** Description changed: This bug has been present in all version of Ubuntu since at least version ubuntu 9.10. The lirc_ite8709 kernel module exhibits an incorrect behaviour on suspend/resume of a laptop. It sends lots of interruptions, which results in acpi sending even more interruptions, which also results in kernel scheduler sending even more interruptions. All this flood of interruptions saturates ksoftirqd. So the symptoms are simple: when using a device supported by lirc_ite8709 (i.e. an infrared receiver): - suspend the laptop - resume it - - observe that ksoftirqd to use 98-100% of one CPU core, unless you reboot your computer + - observe that ksoftirqd uses 98-100% of one CPU core, unless you reboot your computer The only work-around I've been able to find to avoid this behaviour is to disable the module by adding the following line in /etc/modprobe.d/blacklist.conf : - blacklist lirc_ite8709 + blacklist lirc_ite8709 ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: linux-image-2.6.35-19-generic 2.6.35-19.28 Regression: No Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.35-19.28-generic 2.6.35.3 Uname: Linux 2.6.35-19-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: i386 ArecordDevices: - **** List of CAPTURE Hardware Devices **** - card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] - Subdevices: 1/1 - Subdevice #0: subdevice #0 + **** List of CAPTURE Hardware Devices **** + card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] + Subdevices: 1/1 + Subdevice #0: subdevice #0 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: mrlem 1404 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: mrlem 1404 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: - Card hw:0 'Intel'/'HDA Intel at 0xf4600000 irq 48' - Mixer name : 'Conexant CX20549 (Venice)' - Components : 'HDA:14f15045,1631c104,00100100' - Controls : 18 - Simple ctrls : 8 + Card hw:0 'Intel'/'HDA Intel at 0xf4600000 irq 48' + Mixer name : 'Conexant CX20549 (Venice)' + Components : 'HDA:14f15045,1631c104,00100100' + Controls : 18 + Simple ctrls : 8 Date: Sun Sep 5 22:09:41 2010 HibernationDevice: RESUME=UUID=9121ba6d-0473-4aca-946f-9e1fad6be904 InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta i386 (20100901.1) MachineType: Packard Bell BV EasyNote MB85 ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-19-generic root=UUID=c57585d1-55e9-4617-a929-9c3d65b906be ro quiet splash ProcEnviron: - LANG=fr_FR.utf8 - SHELL=/bin/bash + LANG=fr_FR.utf8 + SHELL=/bin/bash RelatedPackageVersions: linux-firmware 1.38 RfKill: - 0: phy0: Wireless LAN - Soft blocked: no - Hard blocked: no + 0: phy0: Wireless LAN + Soft blocked: no + Hard blocked: no SourcePackage: linux dmi.bios.date: 08/01/2007 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: PB2A3A07 dmi.board.name: PB2A dmi.board.vendor: Packard Bell BV dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 1 dmi.chassis.vendor: Packard Bell BV dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrPB2A3A07:bd08/01/2007:svnPackardBellBV:pnEasyNoteMB85:pvrPB92QW0202:rvnPackardBellBV:rnPB2A:rvrNotApplicable:cvnPackardBellBV:ct1:cvrN/A: dmi.product.name: EasyNote MB85 dmi.product.version: PB92QW0202 dmi.sys.vendor: Packard Bell BV
-- lirc_ite8709 kernel module failure on suspend/resume https://bugs.launchpad.net/bugs/631104 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
