OVMF Logo

OVMF Logo

[Дмитрий Степанов]

Hello!
Is it possible to tune Logo's behavior in OVMF? Now it overlaps Windows
Logo during system boot

Re: OVMF Logo

[Laszlo Ersek]

Hi Dmitry,

On 05/05/18 12:36, \x14<8B@89 !B5?0=>2 wrote:
> Hello!
> Is it possible to tune Logo's behavior in OVMF? Now it overlaps
> Windows Logo during system boot

Hmmm, generally that shouldn't happen; the logo's location is made
available to windows via the BGRT (boot graphics resource table) ACPI
table. When we added BGRT support to OVMF [*], the location / appearance
of the Windows boot animation did change (because it started considering
the TianoCore logo displayed by OVMF), but I don't recall any actual
*conflict* between the logo & the boot animation.

[*] 6e5e544f227f ("OvmfPkg: Install BGRT ACPI table", 2017-01-06):

> Note from Laszlo Ersek <lersek@redhat.com>: without the BGRT ACPI
> table, Windows 8 and Windows 10 first clear the screen, then display a
> blue, slanted Windows picture above the rotating white boot animation.
> With the BGRT ACPI table, Windows 8 and Windows 10 don't clear the
> screen, the blue Windows image is not displayed, and the rotating
> white boot animation is shown between the firmware's original
> TianoCore boot splash and (optional) "Start boot option" progress bar.

In brief, this shouldn't happen, and if it does, it's not specific to
OVMF -- can you perhaps provide more information so that the
MdeModulePkg maintainers might help with the investigation? What Windows
release? What boot animation exactly? What screen resolution?

Thanks!
Laszlo

Re: OVMF Logo

[Richardson, Brian]

I'm unclear what you mean by "overlap Windows Logo". Can you provide a screenshot?

Thanks : br
---
Brian Richardson, Senior Technical Marketing Engineer, Intel Software
brian.richardson@intel.com -- @intel_brian (Twitter & WeChat)
https://software.intel.com/en-us/meet-the-developers/evangelists/team/brian-richardson 

-----Original Message-----
From: edk2-devel <edk2-devel-bounces@lists.01.org> On Behalf Of Laszlo Ersek
Sent: Tuesday, May 8, 2018 6:36 AM
To: Дмитрий Степанов <stepanov.dmit@gmail.com>; edk2-devel@lists.01.org
Subject: Re: [edk2] OVMF Logo

Hi Dmitry,

On 05/05/18 12:36, \x14<8B@89 !B5?0=>2 wrote:
> Hello!
> Is it possible to tune Logo's behavior in OVMF? Now it overlaps 
> Windows Logo during system boot

Hmmm, generally that shouldn't happen; the logo's location is made available to windows via the BGRT (boot graphics resource table) ACPI table. When we added BGRT support to OVMF [*], the location / appearance of the Windows boot animation did change (because it started considering the TianoCore logo displayed by OVMF), but I don't recall any actual
*conflict* between the logo & the boot animation.

[*] 6e5e544f227f ("OvmfPkg: Install BGRT ACPI table", 2017-01-06):

> Note from Laszlo Ersek <lersek@redhat.com>: without the BGRT ACPI 
> table, Windows 8 and Windows 10 first clear the screen, then display a 
> blue, slanted Windows picture above the rotating white boot animation.
> With the BGRT ACPI table, Windows 8 and Windows 10 don't clear the 
> screen, the blue Windows image is not displayed, and the rotating 
> white boot animation is shown between the firmware's original 
> TianoCore boot splash and (optional) "Start boot option" progress bar.

In brief, this shouldn't happen, and if it does, it's not specific to OVMF -- can you perhaps provide more information so that the MdeModulePkg maintainers might help with the investigation? What Windows release? What boot animation exactly? What screen resolution?

Thanks!
Laszlo
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Re: OVMF Logo

[Blibbet]

| [...] Is it possible to tune Logo's behavior in OVMF? [...]

FYI, the HackBGRT tool exists, and may be helpful [on some bare-metal
systems, unclear about OVMF-based usefulness]. I've never used it.

https://github.com/Metabolix/HackBGRT
https://firmwaresecurity.com/2018/03/22/hackbgrt-how-to-change-windows-boot-logo-using-hackbgrt/

HTH,
Lee Fisher

Re: OVMF Logo

[Richardson, Brian]

You shouldn't have to hack BGRT in OVMF since you change the logo in the EDK II source.

Can you provide a screenshot to show what the logo corruption looks like?

Thanks ... br
---
Brian Richardson, Senior Technical Marketing Engineer, Intel Software
brian.richardson@intel.com -- @intel_brian (Twitter & WeChat)
https://software.intel.com/en-us/meet-the-developers/evangelists/team/brian-richardson 

-----Original Message-----
From: edk2-devel <edk2-devel-bounces@lists.01.org> On Behalf Of Blibbet
Sent: Wednesday, May 9, 2018 8:21 PM
To: edk2-devel@lists.01.org
Subject: Re: [edk2] OVMF Logo

| [...] Is it possible to tune Logo's behavior in OVMF? [...]

FYI, the HackBGRT tool exists, and may be helpful [on some bare-metal systems, unclear about OVMF-based usefulness]. I've never used it.

https://github.com/Metabolix/HackBGRT
https://firmwaresecurity.com/2018/03/22/hackbgrt-how-to-change-windows-boot-logo-using-hackbgrt/

HTH,
Lee Fisher

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