[g43] (Needs intel-2.7) powertop wakeups 71.6 <interrupt> : i915@pci (UXA bug)

Binary package hint: xserver-xorg-video-intel

When running the latest Jaunty on a Lenovo X200 Thinkpad X4500 chipset I get a large number of wakeups in powertop using UXA .

I am using Kubuntu with compositing turned _off_. ( it occurs with it on as well ).
No desktop effects at all.

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Xorg.conf

Section "Device"
        Identifier "Configured Video Device"
EndSection

Section "Monitor"
        Identifier "Configured Monitor"
EndSection

Section "Screen"
        Identifier "Default Screen"
        Monitor "Configured Monitor"
        Device "Configured Video Device"
EndSection
Section "Device"
        Identifier "Configured Video Device"
        Driver "intel"
        Option "AccelMethod" "UXA"
        Option "NoDRI"
EndSection

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root@portland:~# lsmod
Module Size Used by
i915 65540 2
drm 96296 3 i915
ppdev 15620 0
bridge 56340 0
stp 10500 1 bridge
bnep 20224 2
input_polldev 11912 0
reiserfs 236288 1
btusb 19608 0
lp 17156 0
parport 42220 2 ppdev,lp
snd_hda_intel 435636 2
snd_pcm_oss 46336 0
snd_mixer_oss 22656 1 snd_pcm_oss
snd_pcm 82948 2 snd_hda_intel,snd_pcm_oss
arc4 9856 2
ecb 10752 2
snd_seq_dummy 10756 0
snd_seq_oss 37760 0
snd_seq_midi 14336 0
iwlagn 100228 0
iwlcore 93184 1 iwlagn
snd_rawmidi 29696 1 snd_seq_midi
snd_seq_midi_event 15104 2 snd_seq_oss,snd_seq_midi
snd_seq 56880 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 29704 2 snd_pcm,snd_seq
snd_seq_device 14988 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
mac80211 217208 2 iwlagn,iwlcore
thinkpad_acpi 66560 0
iTCO_wdt 19108 0
snd 62628 13 snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 15200 1 snd
intel_agp 34108 1
psmouse 61972 0
led_class 12036 2 iwlcore,thinkpad_acpi
iTCO_vendor_support 11652 1 iTCO_wdt
snd_page_alloc 16904 2 snd_hda_intel,snd_pcm
agpgart 42696 3 drm,intel_agp
cfg80211 38032 3 iwlagn,iwlcore,mac80211
video 25360 0
serio_raw 13316 0
pcspkr 10496 0
nvram 16396 1 thinkpad_acpi
output 11008 1 video
e1000e 121136 0
fbcon 46112 0
tileblit 10752 1 fbcon
font 16384 1 fbcon
bitblit 13824 1 fbcon
softcursor 9984 1 bitblit

******************************************************
root@portland:~# lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:03.0 Communication controller: Intel Corporation Mobile 4 Series Chipset MEI Controller (rev 07)
00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network Connection (rev 03)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection
***********************************************
root@portland:~# uname -a
Linux portland 2.6.28-11-generic #38-Ubuntu SMP Fri Mar 27 09:00:52 UTC 2009 i686 GNU/Linux

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Powertop
Cn Avg residency P-states (frequencies)
C0 (cpu running) ( 6.8%) 2.27 Ghz 11.2%
polling 0.0ms ( 0.0%) 2.27 Ghz 0.0%
C1 mwait 0.0ms ( 0.0%) 1.60 Ghz 0.4%
C2 mwait 0.1ms ( 0.0%) 800 Mhz 88.5%
C6 mwait 5.6ms (93.2%)

Wakeups-from-idle per second : 171.8 interval: 15.0s
Power usage (ACPI estimate): 11.8W (4.2 hours)

Top causes for wakeups:
  37.5% ( 73.5) <interrupt> : i915@pci:0000:00:02.0
  23.8% ( 46.7) <interrupt> : PS/2 keyboard/mouse/touchpad
  13.7% ( 26.9) <kernel IPI> : Rescheduling interrupts
   7.1% ( 13.9) <interrupt> : iwlagn
   5.2% ( 10.2) <interrupt> : extra timer interrupt
   2.4% ( 4.8) konqueror : schedule_hrtimeout_range (hrtimer_wakeup)
   1.5% ( 3.0) knotify4 : schedule_hrtimeout_range (hrtimer_wakeup)
   1.0% ( 2.0) mysqld : schedule_hrtimeout_range (hrtimer_wakeup)