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SubjectRe: [i915] Kernel does not compile when set to use i915 kernel mode-setting per default (CONFIG_DRM_I915_KMS=y)
Date
Adding CCs.

On Monday 18 May 2009, you wrote:
> (First post, so please CC to zorael@gmail.com in case it doesn't automatically.)
>
>
> I'm trying to compile 2.6.30-rc6 to enable kernel mode-setting *per
> default*, for my Intel 945GME video chipset. Alas, when compiling, it
> halts with the following tidbit:
>
> ...
> LD .tmp_vmlinux1
> drivers/built-in.o: In function `intel_opregion_free':
> /usr/src/linux/drivers/gpu/drm/i915/i915_opregion.c:422: undefined
> reference to `acpi_video_exit'
> drivers/built-in.o: In function `intel_opregion_init':
> /usr/src/linux/drivers/gpu/drm/i915/i915_opregion.c:393: undefined
> reference to `acpi_video_register'
> make[1]: *** [.tmp_vmlinux1] Error 1
> make[1]: Leaving directory `/usr/src/linux-2.6.29'
> make: *** [debian/stamp/build/kernel] Error 2
>
>
> grepping acpi_video_register recursively I see it's defined as an
> empty function in ./include/acpi/video.h, and as a more proper
> function in ./drivers/acpi/video.c. Does somehow setting it to use KMS
> per default via CONFIG_DRM_I915_KMS=y stop it from reading those
> files?
>
> I used to run with KMS by default in the early -30rc*s, but at some
> point (rc2?), it stopped compiling succesfully. If I don't enable it
> per default, it *does* compile, though I don't know how to explicitly
> enable it at boot-time. So I'm living without KMS for the time being.
> Woe.
>
> Anything obvious I'm doing wrong?
>
> -- Zorael


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