just for the record, The issue was caused by the sabnzbplusd addon. My sabnzbplusd was crashed but the firefox-addon was trying to contact the server every second. Thats waht the strace is telling from #1.
-- 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/927547 Title: [12.04] latest firefox ( 11.0~b2+build1-0) is always producing 100% cpu usage Status in “firefox” package in Ubuntu: Invalid Bug description: firefox is producing 100% cpu load, surfing in the web is impossible with that situation calling firefox from the shell did not show usefull debug-infos strace should a loop with this gettimeofday({1328525301, 822359}, NULL) = 0 read(5, 0xbff1cfcc, 16) = -1 EAGAIN (Resource temporarily unavailable) recv(4, "\34\0\376\5\252\0\0\0u\1\0\0\01070\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 4096, MSG_WAITALL) = 32 recv(4, 0xb7591058, 4096, MSG_WAITALL) = -1 EAGAIN (Resource temporarily unavailable) gettimeofday({1328525301, 823129}, NULL) = 0 recv(4, 0xb7591058, 4096, MSG_WAITALL) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}, {fd=7, events=POLLIN|POLLPRI}, {fd=9, events=POLLIN}, {fd=18, events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, events=POLLIN}, {fd=20, events=POLLIN}], 8, -1) = ? ERESTART_RESTARTBLOCK (To be restarted) --- SIGWINCH (Window changed) @ 0 (0) --- restart_syscall(<... resuming interrupted call ...>) = 1 gettimeofday({1328525302, 720471}, NULL) = 0 read(5, 0xbff1cfcc, 16) = -1 EAGAIN (Resource temporarily unavailable) write(5, "\1\0\0\0\0\0\0\0", 8) = 8 read(20, "\372", 1) = 1 write(5, "\1\0\0\0\0\0\0\0", 8) = 8 gettimeofday({1328525302, 721823}, NULL) = 0 gettimeofday({1328525302, 722152}, NULL) = 0 futex(0xb3d12ec8, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb3d12ec4, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 gettimeofday({1328525302, 723004}, NULL) = 0 access("/var/run/firefox-restart-required", F_OK) = -1 ENOENT (No such file or directory) gettimeofday({1328525302, 724485}, NULL) = 0 gettimeofday({1328525302, 724767}, NULL) = 0 gettimeofday({1328525302, 724959}, NULL) = 0 gettimeofday({1328525302, 725140}, NULL) = 0 futex(0xb701fbc8, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb701fbc4, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 gettimeofday({1328525302, 725563}, NULL) = 0 recv(4, 0xb7591058, 4096, MSG_WAITALL) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}, {fd=7, events=POLLIN|POLLPRI}, {fd=9, events=POLLIN}, {fd=18, events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, events=POLLIN}, {fd=20, events=POLLIN}], 8, 0) = 1 ([{fd=5, revents=POLLIN}]) gettimeofday({1328525302, 726316}, NULL) = 0 read(5, "\2\0\0\0\0\0\0\0", 16) = 8 gettimeofday({1328525302, 726691}, NULL) = 0 recv(4, 0xb7591058, 4096, MSG_WAITALL) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}, {fd=7, events=POLLIN|POLLPRI}, {fd=9, events=POLLIN}, {fd=18, events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, events=POLLIN}, {fd=20, events=POLLIN}], 8, 0) = 0 (Timeout) gettimeofday({1328525302, 727363}, NULL) = 0 read(5, 0xbff1cfcc, 16) = -1 EAGAIN (Resource temporarily unavailable) gettimeofday({1328525302, 727739}, NULL) = 0 recv(4, 0xb7591058, 4096, MSG_WAITALL) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}, {fd=7, events=POLLIN|POLLPRI}, {fd=9, events=POLLIN}, {fd=18, events=POLLIN}, {fd=19, events=POLLIN}, {fd=23, events=POLLIN}, {fd=20, events=POLLIN}], 8, 0) = 0 (Timeout) gettimeofday({1328525302, 728455}, NULL) = 0 read(5, 0xbff1cfcc, 16) = -1 EAGAIN (Resource temporarily unavailable) gettimeofday({1328525302, 728816}, NULL) = 0 recv(4, 0xb7591058, 4096, MSG_WAITALL) = -1 EAGAIN (Resource temporarily unavailable) ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: firefox 11.0~b1+build1-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2 Uname: Linux 3.2.0-12-generic i686 AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 1.91-0ubuntu1 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: michael 1672 F.... pulseaudio BuildID: 20120203211222 Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf7eb8000 irq 44' Mixer name : 'Realtek ALC269' Components : 'HDA:10ec0269,1043831a,00100004' Controls : 17 Simple ctrls : 9 Channel: beta Date: Mon Feb 6 11:48:33 2012 EcryptfsInUse: Yes ForcedLayersAccel: False InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110426) IpRoute: default via 192.168.178.1 dev wlan0 proto static 192.168.178.0/24 dev wlan0 proto kernel scope link src 192.168.178.39 metric 2 Plugins: IcedTea-Web Plugin (using IcedTea-Web 1.2pre (1.2~pre1-0ubuntu1)) - Lib=IcedTeaPlugin.so, Location=/usr/lib/jvm/java-6-openjdk-i386/jre/lib/i386 Shockwave Flash - Lib=libflashplayer.so, Location=/usr/lib/flashplugin-installer Adobe Reader 9.4 - Lib=nppdf.so, Location=/usr/lib/mozilla/plugins ProcEnviron: PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash Profiles: Profile0 (Default) - LastVersion=11.0/20120203211222 RunningIncompatibleAddons: True SourcePackage: firefox UpgradeStatus: Upgraded to precise on 2011-12-04 (63 days ago) dmi.bios.date: 06/11/2009 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2103 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: 901 dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: x.xx dmi.chassis.asset.tag: 0x00000000 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTek Computer INC. dmi.chassis.version: x.x dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2103:bd06/11/2009:svnASUSTeKComputerINC.:pn901:pvrx.x:rvnASUSTeKComputerINC.:rn901:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x: dmi.product.name: 901 dmi.product.version: x.x dmi.sys.vendor: ASUSTeK Computer INC. 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