Public bug reported: Starting with 2.6.38-rc1 I see a boot time increase of almost 50%. The boot charts show two processes in an unusual long uninterruptible sleep state: plymouthd and kworker/*:* (see attached images). It's happening with a Nvidia GPU as well as with an on-die Intel HD GPU (hybrid graphics solution in a ThinkPad T510).
Bisecting the kernel between 2.6.37 and 2.6.38-rc1 showed this merge as first bad commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=23d69b09b78c4876e134f104a3814c30747c53f1 (I have yet to find the problematic commit within that merge.) ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: linux-image-2.6.38-4-generic 2.6.38-4.31 Regression: Yes Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.38-4.31-generic 2.6.38-rc5 Uname: Linux 2.6.38-4-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. Architecture: amd64 ArecordDevices: **** 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: sirius 1330 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf2600000 irq 43' Mixer name : 'Intel IbexPeak HDMI' Components : 'HDA:14f15069,17aa218b,00100302 HDA:80862804,17aa21b5,00100000' Controls : 12 Simple ctrls : 6 Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6MHT42WW-1.17' Mixer name : 'ThinkPad EC 6MHT42WW-1.17' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Fri Feb 18 17:51:20 2011 HibernationDevice: RESUME=UUID=c70ee7d5-a3aa-40bc-9625-a297c3c1eea2 InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110112) Lsusb: Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 4349WK7 ProcEnviron: LANGUAGE=en_US:en PATH=(custom, user) LANG=en_US.UTF-8 LC_MESSAGES=en_US.utf8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-4-generic root=UUID=755daaa3-ddf9-4451-ad6d-2b5354cee2c2 ro quiet splash elevator=deadline bootchart=disable vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-2.6.38-4-generic N/A linux-backports-modules-2.6.38-4-generic N/A linux-firmware 1.47 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux dmi.bios.date: 09/29/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6MET75WW (1.35 ) dmi.board.name: 4349WK7 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:bvr6MET75WW(1.35):bd09/29/2010:svnLENOVO:pn4349WK7:pvrThinkPadT510:rvnLENOVO:rn4349WK7:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4349WK7 dmi.product.version: ThinkPad T510 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug kernel-uncat natty needs-upstream-testing regression-release unity-2d -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/721389 Title: Boot time regression 2.6.38 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
