Re: [coreboot] REG : GOP Driver

[Matt DeVillier]

On Thu, Aug 30, 2018 at 11:41 AM nagaraj a  wrote:
> Hi DeVillier,
>
> Thanks a lot for the kind response.
>
> <<
> Windows is fine as long as valid VBT data has been loaded into the Intel
> ACPI OpRegion, and the OpRegion is valid/has been fully populated.
> > >
>
> For the above note this holds good for already installed OS.
>
> In case if we are trying to install windows OS for the first time and GOP
> driver is not loaded for the Intel iGPU in that case I understand there
> will be blank out.

I'd have to test to be sure, but that sounds correct.  I know the Windows
installer uses a basic driver of some sort, and likely assumes a working
framebuffer exists
> Correct me if I'm wrong.
>
> //BR
> Nagaraj A
>
> On Thu, 30 Aug 2018, 8:57 pm Matt DeVillier, 
> wrote:
> > with Intel iGPUs and using Tianocore UEFI payload, Linux is fine
> > regardless if the display is initialized or not by GOP driver.  Windows is
> > fine as long as valid VBT data has been loaded into the Intel ACPI
> > OpRegion, and the OpRegion is valid/has been fully populated.
> >
> > On Thu, Aug 30, 2018 at 7:57 AM nagaraj a  wrote:
> > > All,
> > >
> > > I have query regarding GOP driver in UEFI.  Here is query details.
> > >
> > > If BIOS don't load UEFI GOP driver for  GPU and system boots into OS.
> > > Will latest windows /linux OS will be up with display or the display
> > > will be blank out.
> > >
> > > //BR
> > > Nagaraj A