From mboxrd@z Thu Jan  1 00:00:00 1970
From: Len Brown <lenb@kernel.org>
Subject: Re: 2.6.30-rc3 : Regression: i915 , video
Date: Thu, 23 Apr 2009 15:48:46 -0400 (EDT)
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> 
> Problems on MSI U100 laptop:
> 
> root@werner:~# modprobe i915
> WARNING: Error inserting video (/lib/modules/2.6.30-rc3/kernel/drivers/acpi/video.ko): No such device
> FATAL: Error inserting i915 (/lib/modules/2.6.30-rc3/kernel/drivers/gpu/drm/i915/i915.ko): Unknown symbol in module, or unknown parameter (see dmesg)
> root@werner:~#
> 
> Apr 23 16:16:57 localhost kernel: i915: Unknown symbol acpi_video_register
> 
> 
> On older kernels this drivers worked
> 
> Werner Landgraf
> Linux  SYS

you've got modular i915 and no acpi video driver?
Does this patch help?

http://patchwork.kernel.org/patch/18420/

thanks,
-Len Brown, Intel Open Source Technology Center