Problema: Ubuntu 9.10 não desliga o PC

[crixtiano]

Instalei o Ubuntu 9.10 em uma máquina antiga. Mas estou com um problema, ao dar shutdown, o Ubuntu não desliga o PC.

Antes essa mesma maquina tinha o Ubuntu 7.alguma_coisa, e eu me lembro vagamente que para driblar esse problema eu alterei a linha de comando da inicializacao do Kernal no arquivo menu.lst. Mas nem lembro do comando que eu adicionei e nem consigo achar o arquivo "menu.lst" nessa noda versao do Ubuntu.

Alguém poderia me ajudar a resolver esse problema? Apenas para fins de conferencia, segue as especificacoes da minha maquina abaixo:

zezinho
    description: Desktop Computer
    product: M825G
    vendor: ECS
    version: 1.0
    serial: 00000000
    width: 32 bits
    capabilities: smbios-2.3 dmi-2.3 smp-1.4 smp
    configuration: chassis=desktop cpus=1
  *-core
       description: Motherboard
       product: M825G
       vendor: ECS
       physical id: 0
       version: 1.0
       serial: 00000000
     *-firmware
          description: BIOS
          vendor: American Megatrends Inc.
          physical id: 0
          version: Version 07.00T (04/02/01)
          size: 64KiB
          capacity: 192KiB
          capabilities: isa pci pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int17printer int10video acpi usb agp ls120boot zipboot biosbootspecification
     *-cpu
          description: CPU
          product: AMD Duron(tm)
          vendor: Advanced Micro Devices [AMD]
          physical id: 4
          bus info: cpu@0
          version: 6.8.1
          slot: Socket-A
          size: 1600MHz
          capacity: 3GHz
          width: 32 bits
          clock: 133MHz
          capabilities: boot fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow up
        *-cache:0
             description: L1 cache
             physical id: 5
             slot: Internal Cache
             size: 128KiB
             capacity: 1MiB
             capabilities: synchronous internal write-back unified
        *-cache:1
             description: L2 cache
             physical id: 6
             slot: Internal Cache
             size: 64KiB
             capacity: 1MiB
             capabilities: synchronous internal write-back unified
     *-memory
          description: System memory
          physical id: 1
          size: 1247MiB
     *-pci
          description: Host bridge
          product: VT8378 [KM400/A] Chipset Host Bridge
          vendor: VIA Technologies, Inc.
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 00
          width: 32 bits
          clock: 66MHz
          configuration: driver=agpgart-via latency=8
          resources: irq:0 memory:e0000000-e3ffffff(prefetchable)
        *-pci
             description: PCI bridge
             product: VT8237/VX700 PCI Bridge
             vendor: VIA Technologies, Inc.
             physical id: 1
             bus info: pci@0000:00:01.0
             version: 00
             width: 32 bits
             clock: 66MHz
             capabilities: pci pm bus_master cap_list
             resources: memory:dde00000-dfefffff memory:d5d00000-ddcfffff(prefetchable)
           *-display UNCLAIMED
                description: VGA compatible controller
                product: KM400/KN400/P4M800 [S3 UniChrome]
                vendor: VIA Technologies, Inc.
                physical id: 0
                bus info: pci@0000:01:00.0
                version: 01
                width: 32 bits
                clock: 66MHz
                capabilities: pm agp agp-2.0 bus_master cap_list
                configuration: latency=32 mingnt=2
                resources: memory:d8000000-dbffffff(prefetchable) memory:de000000-deffffff memory:dfef0000-dfefffff(prefetchable)
        *-usb:0
             description: USB Controller
             product: VT82xxxxx UHCI USB 1.1 Controller
             vendor: VIA Technologies, Inc.
             physical id: 8
             bus info: pci@0000:00:08.0
             version: 62
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=uhci_hcd latency=32
             resources: irq:16 ioport:e800(size=32)
        *-usb:1
             description: USB Controller
             product: VT82xxxxx UHCI USB 1.1 Controller
             vendor: VIA Technologies, Inc.
             physical id: 8.1
             bus info: pci@0000:00:08.1
             version: 62
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=uhci_hcd latency=32
             resources: irq:17 ioport:ec00(size=32)
        *-usb:2
             description: USB Controller
             product: USB 2.0
             vendor: VIA Technologies, Inc.
             physical id: 8.2
             bus info: pci@0000:00:08.2
             version: 65
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=ehci_hcd latency=32
             resources: irq:18 memory:dfffff00-dfffffff
        *-usb:3
             description: USB Controller
             product: VT82xxxxx UHCI USB 1.1 Controller
             vendor: VIA Technologies, Inc.
             physical id: 10
             bus info: pci@0000:00:10.0
             version: 80
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=uhci_hcd latency=32
             resources: irq:21 ioport:dc00(size=32)
        *-usb:4
             description: USB Controller
             product: VT82xxxxx UHCI USB 1.1 Controller
             vendor: VIA Technologies, Inc.
             physical id: 10.1
