What if there is no any VPD info

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What if there is no any VPD info #634

Closed hdid closed 4 months ago

hdid commented 4 months ago

Hi @MrChromebox I have Asus Chromebox CN62. After successfully flashing the device, It does not boot fine and stay on black screen and restart after some seconds (maybe like #294) I got ch341 and did the commands up to VPD section; but there is no any VPD info and I get:

This is a legacy image that contains only a CBFS
The image will be left unmodified.

Can you help? Thanks

MrChromebox commented 4 months ago

do you have the original stock firmware? you can extract the VPD from that

cbfstool can't parse the image read from the ch341a, so either it's a bad image or a bad read. Zip and attach the image here so I can take a look at it

hdid commented 4 months ago

No suddenly I have not stock one. cn62flash.zip

MrChromebox commented 4 months ago

that read is mostly garbage, are you sure the connector is on properly etc?

hdid commented 4 months ago

Well this is the flash chip And CMD:

MrChromebox commented 4 months ago

all I can tell you is that the badflash.rom you sent is all garbage, and I don't know how the contents of the flash chip could possibly end up that way, so I'd have to assume it's a bad read. That said, there's no harm in directly flashing the latest UEFI firmware image directly to the chip, you just won't have a unique serial # or MAC address. But you can always set those later on.

hdid commented 4 months ago

Thank you @MrChromebox Well serial number is not important just how can i edit UEFI rom to set MAC address before writing the firmware?

MrChromebox commented 4 months ago

download UEFI firmware image
download vpd tool: https://mrchromebox.tech/files/util/vpd.tar.gz
extract tool: tar zxf vpd.tar.gz
init vpd region: ./vpd -f coreboot.rom -i RO_VPD -O (where coreboot.rom is the name of the UEFI firmware image downloaded, and last param is capital letter O)
set serial, mac address: ./vpd -f coreboot.rom -i RO_VPD -s "serial_number"="12334567890" ./vpd -f coreboot.rom -i RO_VPD -s "ethernet_mac"="aa:bb:cc:dd:ee:ff"
flash UEFI firmware image to device

hdid commented 4 months ago

"12334567890" "aa:bb:cc:dd:ee:ff"

Are these strings case sensitive or not important?

MrChromebox commented 4 months ago

Are these strings case sensitive or not important?

shouldn't be, but I'd use lowercase for the MAC address just in case

hdid commented 4 months ago

@MrChromebox Thank you so much. My Chromebox was revived again.