I think I've got it fixed. I submitted a patch, so we'll see. The problem commit added a test to the bad-irq routines, checking whether they were already running. One of these tests had an equal-to operator, "==", where it seems to need "!=", not equal. Making that one change in kernel/irq/spurious.c fixes the regression for me. I've tested it successfully it on various kernels, including the current Oneiric source.
The submitted patch is attached. And here it is on LKML, in (hopeful) case anything happens there: https://lkml.org/lkml/2011/11/1/267 Please test if you can. Thanks. ** Patch added: "Patch I submitted to LKML" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/855199/+attachment/2582068/+files/0001-genirq-spurious.c-fix-regression-that-broke-irqfixup.patch -- You received this bug notification because you are a member of UBUNTU - AL - BR, which is subscribed to Mythbuntu. https://bugs.launchpad.net/bugs/855199 Title: "irqfixup" and "irqpoll" broken since 2.6.39 Status in The Linux Kernel: Confirmed Status in Mythbuntu, Ubuntu derivative focused upon MythTV: Confirmed Status in “linux” package in Ubuntu: Triaged Bug description: In all kernels since 2.6.39, the "irqfixup" and "irqpoll" options are no longer taking effect. I have several machines that need to boot with one of these options, and I see reports of this regression from multiple other users. The interrupts now generate the same errors seen without these kernel options, e.g.: irq 19: nobody cared (try booting with the "irqpoll" option) even though irqpoll, or irqfixup, is used. I don't know whether these options fail in all cases, or if some unknown hardware configurations are out there continuing to work. The Linux irq code was reworked during the 2.6.39 cycle. I have gone through the patches, and this is the commit where the regression arrives: commit d05c65fff0ef672be75429266751f0e015b54d94 genirq: spurious: Run only one poller at a time No point in running concurrent pollers which confuse each other by setting PENDING. author Thomas Gleixner <[email protected]> Mon, 7 Feb 2011 13:31:37 +0000 (14:31 +0100) committer Thomas Gleixner <[email protected]> Sat, 19 Feb 2011 11:58:09 +0000 (12:58 +0100) http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=d05c65fff0ef672be75429266751f0e015b54d94 I emailed LKML and Mr. Gleixner, who is the subsystem maintainer, but got no response to date. (And the kernel bugzilla is still down.) I had not isolated this single patch, out of the pile, then. I'm trying to look the patch over, to improve my case, before my next try at getting maintainer attention. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: linux-image-3.0.0-11-generic 3.0.0-11.18 ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4 Uname: Linux 3.0.0-11-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu1 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: IXP [ATI IXP], device 0: ATI IXP AC97 [ATI IXP AC97] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ed 1696 F.... pulseaudio /dev/snd/controlC0: ed 1696 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'IXP'/'ATI IXP rev 2 with ALC655 at 0xfe02a000, irq 17' Mixer name : 'Realtek ALC655 rev 0' Components : 'AC97a:414c4760' Controls : 41 Simple ctrls : 26 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xfcffc000 irq 18' Mixer name : 'Nvidia GPU 0d HDMI/DP' Components : 'HDA:10de000d,10de0101,00100100' Controls : 17 Simple ctrls : 5 Date: Tue Sep 20 21:19:35 2011 HibernationDevice: RESUME=UUID=821c96d0-f0af-4f34-a8c6-2713248cacc1 InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) IwConfig: lo no wireless extensions. eth0 no wireless extensions. MachineType: Hewlett-Packard HP dx5150 MT ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=7649d274-b118-4ac7-b7c8-2fb7e42094bf ro quiet splash irqpoll vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.0.0-11-generic N/A linux-backports-modules-3.0.0-11-generic N/A linux-firmware 1.60 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to oneiric on 2011-09-20 (0 days ago) dmi.bios.date: 08/01/2006 dmi.bios.vendor: Phoenix Technologies, LTD dmi.bios.version: 1.18 dmi.board.name: 09AC dmi.board.vendor: MSI dmi.chassis.asset.tag: 2UA63214R9 dmi.chassis.type: 3 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr1.18:bd08/01/2006:svnHewlett-Packard:pnHPdx5150MT:pvr:rvnMSI:rn09AC:rvr:cvnHewlett-Packard:ct3:cvr: dmi.product.name: HP dx5150 MT dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/855199/+subscriptions -- Mailing list: https://launchpad.net/~linux-traipu Post to : [email protected] Unsubscribe : https://launchpad.net/~linux-traipu More help : https://help.launchpad.net/ListHelp
