Kernel:
2.6.38-10-generic #44-Ubuntu SMP Thu Jun 2 21:32:22 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
     
PowerTOP version 1.13      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.0%)       Turbo Mode     0.3%
polling           0.0ms ( 0.0%)         1.60 Ghz     0.0%
C1 mwait          0.1ms ( 0.0%)         1466 Mhz     0.0%
C2 mwait          0.7ms ( 0.1%)         1199 Mhz     0.0%
C3 mwait         20.3ms (106.7%)         933 Mhz    99.6%

Wakeups-from-idle per second : 54.2     interval: 1.4s
Power usage (ACPI estimate): 1.4W (2.9 hours)

Top causes for wakeups:
  40.4% ( 86.0)   [fglrx[0]@PCI:2:0:0] <interrupt>
  24.9% ( 53.0)   [iwlagn] <interrupt>
   7.0% ( 15.0)   gwibber-service
   6.6% ( 14.0)   ubuntuone-syncd
   5.6% ( 12.0)   kworker/0:1
   3.3% (  7.0)   syndaemon
   2.3% (  5.0)   [ahci] <interrupt>
   1.4% (  3.0)   [kernel core] hrtimer_start (tick_sched_timer)
   1.4% (  3.0)   kworker/u:5
   0.9% (  2.0)   PS/2 keyboard/mouse/touchpad interrupt
   0.9% (  2.0)   [kernel scheduler] Load balancing tick
   0.9% (  2.0)   kworker/u:4
   0.5% (  1.0)   kworker/0:0
   0.5% (  1.0)   wpa_supplicant
   0.5% (  1.0)   rtkit-daemon
   0.5% (  1.0)   NetworkManager
   0.5% (  1.0)   udisks-daemon
   0.5% (  1.0)   compiz
   0.5% (  1.0)   ssh-agent
   0.5% (  1.0)   rs:main
   0.5% (  1.0)   gnome-terminal
_______________________________________________________________________________________________________________
kernel 2.6.38-9-generic #43lp760131v201106060906 SMP Mon Jun 6 08:27:00 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

PowerTOP version 1.13      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 3.6%)       Turbo Mode     3.3%
polling           0.0ms ( 0.0%)         1.60 Ghz     0.0%
C1 mwait          0.1ms ( 0.0%)         1466 Mhz     0.0%
C2 mwait          1.1ms ( 0.2%)         1066 Mhz     0.2%
C3 mwait         25.8ms (96.2%)          933 Mhz    96.5%

Wakeups-from-idle per second : 39.5     interval: 3.0s
Power usage (ACPI estimate): 2.2W (1.8 hours)

Top causes for wakeups:
  25.2% ( 29.3)   [iwlagn] <interrupt>
  25.2% ( 29.3)   kworker/0:1
  10.0% ( 11.7)   [kernel scheduler] Load balancing tick
   8.6% ( 10.0)   ubuntuone-syncd
   8.6% ( 10.0)   gwibber-service
   7.2% (  8.3)   kworker/0:0
   4.3% (  5.0)   syndaemon
   3.2% (  3.7)   [ahci] <interrupt>
   1.1% (  1.3)   [kernel core] hrtimer_start (tick_sched_timer)
   0.9% (  1.0)   kworker/u:4
   0.9% (  1.0)   kworker/u:6
   0.6% (  0.7)   [Function call interrupts] <kernel IPI>
   0.6% (  0.7)   udisks-daemon
   0.6% (  0.7)   avahi-daemon
   0.3% (  0.3)   PS/2 keyboard/mouse/touchpad interrupt
   0.3% (  0.3)   [Rescheduling interrupts] <kernel IPI>
   0.3% (  0.3)   gnome-terminal
   0.3% (  0.3)   Xorg
   0.3% (  0.3)   upowerd
   0.3% (  0.3)   gconfd-2
   0.3% (  0.3)   ssh-agent

________________________________________________________________________________________
kernel 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

PowerTOP version 1.13      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 3.5%)       Turbo Mode     0.6%
polling           0.0ms ( 0.0%)         1.60 Ghz     0.0%
C1 mwait          0.1ms ( 0.1%)         1466 Mhz     0.0%
C2 mwait          0.8ms ( 0.4%)         1199 Mhz     0.0%
C3 mwait         26.9ms (96.0%)          933 Mhz    99.3%

Wakeups-from-idle per second : 50.6     interval: 3.0s
Power usage (ACPI estimate): 2.2W (1.7 hours)

Top causes for wakeups:
  31.6% ( 30.0)   [iwlagn] <interrupt>
  16.1% ( 15.3)   kworker/0:1
  10.5% ( 10.0)   gwibber-service
  10.2% (  9.7)   ubuntuone-syncd
   5.6% (  5.3)   kworker/0:0
   5.3% (  5.0)   [kernel scheduler] Load balancing tick
   5.3% (  5.0)   syndaemon
   3.5% (  3.3)   [ahci] <interrupt>
   2.1% (  2.0)   [Rescheduling interrupts] <kernel IPI>
   1.4% (  1.3)   [Function call interrupts] <kernel IPI>
   1.1% (  1.0)   gnome-power-man
   1.1% (  1.0)   avahi-daemon
   1.1% (  1.0)   kworker/u:6
   1.1% (  1.0)   kworker/u:3
   0.7% (  0.7)   [acpi] <interrupt>
   0.7% (  0.7)   gnome-terminal
   0.7% (  0.7)   [kernel core] hrtimer_start (tick_sched_timer)
   0.7% (  0.7)   udisks-daemon
   0.4% (  0.3)   update-notifier
   0.4% (  0.3)   Xorg
   0.4% (  0.3)   [kernel core] sk_reset_timer (tcp_write_timer)
__________________________________________________________________________________

kernel 2.6.34-020634-generic #020634 SMP Mon May 17 19:27:49 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
     
