I had similar issues. In my case it was due to my battery being dead and being connected to a low quality AC power source.
Your CPU is stuck at 1.20 GHz, but should go up to 2.10 GHz : current policy: frequency should be within 1.20 GHz and 1.20 GHz. There is more info here: http://www.thinkwiki.org/wiki/Problem_with_CPU_frequency_scaling In my case I connected directly to a higher quality AC source (without an extension cable), added "processor.ignore_ppc=1" to the kernel boot command line, and am running without the (dead) battery installed. Try that out and see if it helps. ** Changed in: firefox (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1177439 Title: Firefox freezes temporarily Status in “firefox” package in Ubuntu: Incomplete Bug description: Since the update to firefox 20.0 which came with ubuntu 13.04 my firefox freezes the entire desktop occassionally. Usually this lasts for 10-20 seconds until everything works normal again. In case a youtube video is playing in one of the tabs the audio continues for about 5s and then stops also. When I have top running in a terminal I can see that CPU usage for firefox goes up a lot. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: firefox 20.0+build1-0ubuntu2 ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8 Uname: Linux 3.8.0-19-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.9.2-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jens 2132 F.... pulseaudio BuildID: 20130417085609 Channel: Unavailable Date: Tue May 7 17:47:09 2013 EcryptfsInUse: Yes ForcedLayersAccel: False IfupdownConfig: auto lo iface lo inet loopback InstallationDate: Installed on 2012-08-13 (266 days ago) InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) IpRoute: default via 192.168.2.1 dev wlan0 proto static 169.254.0.0/16 dev wlan0 scope link metric 1000 192.168.2.0/24 dev wlan0 proto kernel scope link src 192.168.2.100 metric 9 MarkForUpload: True MostRecentCrashID: bp-1d1c4004-5dc0-40a5-a6c1-51cc32121030 Plugins: Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so Shockwave Flash - [HomeDir]/.mozilla/plugins/libflashplayer.so PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=20.0/20130417085609 (In use) RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: Upgraded to raring on 2013-04-27 (10 days ago) dmi.bios.date: 11/19/2009 dmi.bios.vendor: LENOVO dmi.bios.version: 7YET79WW (3.09 ) dmi.board.name: 2731A11 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:bvr7YET79WW(3.09):bd11/19/2009:svnLENOVO:pn2731A11:pvrThinkPadR500:rvnLENOVO:rn2731A11:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2731A11 dmi.product.version: ThinkPad R500 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1177439/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
