I can not boot linux to the chromebook

[Sergiy3]

Dear HP company.

I have a problem. I can not boot linux to the chromebook from a USB flash drive or SD card.

The chromebook model is HP chromebook 11A G8 EE.

I enabled the developer mode. Also I enabled the alternative bootloaders and USB boot.

Also I applied the script from mrchromebox.tech site and updated the RW_LEGACY firmware.

The tianocore bootloader does not work. When I press ctrl + L and select the tianocore bootloader, I hear the short sound and it returns to the first boot screen with “os verification is off” message. There is no tianocore menu. I can not select the boot device.

I tried the different flash drives, card readers and SD cards.

I tried the ubuntu and fedora.

Btw the chrome os detects my flash drives and SD cards normally.

I researched the internet. My problem is known. The tianocore may not work due to a bug in a google firmware.

The firmware version:

chronos@localhost ~ $ sudo crossystem fwid

Google_Grunt.11031.169.0

I think the firmware update may help. Do you have the new firmware for my chromebook?

Or how else can I solve the problem?

Thank you.

[Sergiy3]

There is also a u-boot bootloader in my chromebook.

But the u-boot and its function autoboot don’t work.

After the u-boot tried to do autoboot the message was displayed:

Error: Invalid Boot Flag (found 0x0000, expected 0xaa55).

I checked the boot flag of the flash drive and SD card by command:

sudo hexdump -n 2 -e '"0x%04x\n"' -s 510 device-path

The result was 0xaa55.

So there is a bug in u-boot or it needs the special settings.

The checked flash drive and SD card had the MBR partition table and the boot ext4 partition.

How to view the u-boot settings?