Re: [ros-dev] [ros-diffs] [rharabien] 52244: [NTOSKRNL] - Disable displaying string by bootvid after successful kernel phase 1 initialization, so there won't be graphical glitches at the top of screen if system has screen d...

[Alex Ionescu]

It's an internal kernel call, so SMSS can't call it.

But you can leave display string enabled -- it doesn't affect anything.

In fact, if you NtDisplayString something in Windows, and then later unload the video
driver (restoring the VGA context), you'll see the string.

--
Best regards,
Alex Ionescu

On 2011-06-15, at 9:50 AM, Rafał H wrote:

>   You are right. I forgot about boot applications.
>  Where disabling display string should be then? Is SmLoadSubsystems good place for it?
>  
>  Best regards,
>  Rafał Harabień
>  
> >   How do you expect to see autochk's boot
> > strings if you disabled DisplayString before launching smss?
> >  
> >  The correct order is this:
> >  
> >  1) Enable Inbv + Disable Strings
> >  2) re-enable strings if SOS is on
> >  3) Create smss
> >  4) Finalize boot logo
> >  5) Set progressbar to 100%
> >  6) Enable display strings
> >  7) Wait 5 seconds for smss
> >  
> >  Also all those DPRINT1s should be KeBugChecks with things like
> > SESSIONX_INITIALIZATION_FAILED, IOX_INITIALIZATION_FAILED, etc....
> >  
> >  --
> >  Best regards,
> >  Alex Ionescu
> >  
> >  On 2011-06-15, at 9:12 AM, Rafał H wrote:
> >  
> > > >   Or
> > > > another way of putting this...
> > > >  
> > > >  ""Fix" 100% correct reverse engineered NT code and break it so that it
> > > > matches ReactOS's broken Video Driver Framework behaviour, instead of fixing the
> > > > latter".
> > > >  
> > > >  Never gets old~
> > > >  
> > > >  --
> > > >  Best regards,
> > > >  Alex Ionescu
> > > >   
> > >  
> > >  What's wrong? How you want to display strings by bootvid driver which uses VGA, when
> > > another 3rd party driver can be loaded? It doesn't make sense.
> > >  I don't reverse NT kernel but disabling bootvid functionality when we switch to
> > > normal graphics mode make sense for me...
> > >  
> > >  Best regards,
> > >  Rafal Harabien
> > >  
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> >  
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