I'm thinking more and more about an hardware modification on the latest tablets.
I have 100 tablets SM-T580 bought during the last 4 months. I've flashed lineageOS 14.1 with the oldest ones without any problem. But with the newest ones, I was unabled to do the same operation.
Problems :
- TWRP encountered a graphics problem solved here
- When LineageOS 14.1 is installed, another problem occurs. When you switch off/on the tablet or when the device goes to sleep mode by itself. If you try to switch on the tablet, a black screen appears. The tablet is working normally but you can't see anything: Touch is fully working (reboot possible if you know where to tap). When you reboot, everything works normally. It seems to be a graphics problem too.
It's not a problem of firwmare version as I could say, the problem occurs on BRB2 or BRF1 firmwares. I've searched and found something :
- Each tablet has a serial number like this R52Kxxxxxxxx and there is some kind of incrementing
- The problems doesn't occurs on R52K707xxxx and under
- The problem still occurs on R52K70Kxxxx and above
This problem occurs with LineageOS 14.1 and
15.1 but not with
16.0
I'm not able to correct the problem and build a new version of LineageOS, but i need some help, thanks !