For reference, that last link is for the shield portable, not the tablet. But yes, it requires a working bootloader of some form, not really helpful here. I've always just stuck with the default fastboot, never been brave enough to try to get u-boot working due to an almost certain perma-brick chance. We've never got mainline Linux booting on the tablet due to lack of a proper dtb. There was a very basic one made by gnurou for like 3.17, but a change to the framebuffer stack nullified that and I haven't been able to rebuild a proper one for the new format.
On Jun 19, 2017 10:53, "Stephen Warren" swarren@wwwdotorg.org wrote:
On 06/18/2017 04:46 PM, Matthew Gorski wrote:
I am curious if there is a possibility to recover a wrongly flashed NVIDIA SHIELD TV device by flashing u-boot instead of cboot and mounting the emmc in uboot to do some repairs.
The NVIDIA SHIELD TV is a production Android device, and hence I'm pretty sure it has boot security enabled. This security also applies to the USB recovery mode protocol, so I don't believe you'll be able to communicate with the device unless you know the system's keys, which I assume you don't.
There is some support for flashing generic upstream Linux onto the NVIDIA SHIELD tablet, but I believe that relies on making (at least some of) the modifications from a running system, so if your system isn't booting, I don't expect this will work either. Just in case it's useful, see: