Bug#539026: linux-image-2.6.30-1-686: agpgart module fails to initialize

[Andres Salomon <dilinger@collabora.co.uk>]

Package: linux-image-2.6.30-1-686
Version: 2.6.30-3

During boot, I see:

[    1.347047] Linux agpgart interface v0.103
[    1.366133] [drm] Initialized drm 1.1.0 20060810
[    1.378704] i915 0000:00:02.0: power state changed by ACPI to D0
[    1.378719] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    1.378726] i915 0000:00:02.0: setting latency timer to 64
[    1.378745] [drm:drm_fill_in_dev] *ERROR* Cannot initialize the agpgart module.
[    1.378807] DRM: Fill_in_dev failed.
[    1.378862] i915 0000:00:02.0: PCI INT A disabled
[    1.378870] i915: probe of 0000:00:02.0 failed with error -22

This is with the following /proc/cmdline:
root=/dev/sda1 ro quiet

And the following in /etc/initramfs-tools/modules:
i915 modeset=1

This is problematic because it breaks KMS.