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- artful' to 'verification-done-artful'. If the problem still exists, change the tag 'verification-needed-artful' to 'verification-failed- artful'.
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-artful -- 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/1743269 Title: P-state not working in kernel 4.13 Status in linux package in Ubuntu: Fix Committed Status in linux source package in Artful: Fix Committed Status in linux source package in Bionic: Fix Committed Bug description: == SRU Justification == Commits b29c6ef7bb12 and 7d5905dc14a8 fix a regression in Artful. They were both added to mainline in v4.15-rc1 and fix the following two commits: b29c6ef7bb12 Fixes: 4815d3c56d1e (cpufreq: x86: Make scaling_cur_freq behave more as expected) 7d5905dc14a8 Fixes: 890da9cf0983 (Revert "x86: do not use cpufreq_quick_get() for /proc/cpuinfo "cpu MHz"") According to the bug report, P-state is not working in Artful, but it was working in Zesty. This bug is happening on a Lenovo Thinkpad X230 with an Intel Core i5-3210M CPU. The bug reporter is using CPU scaling to improve battery life. == Fixes == b29c6ef7bb12 ("x86 / CPU: Avoid unnecessary IPIs in arch_freq_get_on_cpu()") 7d5905dc14a8 ("x86 / CPU: Always show current CPU frequency in /proc/cpuinfo") == Regression Potential == Low. The two commit fix a current regression and have had additiona upstream reviews from being send to stable. ## Original Bug Description ## I have a Lenovo Thinkpad X230 with an Intel Core i5-3210M CPU. I'm using Xubuntu 17.10 (Description: Ubuntu 17.10, Release: 17.10). I use tlp 1.0-1~artful in order to improve battery performance, particularly enabling the Intel P-state performance scaling. In Xubuntu 17.04 it worked flawlessly, but when I upgraded to 17.10 the processor doesn't scale anymore. I ran all the updates and it's not working. I also did a clean install using another hard drive and the problem persist. I searched the tlp forums and similar problems pointed to a kernel bug, so I'm filing this report. I tested different mainline kernels in order to see what kernel version is causing the problem: Up to mainline kernel 4.12.14 generic, P-state scaling is OK Kernel 4.13 generic up to kernel 4.14.12 generic, P-state scaling is not working Kernel 4.14.13 generic up to 4.15 rc7 generic, P-state scaling is OK ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-25-generic 4.13.0-25.29 ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13 Uname: Linux 4.13.0-25-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: eduar 1686 F.... pulseaudio CurrentDesktop: XFCE Date: Sun Jan 14 18:46:27 2018 HibernationDevice: RESUME=UUID=ec172c41-ddb8-4d67-8249-390aa1bb6331 InstallationDate: Installed on 2017-02-07 (341 days ago) InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: LENOVO 232032U ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-25-generic root=UUID=a5c459a3-f6c9-40cd-a648-e7b8b28a2ee6 ro radeon.dpm=1 quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-25-generic N/A linux-backports-modules-4.13.0-25-generic N/A linux-firmware 1.169.1 SourcePackage: linux UpgradeStatus: Upgraded to artful on 2018-01-13 (1 days ago) dmi.bios.date: 09/25/2017 dmi.bios.vendor: LENOVO dmi.bios.version: G2ETB0WW (2.70 ) dmi.board.asset.tag: Not Available dmi.board.name: 232032U dmi.board.vendor: LENOVO dmi.board.version: NO DPK dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG2ETB0WW(2.70):bd09/25/2017:svnLENOVO:pn232032U:pvrThinkPadX230:rvnLENOVO:rn232032U:rvrNODPK:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad X230 dmi.product.name: 232032U dmi.product.version: ThinkPad X230 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1743269/+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
