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

[Woody Suwalski]

Rafael J. Wysocki wrote:
> 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.
>
>   
Len's patch idea does not work for me - if ACPI is build as a module, I 
have no way to force acpi-video to be built in.
And kernel with i915 built-in breaks...
So to summarize: acpi=m with i915=y is broken...

For now I am simply commenting-out the i915 acpi-video calls, but that 
is not a good way...
We need to move the core acpi-video to the main kernel...

Thanks, Woody

--
Woody Suwalski, Xandros, Ottawa, Canada, 1-613-842-3498 x414

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/