Anyone using the backported kernels on Lucid? I'm seeing driver problems.

I have been trying the backported Maverick, Natty & Oneiric kernels on Lucid. The snag is that when installing Oneiric (linux-image-generic-lts-backport-oneiric) I see a bunch of errors about certain Realtek drivers not being installed, and when installing the Natty kernel (linux-image-generic-lts-backport-natty), I get similar ones about certain graphics drivers:

Selecting previously deselected package linux-image-generic-lts-backport-natty.
Unpacking linux-image-generic-lts-backport-natty (from .../linux-image-generic-lts-backport-natty_2.6.38.13.23_i386.deb) ...
Setting up linux-image-2.6.38-13-generic (2.6.38-13.57~lucid1) ...
Running depmod.
update-initramfs: Generating /boot/initrd.img-2.6.38-13-generic
W: Possible missing firmware /lib/firmware/radeon/SUMO_rlc.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/PALM_me.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/PALM_pfp.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/CAICOS_mc.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/CAICOS_me.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/CAICOS_pfp.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/TURKS_mc.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/TURKS_me.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/TURKS_pfp.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/BTC_rlc.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/BARTS_mc.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/BARTS_me.bin for module radeon
W: Possible missing firmware /lib/firmware/radeon/BARTS_pfp.bin for module radeon
Running postinst hook script /usr/sbin/update-grub.

Sure enough, the resultant system doesn't run correctly on a PC with an ATI graphics card and is stuck in 800*600.

Can anyone give me some pointers on how to resolve this?