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Edited by DataMannen at 2018-3-27 21:32
I totally agree. I've now spent alot of time trying to get my RK3399 to boot from sdcard without success.
Yes, I have tried different sdcards. I even "borrowed" a card which I know to be working and is booting/running fine on my RPi3. I took a backup of it before overwriting it with different images for RK3399 without success. I tried the pre-built Debian and Ubuntu images from the download section and a custom built image I made using the Linux SDK. I have followed a number of different guides on the OrangePi WiKi, sunxi.org, opensource.rock-chips.com, http://www.denx.de/wiki/U-Boot and many others. No success. When I later restored the backed up RPi3 image to the sdcard and put it into the RPi3 it boots right away, flawlessly. (Yes, i have also tried other cards).
The symptom is always the same; there is no HDMI output to my monitor at all (missing signal). If I boot my OrangePi RK3399 without any sdcard inserted, it boots fine into Android so it is not some cable or monitor issue.
I'm running out of both ideas and patience and I seriously wonder if you actually have tested your images on an sdcard at all (OrangePi-rk3399_Debian9_20171218.img and OrangePi-rk3399_Ubuntu16.04_20171227.img).
Still, it is definitely possible that it is me who have missed something or screwed up in some way so I'm not pointing fingers or playing the "blame-game".... I simply just want it to work. *sigh*
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