I have a d850 that I bought used. It came with the stock updated image.
I rooted the phone, used an autorec app from the store to get TWRP on it, took a backup of the rooted image, (after much failed fiddling with other methods) and flashed the latest CM nightly for the D850 on it. After much fiddling, I finally found a GApps package that worked and flashed that as well to get CM working properly, then took another backup.
At this point I was pretty happy that I had everything working how I wanted. However, I paired my phone with my vehicle (bluetooth) and shortly afterwards the phone shut off.
In this state, the buttons on the phone produce no result. I tried a battery pull, plugging it in and some other shenanigans and nothing worked. Just when I was about to declare it bricked, I discovered something. If I pull the battery, and then plug the phone into power, the error screen comes up. At this point, I could reinsert the battery and the phone would switch to the powered off charging mode (green battery icon). From here, I can reboot the phone into recovery mode (via button pushes), but only if I remove the charge cable once the LG screen comes up. If I don't remove the charging cable, the LG screen comes up, then the phone switches back to powered off charging mode (green battery icon). From recovery (TWRP) I can boot the system back up normally and everything runs fine. I can reboot the phone without issue. However, if I power off the phone, I have to play the pull the battery, plug the cable game again.
I have no idea what portion of the phone (bootloader, recovery image, image, etc) controls what the buttons do when the phone is off. Anyone have any ideas on what I have hosed or how I can fix it?
UPDATE: I found a second method today. Inserting the battery while holding down the power button will also boot the phone successfully. Still clunky, but less clunky.
I rooted the phone, used an autorec app from the store to get TWRP on it, took a backup of the rooted image, (after much failed fiddling with other methods) and flashed the latest CM nightly for the D850 on it. After much fiddling, I finally found a GApps package that worked and flashed that as well to get CM working properly, then took another backup.
At this point I was pretty happy that I had everything working how I wanted. However, I paired my phone with my vehicle (bluetooth) and shortly afterwards the phone shut off.
In this state, the buttons on the phone produce no result. I tried a battery pull, plugging it in and some other shenanigans and nothing worked. Just when I was about to declare it bricked, I discovered something. If I pull the battery, and then plug the phone into power, the error screen comes up. At this point, I could reinsert the battery and the phone would switch to the powered off charging mode (green battery icon). From here, I can reboot the phone into recovery mode (via button pushes), but only if I remove the charge cable once the LG screen comes up. If I don't remove the charging cable, the LG screen comes up, then the phone switches back to powered off charging mode (green battery icon). From recovery (TWRP) I can boot the system back up normally and everything runs fine. I can reboot the phone without issue. However, if I power off the phone, I have to play the pull the battery, plug the cable game again.
I have no idea what portion of the phone (bootloader, recovery image, image, etc) controls what the buttons do when the phone is off. Anyone have any ideas on what I have hosed or how I can fix it?
UPDATE: I found a second method today. Inserting the battery while holding down the power button will also boot the phone successfully. Still clunky, but less clunky.
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