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Ever since I upgraded to 11.04, I have been unable to shutdown my computer.

I tried using :

shutdown now, poweroff, and halt. But they don't work! The only one that does is reboot.

Here is the output of running lspci in terminal.

00:00.0 Host bridge: Intel Corporation Core Processor DMI (rev 11)
00:03.0 PCI bridge: Intel Corporation Core Processor PCI Express Root Port 1 (rev 11)
00:08.0 System peripheral: Intel Corporation Core Processor System Management Registers (rev 11)
00:08.1 System peripheral: Intel Corporation Core Processor Semaphore and Scratchpad Registers (rev 11)
00:08.2 System peripheral: Intel Corporation Core Processor System Control and Status Registers (rev 11)
00:08.3 System peripheral: Intel Corporation Core Processor Miscellaneous Registers (rev 11)
00:10.0 System peripheral: Intel Corporation Core Processor QPI Link (rev 11)
00:10.1 System peripheral: Intel Corporation Core Processor QPI Routing and Protocol Registers (rev 11)
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05)
00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05)
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 IDE interface: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA IDE Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
00:1f.5 IDE interface: Intel Corporation 5 Series/3400 Series Chipset 2 port SATA IDE Controller (rev 05)
01:00.0 VGA compatible controller: nVidia Corporation G94 [GeForce 9600 GT] (rev a1)
02:00.0 SATA controller: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller (rev 02)
02:00.1 IDE interface: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller (rev 02)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
04:00.0 SATA controller: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller (rev 03)
04:00.1 IDE interface: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller (rev 03)
05:03.0 Multimedia controller: Philips Semiconductors SAA7130 Video Broadcast Decoder (rev 01)
05:04.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 43)
05:05.0 Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 02)

Does anyone know what happened? Thank you!

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2  
What does actually happen when you try sudo shutdown -P now? –  htorque May 5 '11 at 10:59
    
Have a look at the log files (system settings->system->log file viewer) and see if there is any errors during shutdown (syslog) or check dmesg| more or dmesg|tail 100 (last 100 records). If there are any error please add them to your question. –  Rinzwind May 5 '11 at 11:02
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2 Answers

you could try:

sudo init 0

hth, marc

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thank u for replying,it could run ,but it stopped,when it printed system halted .that means init 0 does not work! so I am thinking about maybe it is my showcard driver error,because before i installed my show card drvier ,it was ok . –  Hongyu Ye May 5 '11 at 15:06
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man shutdown

May help

Or try

shutdown --help

This will give you all the parameters for shutting down. I think an extra letter needs to be added to ensure the power is turned off after the operating system closes.

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=_=! sorry, I know how to use command shutdown –  Hongyu Ye May 5 '11 at 14:59
    
@Hongyu Ye - On older systems, shutting down the computer didn't actually power it off (I remember having a system that had a switch not unlike the ones you find on power supplies), so telling an OS to shutdown doesn't necessarily power off the machine. –  Shauna May 5 '11 at 18:26
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