Re: [i915] Kernel does not compile when set to use i915 kernel mode-setting per default (CONFIG_DRM_I915_KMS=y)

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On Monday 18 May 2009, Randy Dunlap wrote:
> On Mon, 18 May 2009 21:01:06 +0200 Rafael J. Wysocki wrote:
> 
> > Adding CCs.
> > 
> > On Monday 18 May 2009, you wrote:
> > > (First post, so please CC to zorael@xxxxxxxxx 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?
> 
> 
> Len posted a patch for this.  It's below.
> Len, do you have this patch queued for Linus?

Ah, it's commit ecb4aed78dcf09e48c8c34c8c2fa7f5c69344be6, which went in
slightly after -rc6.  So it should be fixed.

Zorael, please test the current Linus' tree.

Thanks,
Rafael
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