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