Public bug reported: I observed this problem for the first time when I compiled and installed linux 3.2.1 on Ubuntu 11.04.
This is the problem (what happens step by step): - I reboot the computer (from Ubuntu) - the system shuts down correctly - the fan stops - the fan restarts - some seconds go by (when the manufacturer's name - the bios - should appear) - the computer is powered off after a sharp sound (as if I used the power button) - some seconds go by - the computer is automatically turned on and everything goes right - the last step doesn't happen if the supply if from the battery (the computer never turns on by itself) I then tried Ubuntu 11.10 and now Ubuntu 12.04 (beta 1): the problem is still the same. I also tried the latest kernel development version from "http://kernel.ubuntu.com/~kernel-ppa/mainline/": linux 3.3. The problem is still the same. I read "https://wiki.ubuntu.com/BIOSandUbuntu"; and I used the "reboot=<letter>" parameter to change reboot method: I tried with "a" and "p" but the problem was still the same; "reboot=b" (BIOS) resolved the problem. On Ubuntu 11.04 I found out this: - last linux version without the problem: 2.6.39 - first linux version with the problem: 3.0.0 This is description of the system from which I'm reporting the bug (and which is affected by the bug): Hardware ------------- Model: Acer Aspire 1810TZ Motherboard: JM11-MS BIOS ------- Vendor: INSYDE Version: v1.3314 (the latest version) Release Date: 08/31/2010 ROM Size: 2048 kB Operative System ---------------- Description: Ubuntu precise (development branch) Release: 12.04 Kernel ---------- 3.2.0-20-generic-pae (the whole 3.x.x series seems to be affected by the bug) Most of these pieces of information should be avaiable in the attachments. Please let me know if more detalis or other command's outputs are needed. Thank you for the help! ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-20-generic-pae 3.2.0-20.32 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic-pae 3.2.12 Uname: Linux 3.2.0-20-generic-pae i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.95-0ubuntu1 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lorenzo 1658 F.... pulseaudio Date: Sun Mar 25 20:04:56 2012 HibernationDevice: RESUME=UUID=8454997e-892a-4b53-876c-ccfea678074a InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301) MachineType: Acer Aspire 1810TZ ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=it_IT.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic-pae root=UUID=834c4fb1-e775-4492-ac70-caa36a4c18fd ro quiet splash vt.handoff=7 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/31/2010 dmi.bios.vendor: INSYDE dmi.bios.version: v1.3314 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: JM11-MS dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 1 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnINSYDE:bvrv1.3314:bd08/31/2010:svnAcer:pnAspire1810TZ:pvrv1.3314:rvnAcer:rnJM11-MS:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion: dmi.product.name: Aspire 1810TZ dmi.product.version: v1.3314 dmi.sys.vendor: Acer ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/964687 Title: reboot problem using linux 3.x.x To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/964687/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
