** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Description changed:
On my Dell Latitude E5520 (Sandy Bridge) a reboot always hangs while
shutting down. If I just shutdown the machine it works fine. This
happens with Precise 64 bit (x64) version: I used a daily build dated
16th april and applied all updates. The previous (Beta2) version was
showing the same issue, the 16th april build is showing the same issue,
before and after updates.
I also installed a 32 bit (x86) version on another partion and it does
work fine! So this bug is affecting 64 bit version only!
Upstream kernels I tested (3.2.15, 3.3, 3.4) do not fix this.
WORKAROUND: Type in a terminal "sudo nano /etc/default/grub"
find the line
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
and change it by adding the reboot=pci parameter
GRUB_CMDLINE_LINUX_DEFAULT="reboot=pci quiet splash"
then save your changes and perform a "sudo update-grub"
+
+ For further details, see post #25 below.
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu5
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu64 1745 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xd5440000 irq 47'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:111d76e7,1028049a,00100102
HDA:80862805,80860101,00100000'
Controls : 37
Simple ctrls : 13
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=37f6026f-41f9-4e0d-a7df-609be53a42a9
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120416)
MachineType: Dell Inc. Latitude E5520
Package: linux (not installed)
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=it_IT.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic
root=UUID=8ee772ed-c38d-43ff-b4aa-ceb821d7cde0 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
RelatedPackageVersions:
linux-restricted-modules-3.2.0-23-generic N/A
linux-backports-modules-3.2.0-23-generic N/A
linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
Tags: precise staging precise staging
Uname: Linux 3.2.0-23-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 11/30/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0KCT5J
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA05:bd11/30/2011:svnDellInc.:pnLatitudeE5520:pvr01:rvnDellInc.:rn0KCT5J:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5520
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
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https://bugs.launchpad.net/bugs/985471
Title:
Ubuntu precise (12.04) 64bit hang on reboot
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