apport information ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1252462/+attachment/3912800/+files/AlsaInfo.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/1252462 Title: CPU turbo mode frequency issue with Kernel 3.11 under Saucy 13.10 (Intel I7) Status in “linux” package in Ubuntu: Confirmed Bug description: Hi, I am opening this bug because i'm suspecting my processor not to run under good frequencies under 13.10 with default kernel 3.11. My computer is an Asus UX52VS running in Intel i7: Intel Core i7-3537U (See http://www.cpu-world.com/CPUs/Core_i7/Intel- Core%20i7-3537U%20Mobile%20processor%20-%20AV8063801119700.html) It's normal frequency is 2 Ghz with a turbo mode up to 2,9 Ghz in case of CPU Load. When running Kernel 3.11, cpufreq-info gives me following informations: cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpuf...@vger.kernel.org, please. analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us. hardware limits: 775 MHz - 2.50 GHz available frequency steps: 2.50 GHz, 2.50 GHz, 2.40 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 800 MHz, 775 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 775 MHz and 2.00 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 2.50 GHz (asserted by call to hardware). cpufreq stats: 2.50 GHz:-nan%, 2.50 GHz:-nan%, 2.40 GHz:-nan%, 2.20 GHz:-nan%, 2.10 GHz:-nan%, 2.00 GHz:-nan%, 1.90 GHz:-nan%, 1.70 GHz:-nan%, 1.60 GHz:-nan%, 1.50 GHz:-nan%, 1.30 GHz:-nan%, 1.20 GHz:-nan%, 1.10 GHz:-nan%, 1000 MHz:-nan%, 800 MHz:-nan%, 775 MHz:-nan% (582) analyzing CPU 1: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 1 CPUs which need to have their frequency coordinated by software: 1 maximum transition latency: 10.0 us. hardware limits: 775 MHz - 2.50 GHz available frequency steps: 2.50 GHz, 2.50 GHz, 2.40 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 800 MHz, 775 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 775 MHz and 2.00 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 2.50 GHz (asserted by call to hardware). cpufreq stats: 2.50 GHz:-nan%, 2.50 GHz:-nan%, 2.40 GHz:-nan%, 2.20 GHz:-nan%, 2.10 GHz:-nan%, 2.00 GHz:-nan%, 1.90 GHz:-nan%, 1.70 GHz:-nan%, 1.60 GHz:-nan%, 1.50 GHz:-nan%, 1.30 GHz:-nan%, 1.20 GHz:-nan%, 1.10 GHz:-nan%, 1000 MHz:-nan%, 800 MHz:-nan%, 775 MHz:-nan% (958) analyzing CPU 2: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 2 CPUs which need to have their frequency coordinated by software: 2 maximum transition latency: 10.0 us. hardware limits: 775 MHz - 2.50 GHz available frequency steps: 2.50 GHz, 2.50 GHz, 2.40 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 800 MHz, 775 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 775 MHz and 2.00 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 2.50 GHz (asserted by call to hardware). cpufreq stats: 2.50 GHz:-nan%, 2.50 GHz:-nan%, 2.40 GHz:-nan%, 2.20 GHz:-nan%, 2.10 GHz:-nan%, 2.00 GHz:-nan%, 1.90 GHz:-nan%, 1.70 GHz:-nan%, 1.60 GHz:-nan%, 1.50 GHz:-nan%, 1.30 GHz:-nan%, 1.20 GHz:-nan%, 1.10 GHz:-nan%, 1000 MHz:-nan%, 800 MHz:-nan%, 775 MHz:-nan% (439) analyzing CPU 3: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 3 CPUs which need to have their frequency coordinated by software: 3 maximum transition latency: 10.0 us. hardware limits: 775 MHz - 2.50 GHz available frequency steps: 2.50 GHz, 2.50 GHz, 2.40 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 800 MHz, 775 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 775 MHz and 2.00 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 2.00 GHz (asserted by call to hardware). cpufreq stats: 2.50 GHz:-nan%, 2.50 GHz:-nan%, 2.40 GHz:-nan%, 2.20 GHz:-nan%, 2.10 GHz:-nan%, 2.00 GHz:-nan%, 1.90 GHz:-nan%, 1.70 GHz:-nan%, 1.60 GHz:-nan%, 1.50 GHz:-nan%, 1.30 GHz:-nan%, 1.20 GHz:-nan%, 1.10 GHz:-nan%, 1000 MHz:-nan%, 800 MHz:-nan%, I don't understand why "frequency should be within 775 MHz and 2.00 GHz." ? As far as i can see with various tools, the current frequency nevers goes up to 2 Ghz which is far away from the turbo hardware limit... Another tool says almost the same: analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us. hardware limits: 775 MHz - 2.50 GHz available frequency steps: 2.50 GHz, 2.50 GHz, 2.40 GHz, 2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 800 MHz, 775 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 775 MHz and 2.00 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 1.60 GHz. cpufreq stats: 2.50 GHz:-nan%, 2.50 GHz:-nan%, 2.40 GHz:-nan%, 2.20 GHz:-nan%, 2.10 GHz:-nan%, 2.00 GHz:-nan%, 1.90 GHz:-nan%, 1.70 GHz:-nan%, 1.60 GHz:-nan%, 1.50 GHz:-nan%, 1.30 GHz:-nan%, 1.20 GHz:-nan%, 1.10 GHz:-nan%, 1000 MHz:-nan%, 800 MHz:-nan%, 775 MHz:-nan% (3159) boost state support: Supported: yes Active: yes 25500 MHz max turbo 4 active cores 25500 MHz max turbo 3 active cores 25500 MHz max turbo 2 active cores 25500 MHz max turbo 1 active cores Running under very high CPU load, i can see using turbostat: cor CPU %c0 GHz TSC SMI %c1 %c3 %c6 %c7 CTMP PTMP %pc2 %pc3 %pc6 %pc7 Pkg_W Cor_W GFX_W 84.87 2.88 2.49 0 15.13 0.00 0.00 0.00 84 84 0.00 0.00 0.00 0.00 16.07 11.10 0.19 0 0 78.49 2.88 2.50 0 21.51 0.00 0.00 0.00 81 84 0.00 0.00 0.00 0.00 16.07 11.10 0.19 0 2 88.18 2.88 2.50 0 11.81 1 1 80.60 2.88 2.49 0 19.40 0.00 0.00 0.00 84 1 3 92.23 2.88 2.49 0 7.77 cor CPU %c0 GHz TSC SMI %c1 %c3 %c6 %c7 CTMP PTMP %pc2 %pc3 %pc6 %pc7 