** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1203941
Title: dahdi-dkms modules not updating properly with kernel updates, can cause soft lockup Status in “linux” package in Ubuntu: Confirmed Bug description: This was originally reported in bug #1184154, which was closed because the originator could no longer contribute. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1184154 From a starting point of 3.2.0-43-generic, dahdi and asterisk are running and working as expected. Updating to a more recent kernel (e.g., 3.2.0-44 or 3.2.0-48), via update manager or manually, results in a system that will not boot. Running the recovery mode version of the kernel from grub shows that shortly after the dahdi module is loaded it gets "soft lockup" on the cores and the system stops booting. I can't enclose logs for this because it doesn't get far enough to write anything out. If I fall back to 3.2.0-43 and add module blacklisting and temporarily remove init.d/dadhi and init.d/asterisk, I can then get 3.2.0-44 to boot since the dadhi module is no longer loaded. From that point, I can run "sudo dpkg-reconfigure dahdi-dkms", which appears to purge the dadhi dkms modules and rebuild them, which is similar to what it appeared to do when installing the new kernel. If I then undo the hack to prevent dadhi from loading and reboot into 3.2.0-44, dadhi loads fine without lockups and asterisk runs as expected. An objdump compare of modules generated after the kernel install and after the dpkg-reconfigure show that they're fairly different -- symbols are moved around and of different sizes. This is easy to reproduce and several people using dadhi have reported the issue (in the earlier bug report) with kernel versions 3.2.0-44 or later. I can purge 3.2.0-44 and then re-update to that version and show that the dadhi modules are causing soft lockups until I do a "dpkg-reconfigure dadhi-dkms". ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-44-generic 3.2.0-44.69 ProcVersionSignature: Ubuntu 3.2.0-44.69-generic 3.2.44 Uname: Linux 3.2.0-44-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: andre 1838 F.... pulseaudio CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf8ff8000 irq 45' Mixer name : 'Analog Devices AD1988B' Components : 'HDA:11d4198b,104381f6,00100200' Controls : 49 Simple ctrls : 26 Date: Mon Jul 22 22:47:20 2013 HibernationDevice: RESUME=UUID=5ff6e571-5a9f-4503-b785-11d535246217 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) IwConfig: lo no wireless extensions. eth1 no wireless extensions. eth0 no wireless extensions. MachineType: System manufacturer System Product Name MarkForUpload: True ProcEnviron: LANGUAGE=en_CA:en TERM=xterm PATH=(custom, no user) LANG=en_CA.UTF-8 SHELL=/bin/bash ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-44-generic root=UUID=8a71ba4a-d8d9-4fc8-9dc3-3df31bed8057 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-44-generic N/A linux-backports-modules-3.2.0-44-generic N/A linux-firmware 1.79.4 RfKill: SourcePackage: linux StagingDrivers: echo UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/30/2008 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1238 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P5B-Deluxe dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1238:bd09/30/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B-Deluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1203941/+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
