I've had an Xduoo X3 for over 13 months and love it. I've had minimal problems apart from the occasional freeze - always solved by pressing reset.
Recently I accidentally dropped it from about 5 feet on to a ceramic tiled floor. It still works but the display is pretty unreadable as over half the pixels are missing.
Anyway, I bought a new X3 and wasn't sure how to install Rockbox on it. What I did was take the old 128gb microSD card, put it in the new X3, and run upgrade. This appeared to work fine. Rockbox works perfectly. However, if I lock it, it won't turn on at all. In fact it freezes. I have to press reset to do anything. If I lock it and plug into a USB cable it also freezes and needs a reset.
The problem is, this means I can't transfer files directly to my new X3. I've got round the problem by putting the microSD card in my old X3, transferring files to that and then putting the card back in the new X3. This is tedious as I transfer podcast files pretty well every day. On the other hand, it does work.
I've considered following the Rockbox uninstall process described at xvtx.ru and then exactly following the normal instal process, but I don't want to try anything that might cause worse problems.
Any suggestions?