Low beep when booting from USB (Samsung Chromebook)

[ZeteMKaa]

Hi All,

I've followed every manual but can't seem to get it to work.
I've downloaded the ARMhf images and used DD to write it to my USB drive.


localhost ~ # cgpt show /dev/sda
start size part contents
0 1 PMBR
1 1 Pri GPT header
2 32 Pri GPT table
8192 32768 1 Label: "KERN-A"
Type: ChromeOS kernel
UUID: 9CE0F283-C9F5-4050-8558-3AD3DF69BDD5
Attr: priority=5 tries=5 successful=1
40960 32768 2 Label: "KERN-B"
Type: ChromeOS kernel
UUID: 511E3DAD-67B9-494D-81C2-C1DECC3BDD21
Attr: priority=10 tries=5 successful=1
73728 13598114 3 Label: "Linux filesystem"
Type: 0FC63DAF-8483-4772-8E79-3D69D8477DE4
UUID: F3211E80-8493-42A7-B709-77BA907B96BC
31266783 32 Sec GPT table
31266815 1 Sec GPT header



localhost ~ # crossystem
dev_boot_usb = 1 # Enable developer mode boot from USB/SD (writable)
dev_boot_legacy = 1 # Enable developer mode boot Legacy OSes (writable)
dev_boot_signed_only = 0 # Enable developer mode boot only from official kernels (writable)

I then enterd dev mode with the command

chromeos-firmwareupdate --mode=todev

But when I boot and press CTRL+U my screen turns black and I hear a low beep, it then returns to the bootscreen.
I'm using the USB2.0 port so that can't be the problem. Can someone help me out ?

Thanks in advance.

// ZeteMKaa