[Intel-gfx] udev eats cpu on ubuntu

[Alexander E. Patrakov]

On my Ubuntu 10.04 desktop at work (kernel: 2.6.32-22-generic), udev
eats too much CPU (7%). That's with a Firefox with a few tabs (including
one with a flash-based web radio), Evolution, Gnome-Terminal and gedit,
without desktop effects. I haven't noticed anything similar with my home
Gentoo desktop with 2.6.33 or 2.6.34. Indeed, on Ubuntu there are
numerous uevents of the following form:

KERNEL[1275042009.722819]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [1275042009.725124]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[1275042009.730457]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [1275042009.734400]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[1275042009.737680]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [1275042009.739817]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[1275042009.741557]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [1275042009.745474]
change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)

What's the purpose of these events?

The card is:

00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset
Integrated Graphics Controller (rev 03)

00:02.0 0300: 8086:2e32 (rev 03)

-- 
Alexander E. Patrakov