Comment # 13 on bug 1019337 from Takashi Iwai

(In reply to Adrien Plazas from comment #12)
> (In reply to Takashi Iwai from comment #11)
> > OK, then check /usr/lib/dracut/modules.d/90kernel-modules/module-setup.sh.
> > There is a part like:
> > 
> >         hostonly='' instmods \
> >             sr_mod sd_mod scsi_dh ata_piix hid_generic unix \
> >             ehci-hcd ehci-pci ehci-platform \
> >             ohci-hcd ohci-pci \
> >             uhci-hcd \
> >             xhci-hcd xhci-pci xhci-plat-hcd \
> >             pinctrl-cherryview
> > 
> > If pinctrl-cherryview isn't present, add it like the above.
> > Then, append also pwm-lpss and i2c-designware-platform, too.
> > 
> > After changing it, rebuild initrd, and retest.
> > 
> > Also, another way would be to rebuild initrd with "-o drm" option so that
> > i915 module won't be loaded in initrd.
> 
> I added 'pinctrl-cherryview', 'pwm-lpss' and 'i2c-designware-platform', ran
> 'mkinitrd' and rebooted: no change.
> 
> I then ran initrd -o drm' and rebooted: no change.

There must be changes in the module loading order.  Check it, and also see the
difference of kernel messages.