT controller stops getting unplugged from PCIe bus, it draws
additional power.
[Fix]
Support runtime power management for TBT controllers, so it can be put
to D3 to save powers.
[Test]
I tested and verified this patch series can make Lenovo T480's TBT
controller enters PCI D3 at runtime.
[Regression Potential]
Low. Almost all TBT controllers in the wild still uses ACPI hotplug,
this series won't affect those users.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1789358
Title:
Support Power Management for Thunderbolt Controller
Status in linux package in Ubuntu:
New
Bug description:
===SRU Justification===
[Impact]
New TBT controllers may use Native PCIe Enumeration (i.e. just like
other normal PCIe device listed under lspci) instead of ACPI hotplug.
Since TBT controller stops getting unplugged from PCIe bus, it draws
additional power.
[Fix]
Support runtime power management for TBT controllers, so it can be put
to D3 to save powers.
[Test]
I tested and verified this patch series can make Lenovo T480's TBT
controller enters PCI D3 at runtime.
[Regression Potential]
Low. Almost all TBT controllers in the wild still uses ACPI hotplug,
this series won't affect those users.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1789358/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
