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[Jolla-Tablet] is the hardware locked down? Can I replace UEFI?

asked 2015-10-13 16:51:55 +0300

lynxis gravatar image

updated 2015-10-14 02:18:43 +0300

To have a good and secure device it's necessary to update the bootloader. As well it's much more secure to have an open-source bootloader. The ChromeOS is doing the splits between an open-source firmware/UEFI, secure device and a hackable device. You have to open the device up to install your own UEFI/bootloader, but it's possible (write protect screw).

Intel develops IntelBootGuard, it verifies the UEFI/BIOS when the computer starts. The verification is based on cryptographic algorithm signature (RSA). The key is fused into the chipset itself. If the verification fails, the device will not boot. If this happens, the device is a brick. IntelBootGuards take the ownership away from the user.

So the final though is: Who owns the jolla tablet? Do I own it or Jolla owns it? old video over TPM but it fits for IntelBootGuard

PS. I will port coreboot to the jolla tablet if possible because of IntelBootGuard. PPS. EDIT change the question topic to be more understandable and move the bullet points downwards.

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Jolla promised during the original campaign that the bootloader on the tablet will be open, so that it is possible to boot other operating systems on, such as Nemo Mobile, Fedora, etc.

So it would be nice if someone who already has the tablet confirms its actually the case in the end. :)

MartinK ( 2015-10-13 18:10:43 +0300 )edit
2

@MartinK I don't want to use the bootloader, I want to replace it.

lynxis ( 2015-10-13 18:17:54 +0300 )edit

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answered 2015-10-13 19:35:25 +0300

updated 2015-10-13 19:35:43 +0300

No, USB OTG -> Keyboard and I think ESC or F2 a couple of times. UEFI. Have fun. SecureBoot madness included, but can be configured to your own means with physical access. Efilinux loads any unsigned boot.img you hand it.

Coreboot not likely.

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1

Thanks, I deleted my bad guess from front of your great answer

simo ( 2015-10-13 19:38:48 +0300 )edit
4

Master Yoda has spoken :D

mosen ( 2015-10-13 19:44:01 +0300 )edit
2

Thank you!

g7 ( 2015-10-13 19:55:51 +0300 )edit

@Stskeeps I'll change the topic. I written this question in a rush. I'm talking on replacing the UEFI with coreboot. But this depends on your settings in the ME.

What do you mean with "Coreboot not likely"?

lynxis ( 2015-10-13 20:35:52 +0300 )edit

Can you clarify on the Secureboot? Would I be able to install my own OS?

Axion ( 2015-10-13 22:37:19 +0300 )edit
0

answered 2015-10-13 18:23:47 +0300

simo gravatar image

(not an answer) It seems the unlocking option is really missing:

Recovery mode on the phone:

Jolla Phone recovery

Recovery mode on the tablet (misses unlock option):

Jolla Tablet recovery

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Weird - maybe it just works differently ? Remember that there should be UEFI on the tablet, not the barebones bootloader that is on the phone.

MartinK ( 2015-10-13 18:29:04 +0300 )edit
1

It's possible... The tablet can be booted to "droidboot" where one option is the Recovery (menu above), but any earlier options are not listed by the service and support page (from where I captured these images)

simo ( 2015-10-13 18:32:49 +0300 )edit

@simo Interesting! That might very well be it. I guess we will see once we actually get physical tablets. :)

MartinK ( 2015-10-13 18:34:24 +0300 )edit
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Asked: 2015-10-13 16:51:55 +0300

Seen: 1,386 times

Last updated: Oct 14 '15