PowerTOP version 1.13      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 0.3%)       Turbo Mode     0.5%
polling           0.0ms ( 0.0%)         1.60 Ghz     0.0%
C1 mwait          0.7ms ( 0.2%)         1333 Mhz     0.0%
C2 mwait          1.5ms ( 0.1%)         1066 Mhz     0.0%
C3 mwait         18.3ms (99.5%)          933 Mhz    99.5%

Wakeups-from-idle per second : 57.7     interval: 15.0s
Power usage (ACPI estimate): 1.5W (1.9 hours) (long term: 1.6W,/1.7h)

Top causes for wakeups:
  30.8% ( 59.9)   [fglrx[0]@PCI:2:0:0] <interrupt>
  22.9% ( 44.5)   [iwlagn] <interrupt>
  15.2% ( 29.7)   [kernel scheduler] Load balancing tick
   8.5% ( 16.6)   compiz
   6.8% ( 13.2)   [extra timer interrupt]
   5.1% ( 10.0)   gwibber-service
   5.1% (  9.9)   ubuntuone-syncd
   2.6% (  5.0)   syndaemon
   1.1% (  2.1)   [kernel core] hrtimer_start (tick_sched_timer)
   1.0% (  2.0)   [kernel core] clocksource_watchdog (clocksource_watchdog)
   0.1% (  0.3)   gnome-settings-
   0.1% (  0.2)   NetworkManager
   0.1% (  0.2)   update-notifier
   0.1% (  0.1)   preload
   0.1% (  0.1)   rtkit-daemon
   0.1% (  0.1)   ssh-agent
   0.1% (  0.1)   gnome-power-man
   0.1% (  0.1)   [kernel core] start_rt_bandwidth (sched_rt_period_timer)
   0.1% (  0.1)   [kernel core] add_timer (sta_info_cleanup)
   0.0% (  0.1)   [Rescheduling interrupts] <kernel IPI>
   0.0% (  0.1)   [kernel core] rtl8169_phy_timer (rtl8169_phy_timer)
   0.0% (  0.1)   rsyslogd
   0.0% (  0.1)   wpa_supplicant
   0.0% (  0.1)   irqbalance
   0.0% (  0.1)   [kernel core] ieee80211_sta_rx_notify (ieee80211_sta_conn_mon_timer)
________________________________________________________________________________________

kernel 2.6.32-0206324118-generic #201105261442 SMP Thu May 26 14:46:08 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux    

PowerTOP version 1.13      (C) 2007 Intel Corporation

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        (26.3%)       Turbo Mode    25.2%
polling           0.0ms ( 0.0%)         1333 Mhz     0.0%
C1 mwait          1.0ms ( 3.3%)         1199 Mhz     0.0%
C3 mwait         16.2ms (70.4%)         1066 Mhz     0.0%
                                         933 Mhz    74.8%

Wakeups-from-idle per second : 76.7     interval: 15.0s
Power usage (ACPI estimate): 4.1W (0.5 hours)

Top causes for wakeups:
  67.5% (311.2)   [     0] [kernel scheduler] Load balancing tick
  13.0% ( 59.9)   [      ] [fglrx[0]@PCI:2:0:0] <interrupt>
  12.0% ( 55.5)   [      ] [TLB shootdowns] <kernel IPI>
   2.2% ( 10.0)   [  3769] gwibber-service
   2.1% (  9.9)   [  3775] ubuntuone-syncd
   1.1% (  5.0)   [  2495] syndaemon
   0.8% (  3.7)   [      ] [ahci] <interrupt>
   0.4% (  2.0)   [     0] [kernel core] clocksource_watchdog (clocksource_watchdog)
   0.3% (  1.3)   [     0] [kernel core] hrtimer_start (tick_sched_timer)
   0.1% (  0.6)   [  2500] udisks-daemon
   0.1% (  0.3)   [      ] [Rescheduling interrupts] <kernel IPI>
   0.1% (  0.3)   [  2449] compiz
   0.1% (  0.3)   [  2432] gnome-settings-
   0.0% (  0.2)   [  4540] update-notifier
   0.0% (  0.2)   [     1] [kernel core] start_rt_bandwidth (sched_rt_period_timer)
   0.0% (  0.1)   [  2414] ssh-agent
   0.0% (  0.1)   [  2453] gnome-power-man
   0.0% (  0.1)   [  2259] rtkit-daemon
   0.0% (  0.1)   [  1415] preload
   0.0% (  0.1)   [      ] [firewire_ohci] <interrupt>
   0.0% (  0.1)   [     0] [kernel core] add_timer (sta_info_cleanup)
   0.0% (  0.1)   [     7] ksoftirqd/1
   0.0% (  0.1)   [  1107] rsyslogd
   0.0% (  0.1)   [  1309] irqbalance