Pkg_W Cor_W GFX_W 85.58 2.89 2.49 0 14.39 0.03 0.00 0.00 84 84 0.00 0.00 0.00 0.00 16.20 11.25 0.17 0 0 92.59 2.89 2.49 0 7.36 0.05 0.00 0.00 82 84 0.00 0.00 0.00 0.00 16.20 11.25 0.17 0 2 78.25 2.89 2.49 0 21.70 1 1 85.93 2.89 2.49 0 14.07 0.00 0.00 0.00 84 1 3 85.56 2.89 2.49 0 14.44 cor CPU %c0 GHz TSC SMI %c1 %c3 %c6 %c7 CTMP PTMP %pc2 %pc3 %pc6 %pc7 Pkg_W Cor_W GFX_W 84.59 2.89 2.49 0 15.41 0.00 0.00 0.00 83 83 0.00 0.00 0.00 0.00 16.01 11.14 0.11 0 0 95.59 2.89 2.49 0 4.41 0.00 0.00 0.00 81 83 0.00 0.00 0.00 0.00 16.01 11.14 0.11 0 2 62.31 2.88 2.49 0 37.69 1 1 87.46 2.89 2.49 0 12.54 0.00 0.00 0.00 83 1 3 93.02 2.89 2.49 0 6.98 But, when using the last Kernel 3.12 (rc7) revision what i see is completely different! With running kernel 3.12: cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpuf...@vger.kernel.org, please. 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 - 3.10 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 800 MHz and 3.10 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 2.90 GHz (asserted by call to hardware). analyzing CPU 1: driver: intel_pstate CPUs which run at the same hardware frequency: 1 CPUs which need to have their frequency coordinated by software: 1 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 3.10 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 800 MHz and 3.10 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 2.90 GHz (asserted by call to hardware). analyzing CPU 2: driver: intel_pstate CPUs which run at the same hardware frequency: 2 CPUs which need to have their frequency coordinated by software: 2 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 3.10 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 800 MHz and 3.10 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 2.90 GHz (asserted by call to hardware). analyzing CPU 3: driver: intel_pstate CPUs which run at the same hardware frequency: 3 CPUs which need to have their frequency coordinated by software: 3 maximum transition latency: 0.97 ms. hardware limits: 800 MHz - 3.10 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 800 MHz and 3.10 GHz. The governor "powersave" may decide which speed to use within this range. current CPU frequency is 2.90 GHz (asserted by call to hardware). As you can see the 2 kernels does not seem to use the same driver, intel_pstate for Kernel 3.12 and acpi-cpufreq for Kernel 3.11. Reported speed are correct for Kernel 3.12 and the system works much better and more fluent, i can really feal the difference. Frequency tools report a good frequency, going up to 3 Ghz under high CPU Load. (under Kernel 3.12 i can't use turbostat, gives me an error : turbostat not found for kernel 3.12.0-031200rc7 You may need to install linux-tools-3.12.0-031200rc7-generic ) So what does that mean ? Is a 3.11 kernel unable to manage correctly that kind of processor ? Anything else to do to correct that ? Many people have that kind of modern processor in recent laptops, i guess many shall be interested in... Thank you in advance for your help ! --- ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: guilhem 2323 F.... pulseaudio DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=167b604e-be33-4115-84e6-f8956fea9fac InstallationDate: Installed on 2013-11-18 (0 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: ASUSTeK COMPUTER INC. UX52VS MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic root=UUID=3c164fba-bc7c-4e5f-b716-4006086b4efd ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6 RelatedPackageVersions: linux-restricted-modules-3.11.0-13-generic N/A linux-backports-modules-3.11.0-13-generic N/A linux-firmware 1.116 Tags: saucy Uname: Linux 3.11.0-13-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers dmi.bios.date: 10/25/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX52VS.202 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX52VS dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX52VS.202:bd10/25/2012:svnASUSTeKCOMPUTERINC.:pnUX52VS:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX52VS:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: UX52VS dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. --- ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: guilhem 2087 F.... pulseaudio DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=167b604e-be33-4115-84e6-f8956fea9fac InstallationDate: Installed on 2013-11-18 (0 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: ASUSTeK COMPUTER INC. UX52VS MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic root=UUID=3c164fba-bc7c-4e5f-b716-4006086b4efd ro quiet splash intel_pstate=enable vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6 RelatedPackageVersions: linux-restricted-modules-3.11.0-13-generic N/A linux-backports-modules-3.11.0-13-generic N/A linux-firmware 1.116 Tags: saucy Uname: Linux 3.11.0-13-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers dmi.bios.date: 10/25/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX52VS.202 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX52VS dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX52VS.202:bd10/25/2012:svnASUSTeKCOMPUTERINC.:pnUX52VS:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX52VS:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: UX52VS dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. 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