** Tags added: originate-from-1891607 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.6 in Ubuntu. https://bugs.launchpad.net/bugs/1896598
Title: Enable LTR for endpoints behind VMD Status in HWE Next: New Status in linux package in Ubuntu: Fix Released Status in linux-oem-5.6 package in Ubuntu: New 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: Fix Released Status in linux-oem-5.6 source package in Groovy: Invalid Bug description: [Impact] PCIe links behind VMD may not be able to reach ASPM L1.2, because PCIe Link Tolenrence Reporting doesn't get programmed with a sensible value. [Fix] Temporarily hardcode LTR value, which is used by Windows, for NVMe devices behind VMD. [Test] With the patch applied, PCIe links can reach ASPM L1.2, hence the entire Intel SoC can reach deeper power saving state. [Regression Potential] This patch targets specifically Intel Tigerlake VMD bridges, so there won't be any regression since they are not on the market yet. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1896598/+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
