I'm pretty sure this is not the first time a power-saving feature breaks some subset of hardware. Why even add it in a bugfix update?
After applying the workaround from LP#1678184, I'm happy about the somewhat improved battery life, but I'll never get back the several hours it took to figure out what's going on, and considering whether I should contact Dell support about my failing storage device (which wouldn't have helped, but would probably have wasted several weeks on top of that). And I'm still on 16.10. Why was this even released in Yakkety, with LP#1678184 having been reported on March 31? -- 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/1664602 Title: Using an NVMe drive causes huge power drain Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Confirmed Status in linux source package in Yakkety: Fix Released Status in linux source package in Zesty: Fix Released Bug description: PCIe NVMe drives are very common in new laptops. The Zesty's kernels (including latest 4.10 rc8 from CKT PPA) does not support APST (autonomous power state transitions). A patch does exist : http://lists.infradead.org/pipermail/linux-nvme/2017-February/008051.html https://github.com/damige/linux-nvme It seems that we cannot expect this before kernel 4.11. Additionally my laptop CPU does never go under PC3 power saving state, powertop says. I don't know if it's related. --- ApportVersion: 2.20.4-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ft 1900 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 17.04 HibernationDevice: RESUME=UUID=a04b55bf-b1b6-464c-88ce-44b6adbbbc10 InstallationDate: Installed on 2016-12-12 (63 days ago) InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Alpha amd64 (20161211) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. Precision 7510 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash ProcFB: 0 nouveaufb 1 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-8-generic root=UUID=0d1f213e-73a9-4097-ae64-9cd963cfba23 ro quiet ProcVersionSignature: Ubuntu 4.10.0-8.10-generic 4.10.0-rc8 RelatedPackageVersions: linux-restricted-modules-4.10.0-8-generic N/A linux-backports-modules-4.10.0-8-generic N/A linux-firmware 1.163 Tags: zesty Uname: Linux 4.10.0-8-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 12/22/2016 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.9.5 dmi.board.name: 0YH43H dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.9.5:bd12/22/2016:svnDellInc.:pnPrecision7510:pvr:rvnDellInc.:rn0YH43H:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Precision 7510 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664602/+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
