Uefitool replace body how to#

The type ids for the Raw and UI sections are 0x19 and 0x15 respectively. The values of the size fields include the 4 header bytes. The LzmaCustomDecompressGuid node in my original firmware contains two children: one Raw section containing the jpg file contents and one UI section with the string 'Logo.bmp' (no idea why it's called bmp if there's a jpg file inside).Įach section starts with a 4 byte header consisting of a 3 byte size field and a single byte type field. We will have to manually recreate the subtree of the Logo node. In my case there were three matches, the correct one should have a single child with GUID EE4E5898-3914-4259-9D6E-DC7BD79403CF, aka.

Open the firmware in UEFITool and use the search dialog to find the GUID 7BB28B99-61BB-11D5-9A5D-0090273FC14D, which refers to the Logo file. Step 2 - Finding the logo sectionĭownload UEFITool and the firmware for your BIOS. If your file uses the incorrect encoding, the command will fail claiming that it contains unsupported jpg data. You can check whether the jpg file is valid by attempting to insert it into a firmware image using ChangeLogoPro: ChangeLogoWin64.exe /i firmware.bin /o test.bin /m 1 /r image_file.jpg. jpg file can't contain any S0F2 markers, or the image will show as pure black at boot time). Make sure to select 'Baseline (Standard)' in the Photoshop export window, because the 'Progressive' encoding is not supported (the. png are also supported (haven't tested that though).ĬhangeLogoPro outputs a warning for images larger than 800圆00, but we won't use it anyway, so I'm not sure whether the size actually matters as long as it's smaller than the resolution used for the boot screen. For the purpose of this guide I will use jpg files because that's the format of the preinstalled logo, but I believe. Step 1 - Creating the image fileĬreate an image of your choice in any image editor.

UEFITool was still useful to check whether my edits are valid and to decipher the file format. I had to manually edit the firmware file. This guide is based on this, but for some reason the 'Replace Body' options in UEFITool are grayed out for me, so I couldn't use them.

Uefitool replace body how to#

Instructions on how to change the boot logo on a Gigabyte Z690 GAMING X mainboard