Public bug reported: When booting (after kernel selection in grub2) the system is freezed. The screen became black and system seems freezed, but keyboard responds. Pressing Ctrl+Alt+F1 followed by Ctrl+Alt+F7 a stack dump will be showed. Please refer to the dmesg_from_boot_to_stack_dump.log for more informations.
The PC is an Acer TimeLineX 4820TG Ubuntu version is Natty Beta2 64 bits Problem is reproducible : 1/ WithOUT power supply cable plugged, power on the Acer TimeLineX 4820TG under Ubuntu Natty Beta2 64 bits 2/ Under the grub kernel selection, choose 2.6.38-8 3/ Login and choose shutdown 4/ After PLUG the power supply cable and switch on the laptop 5/ Under the grub kernel selection, choose 2.6.38-8 6/ The system will freeze some seconds later 7/ Pressing Ctrl+Alt+F1 followed by Ctrl+Alt+F7 show a stack dump. 8/ Unplug the power cable, press Alt+Syst+B to reboot. Problem will not happen Please note that at point 1/ if you switch on the machine with the power supply cable plugged, and at point 4/ unplug it, the problem will also happen! Feel free to contact me in order to make further test. It's a regression, the problem doesn't happen under the 2.6.38-7 kernel. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: linux-image-2.6.38-8-generic 2.6.38-8.42 Regression: Yes Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2 Uname: Linux 2.6.38-8-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: ALC271X Analog [ALC271X Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: marmotte 1584 F.... pulseaudio /dev/snd/pcmC0D0p: marmotte 1584 F...m pulseaudio CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xdc500000 irq 45' Mixer name : 'Realtek ALC271X' Components : 'HDA:10ec0269,10250359,00100100' Controls : 18 Simple ctrls : 10 Card1.Amixer.info: Card hw:1 'Generic'/'HD-Audio Generic at 0xdc420000 irq 46' Mixer name : 'ATI R6xx HDMI' Components : 'HDA:1002aa01,00aa0100,00100200' Controls : 4 Simple ctrls : 1 Card1.Amixer.values: Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Mon Apr 18 23:13:47 2011 HibernationDevice: RESUME=UUID=75d91426-30a5-4061-a210-0b4e39f9afd2 InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330) 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 004: ID 064e:a219 Suyin Corp. 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: Acer Aspire 4820TG ProcEnviron: LANGUAGE=fr:en LANG=fr_FR.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=0ee4047a-e5c0-4236-93bf-947913d3a984 ro quiet splash acpi_osi=Linux vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-2.6.38-8-generic N/A linux-backports-modules-2.6.38-8-generic N/A linux-firmware 1.50 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/16/2011 dmi.bios.vendor: INSYDE dmi.bios.version: V1.25 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: JM41_CP dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnINSYDE:bvrV1.25:bd03/16/2011:svnAcer:pnAspire4820TG:pvrV1.25:rvnAcer:rnJM41_CP:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: Aspire 4820TG dmi.product.version: V1.25 dmi.sys.vendor: Acer ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug kernel-graphics natty needs-upstream-testing regression-release running-unity -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/765216 Title: system freeze while booting if power conditions are not the same as at the shutdown -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs