https://bugzilla.kernel.org/show_bug.cgi?id=66501

--- Comment #24 from Aaron Lu <aaron...@intel.com> ---
(In reply to Guillaume Millet from comment #23)
> Well, I'm lost. After adding some printk without any change, I deleted the
> module video.ko just to check if it is used... no change, the system works
> the same. On the other end, the kernel package installed video.ko and
> CONFIG_ACPI_VIDEO=m is present in /boot/config-3.13.0-031300-generic,
> doesn't it mean that video is a loadable module?
> 
> Moreover, lsmod displays an entry video:
> video                  19859  1 i915
> whereas $ modprobe video
> FATAL: Module video not found.
> 
> Where does that video module listed by lsmod comes from?

Maybe from initrd.

> 
> Could the problem be related to the bug in drm module which logs a trace in
> dmesg, starting with [drm:intel_pipe_config_compare] *ERROR* mismatch in
> gmch_pfit.lvds_border_bits (expected 32768, found 0)?

Not sure about the drm driver.

Could you just build the entire kernel tree instead of only the video module?

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