             bus info: pci@0000:00:10.1
             version: 80
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=uhci_hcd latency=32
             resources: irq:21 ioport:e000(size=32)
        *-usb:5
             description: USB Controller
             product: VT82xxxxx UHCI USB 1.1 Controller
             vendor: VIA Technologies, Inc.
             physical id: 10.2
             bus info: pci@0000:00:10.2
             version: 80
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=uhci_hcd latency=32
             resources: irq:21 ioport:e400(size=32)
        *-usb:6
             description: USB Controller
             product: USB 2.0
             vendor: VIA Technologies, Inc.
             physical id: 10.3
             bus info: pci@0000:00:10.3
             version: 82
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=ehci_hcd latency=32
             resources: irq:21 memory:dffffe00-dffffeff
        *-isa
             description: ISA bridge
             product: VT8235 ISA Bridge
             vendor: VIA Technologies, Inc.
             physical id: 11
             bus info: pci@0000:00:11.0
             version: 00
             width: 32 bits
             clock: 33MHz
             capabilities: isa pm bus_master cap_list
             configuration: latency=0
        *-ide
             description: IDE interface
             product: VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE
             vendor: VIA Technologies, Inc.
             physical id: 11.1
             bus info: pci@0000:00:11.1
             logical name: scsi0
             version: 06
             width: 32 bits
             clock: 33MHz
             capabilities: ide pm bus_master cap_list emulated
             configuration: driver=pata_via latency=32
             resources: irq:255 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:fc00(size=16)
           *-disk
                description: ATA Disk
                product: SAMSUNG SP0842N
                physical id: 0.0.0
                bus info: scsi@0:0.0.0
                logical name: /dev/sda
                version: BH10
                serial: S0JQJ56P404439
                size: 74GiB (80GB)
                capabilities: partitioned partitioned:dos
                configuration: ansiversion=5 signature=000b7e24
              *-volume:0
                   description: EXT4 volume
                   vendor: Linux
                   physical id: 1
                   bus info: scsi@0:0.0.0,1
                   logical name: /dev/sda1
                   logical name: /
                   version: 1.0
                   serial: 6dcb1bb3-eb28-49ae-8b67-afc1b7fe912c
                   size: 73GiB
                   capacity: 73GiB
                   capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
                   configuration: created=2009-12-11 06:10:58 filesystem=ext4 lastmountpoint=/�O&���o�U�������~��9Z� b�� b����o��~���~���\���o�p�%� modified=2009-12-13 19:08:03 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,barrier=1,data=ordered mounted=2009-12-13 19:08:03 state=mounted
              *-volume:1
                   description: Extended partition
                   physical id: 2
                   bus info: scsi@0:0.0.0,2
                   logical name: /dev/sda2
                   size: 1435MiB
                   capacity: 1435MiB
                   capabilities: primary extended partitioned partitioned:extended
                 *-logicalvolume
                      description: Linux swap / Solaris partition
                      physical id: 5
                      logical name: /dev/sda5
                      capacity: 1435MiB
                      capabilities: nofs
        *-multimedia
             description: Multimedia audio controller
             product: VT8233/A/8235/8237 AC97 Audio Controller
             vendor: VIA Technologies, Inc.
             physical id: 11.5
             bus info: pci@0000:00:11.5
             version: 50
             width: 32 bits
             clock: 33MHz
             capabilities: pm cap_list
             configuration: driver=VIA 82xx Audio latency=0
             resources: irq:22 ioport:d400(size=256)
        *-communication
             description: Communication controller
             product: AC'97 Modem Controller
             vendor: VIA Technologies, Inc.
             physical id: 11.6
             bus info: pci@0000:00:11.6
             version: 80
             width: 32 bits
             clock: 33MHz
             capabilities: pm cap_list
             configuration: driver=VIA 82xx Modem latency=0
             resources: irq:22 ioport:d800(size=256)
        *-network
             description: Ethernet interface
             product: VT6102 [Rhine-II]
             vendor: VIA Technologies, Inc.
             physical id: 12
             bus info: pci@0000:00:12.0
             logical name: eth0
             version: 74
             serial: 00:0d:87:ec:c2:f6
             size: 100MB/s
             capacity: 100MB/s
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
             configuration: autonegotiation=on broadcast=yes driver=via-rhine driverversion=1.4.3 duplex=full ip=192.168.1.121 latency=32 link=yes maxlatency=8 mingnt=3 multicast=yes port=MII speed=100MB/s
             resources: irq:23 ioport:d000(size=256) memory:dffffd00-dffffdff

Obrigado!


Cristiano