Comment 0 for bug 499497

The system will power off fine when using the "poweroff" command, but when rebooting, it will hang when the machine is supposed to power-cycle.

adding the "reboot=pci" kernel boot option allows reboots work work normally.

ProblemType: Bug
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: NVidia [HDA NVidia], device 0: HDA Generic [HDA Generic]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 3468 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xd0480000 irq 22'
   Mixer name : 'Generic 1013 ID 4206'
   Components : 'HDA:10134206,106b4e00,00100301'
   Controls : 5
   Simple ctrls : 3
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xd0230000 irq 21'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100100'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined
   Playback channels: Mono
   Mono: Playback [off]
Date: Tue Dec 22 15:23:47 2009
DistroRelease: Ubuntu 9.10
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: Apple Inc. iMac10,1
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash reboot=pci --
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-14-generic N/A
 linux-firmware 1.24
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
Uname: Linux 2.6.31-14-generic x86_64
dmi.bios.date: 09/03/09
dmi.bios.vendor: Apple Inc.
dmi.bios.version: IM101.88Z.00CC.B00.0909031926
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F2268CC8
dmi.board.vendor: Apple Inc.
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 13
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F2268CC8
dmi.modalias: dmi:bvnAppleInc.:bvrIM101.88Z.00CC.B00.0909031926:bd09/03/09:svnAppleInc.:pniMac10,1:pvr1.0:rvnAppleInc.:rnMac-F2268CC8:rvr:cvnAppleInc.:ct13:cvrMac-F2268CC8:
dmi.product.name: iMac10,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.