Karmic hogs my CPU

[lgc]

Hi,

Ever since I updated to Karmic, I experience recurrent CPU hogging even right after a fresh start, with Xorg taking up about 70% of the load, according to "top". My machine seems not a candidate to install lm-sensors (sensors-detect detects none of them) and I've already tried to modify menu.lst by adding the "acpi_enforce_resources=lax" to the "kopt..." line, as suggested elsewhere, to no avail.

Let me end up by saying that, even though my machine starts at close to 100% usage at 2GHz, it is not infrequent that, perhaps after a few suspend events (how it arrives at this is not clear to me) it'll return to "normal" usage (800 MHz and ~67% usage). But every time it boots it's always going full-power.

Thank you for your help.

If it's of any use, I am enclosing the (what seems to me) relevant part of "lshw" output:

  description: Portable Computer
    product: Inspiron 6000
    vendor: Dell Inc.
    serial: GFCXL71
    width: 32 bits
    capabilities: smbios-2.3 dmi-2.3
    configuration: boot=normal chassis=portable uuid=44454C4C-4600-1043-8058-C7C04F4C3731
  *-core
       description: Motherboard
       product: 0W9260
       vendor: Dell Inc.
       physical id: 0
       serial: .GFCXL71.CN129615577072.
     *-firmware
          description: BIOS
          vendor: Dell Inc.
          physical id: 0
          version: A09 (09/28/2005)
          size: 64KiB
          capacity: 512KiB
          capabilities: isa pci pcmcia pnp upgrade shadowing cdboot bootselect int13floppy720 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp smartbattery biosbootspecification netboot
     *-cpu
          description: CPU
          product: Intel(R) Pentium(R) M processor 2.00GHz
          vendor: Intel Corp.
          physical id: 400
          bus info: cpu@0
          version: 6.13.8
          slot: Microprocessor
          size: 2GHz
          capacity: 2GHz
          width: 32 bits
          clock: 133MHz
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up bts est tm2 cpufreq
        *-cache:0
             description: L1 cache
             physical id: 700
             size: 8KiB
             capacity: 8KiB
             capabilities: internal write-back data
        *-cache:1
             description: L2 cache
             physical id: 701
             size: 2MiB
             capacity: 2MiB
             clock: 66MHz (15.0ns)
             capabilities: pipeline-burst internal varies unified
     *-memory
          description: System Memory
          physical id: 1000
          slot: System board or motherboard
          size: 2GiB
        *-bank:0
             description: DIMM DDR Synchronous 533 MHz (1.9 ns)
             vendor: 7F7F7F7FCB000000
             physical id: 0
             serial: 00000000
             slot: DIMM_A
             size: 1GiB
             width: 64 bits
             clock: 533MHz (1.9ns)
        *-bank:1
             description: DIMM DDR Synchronous 533 MHz (1.9 ns)
             vendor: 7F98000000000000
             physical id: 1
             serial: 6539B677
             slot: DIMM_B
             size: 1GiB
             width: 64 bits
             clock: 533MHz (1.9ns)