This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed- bionic'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-bionic -- 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/1804588 Title: Power consumption during s2idle is higher than long idle (Intel SSDPEKKF) Status in HWE Next: New Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: New Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Status in linux source package in Disco: In Progress Bug description: [Impact] On new systems that facilitate s2idle, we observed the power consumption raises higher than long idle does during s2idle with Intel NVMe SSDPEKKF. Short idle: 6 Long idle: 2 S2I: 4.8 [Fix] Windows doesn't put nvme to D3 in modern standby, and uses its own APST feature to do the power management. To leverage its APST feature during s2idle, we can't disable nvme device while suspending, too. So, here is what we did on the driver, 1. prevent nvme from entering D3, 2. prevent nvme from being disabled when suspending. [Test] Verified on the new Intel NVMe, it fixes the power consumption issue with no regression. And the power consumption decreases to 2.8W during s2idle. [Regression Potential] Low, the patches only applied to specific nvme module, and from our test, the system is still stable. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1804588/+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
