I switched from Ubuntu 12.04.3 LTS with 3.80 kernel to Manjaro. The reason is Ubuntu enables nvidia optimus technology via the latest 319 drivers. In practice Ubuntu is among the few distros where the current implementation of works well. The frame rates with games go more than twice than with Bumblebee and optirun command. All this is fine if your intention are to use your laptop as a gaming machine. Sadly on my i7 ivybridge laptop, this also meant added heat to the tune of +10C and more at idle as compared to Bumblebee as well as very low battery life, I lost close to one and half hour.
I decided to try out Manjaro as it brings me to Arch minus the headaches. Manjaro implements latest nvidia 325 drivers during install with choice of kernel 3.4, 3.10 and latest 3.11 This also gave me a chance to try out Intel's Pstate driver. In 3.11 it has matured greatly. In practice compared to non Pstate kernel 3.4 the CPU at idle ran around 50C average whereas with 3.4 kernel they would run at 45C going down to 39c sometimes. This was kind of disappointing but I saw the cores getting better utilized and system response snappier than cpu freq ondemand. I then decided to install Intel Thermal Daemon and something wonderful occurred. The idle temps didn't go down but peak temps under full load never ever exceeded 60C with max of 68c under full load. Without the daemon under full load they would touch up to 75, still lower than close to 90c I was getting with Ubuntu and kernel 3.8 The temp average now puts Windows machine to shame, its lower under load and also battery life with TLP is as good as Windows machine. So looks like good things are in store for Linux in future. The kernel 3.11 is a beauty, rock stable and very efficient with far lower memory consumption. Time for Ubuntu to get into action on this. -- 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/1188647 Title: Please change intel_pstate default to disable Status in “linux” package in Ubuntu: Fix Released Bug description: 3.9 introduced a new default governor on SandyBridge CPUs called INTEL_PSTATE which, when built in and enabled (the default), removes all other governors (like our usual default, ondemand). 3.10 extended this to Ivybridge generation CPUs. In theory, this isn't an awful thing, as the new Intel pstate governor should be higher performance and give better power savings. In theory. In practice, it drives my CPUs to max frequency nearly constantly, spins my fans like mad and, somehow, does all of this while also eating enough CPU time in kernel threads to make my machine choppy, unresponsive, and unable to do simple things like play videos when I get off work. Therefore, I propose that we, for now, toggle intel_pstate to disable by default (I am using intel_pstate=disable on my command line right now, with great success), so it's still built in, and people can play with it, but it's off by default. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.9.0-4-generic 3.9.0-4.9 ProcVersionSignature: Ubuntu 3.9.0-4.9-generic 3.9.4 Uname: Linux 3.9.0-4-generic x86_64 ApportVersion: 2.10.2-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: adconrad 2574 F.... pulseaudio CurrentDmesg: [ 30.633035] init: plymouth-stop pre-start process (2079) terminated with status 1 [ 36.086916] br0: port 1(eth0) entered forwarding state Date: Fri Jun 7 08:48:56 2013 HibernationDevice: RESUME=UUID=73040efa-baec-458a-8307-3bca07b26c3c InstallationDate: Installed on 2012-12-09 (179 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20121209) MachineType: LENOVO 4173LPB MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.9.0-4-generic root=UUID=2222aad5-ef31-4428-973f-71740fc7cb6a ro intel_pstate=disable quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.9.0-4-generic N/A linux-backports-modules-3.9.0-4-generic N/A linux-firmware 1.109 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/13/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 8CET55WW (1.35 ) dmi.board.asset.tag: Not Available dmi.board.name: 4173LPB dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8CET55WW(1.35):bd09/13/2012:svnLENOVO:pn4173LPB:pvrThinkPadT420s:rvnLENOVO:rn4173LPB:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4173LPB dmi.product.version: ThinkPad T420s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647/+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
