apport information ** Attachment added: "PulseList.txt" https://bugs.launchpad.net/bugs/1567316/+attachment/4629218/+files/PulseList.txt
-- 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/1567316 Title: CPU maximum frequency goes down after every resume Status in linux package in Ubuntu: Incomplete Bug description: This bug applies to Ubuntu 15.10, kernel 4.2.0-35-generic and at least two before that. A while ago I noticed that my system had become unbearably slow. A reboot fixed it for a while. It turns out that the problem is related to resuming after closing the laptop lid. After every resume the CPU maximum frequency goes down a bit. This was not always the case and seems to have been introduced after a kernel update. Sadly, I can't pinpoint which one exactly. It can be reproduced on my Lenovo B50-70 even after the latest kernel update to 4.2.0-35-generic of Ubuntu 15.10. I start by rebooting the system. At first, 'sudo cpupower frequency-info' reports a hardware limit of 800 MHz - 2.60 GHz and current policy is between those two. Current frequency varies between those based on load. Now, I close the lid, reopen and check again. Hardware limits are still the same, but policy is now between 800 MHz and 2.08 GHz. Repeat and policies maximum keeps dropping. As does the current frequency maximum. At some point the policy maximum does not drop any further, but the current frequency maximum does. Way below even the minimum of 800 MHz. The expected behaviour is that the current policy matches the hardware limits and that the CPU frequency is set between these values. Here is the output of 'sudo cpupower frequency-info' after the first resume: analyzing CPU 0: driver: intel_pstate CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 2.60 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 800 MHz and 2.08 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 1.03 GHz (asserted by call to hardware). boost state support: Supported: yes Active: yes --- ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC1D0p: erik 1692 F...m pulseaudio /dev/snd/controlC1: erik 1692 F.... pulseaudio /dev/snd/controlC0: erik 1692 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.10 HibernationDevice: RESUME=UUID=e15f518b-0603-40f2-91f8-a715860f726e InstallationDate: Installed on 2015-08-12 (240 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) JournalErrors: No journal files were found. -- No entries -- MachineType: LENOVO 80EU Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic.efi.signed root=UUID=d8909dac-cfa5-4a3e-ac20-e5f1e8b01609 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5 RelatedPackageVersions: linux-restricted-modules-4.2.0-35-generic N/A linux-backports-modules-4.2.0-35-generic N/A linux-firmware 1.149.3 Tags: wily UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' Uname: Linux 4.2.0-35-generic x86_64 UpgradeStatus: Upgraded to wily on 2015-10-25 (165 days ago) UserGroups: dialout sudo wireshark WifiSyslog: _MarkForUpload: True dmi.bios.date: 08/21/2014 dmi.bios.vendor: LENOVO dmi.bios.version: 9DCN22WW(V2.03) dmi.board.asset.tag: No Asset Tag dmi.board.name: Lenovo B50-70 dmi.board.vendor: LENOVO dmi.board.version: 31900058WIN dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo B50-70 dmi.modalias: dmi:bvnLENOVO:bvr9DCN22WW(V2.03):bd08/21/2014:svnLENOVO:pn80EU:pvrLenovoB50-70:rvnLENOVO:rnLenovoB50-70:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoB50-70: dmi.product.name: 80EU dmi.product.version: Lenovo B50-70 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1567316/+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