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2015-03-12 11:31 PM
Well, it's not a build problem but by using the zip from http://fxpblog.co/aosp/aosp-5-0/ with fastboot on a brand new XPeria M2 (boot, system and userdata) didn't boot the phone (black screen, red flashing ligjht)
What could cause this black screen? (phone had 4.4.4 stock)
Is it also possible by flashing AOSP other components (SIM card reading functionality) also becomes unusable?
- I bought a new phone,
- never tried my SIM card but flashed AOSP immediately
- black screen at boot
- Next I flashed 4.4.2 (flashtool) and then again AOSP: OK!
- but "SIM card not recognised" (tried with 3 different SIM cards)
- After using the Sony tool to put stock ROM back still "SIM card not recognised"
Many thanks for all your work on AOSP and other things.....
2015-03-13 09:25 AM
Since fxpblog.co is a comunity project we can not suport debuging it
Please build yourself a rom from source and we will help you debug it
2015-03-16 08:45 AM
OK: I have created a 5.1 ROM.
Flashed boot+system+userdata with fastboot
Result: no boot at all (4.4.4 was present on the phone before flashing). Only a black screen.
Next I installed 4.4.2 with flashboot, and next retried fastboot 5.1 and it booted!
Why is this necessary? This scares me a bit because I had hoped the booting always would work (that the OS is "self-contained" and able to boot), but it seems a part of another ROM is needed to boot successfully. Which one is that (the modem part?).
After the 4.4.2 and 5.1 flashing, I noticed that I couldn't dial somebody, so I installed 5.0.2 with flashboot.
However, even 5.0.2 didn't want to boot (continuous boot logo). After reflashing 4.4.2 and next 5.0.2 again it worked and I now have calls again...
So 2 things:
- flashing often gives booting issues. This is the most interestig for me because it demonstrates the fact a ROM has other dependencies that I'm stll unaware of... (and I really do not wish to brick my phone)
- no phone in 5.1
Many thanks for all the work!
2015-03-16 09:31 AM - edited 2015-03-16 09:33 AM
firmware is flashed on phone when you flash sony image
the case you describe is normal i will test both 4.4.2 and 4.4.4 to check compatibility
2015-03-16 09:43 AM
Wow: quick answer! Thanks for that.... I also tried the XDA forum but there's little answer there :-(
I thought the Sony firmware (ftf file at the moment) just contains other partitions as well (modem etc). Do you mean with "firmware" one of those partitions or is it something completely else?
And if so, which one causes the "non-boot if 4.4.4 is present"?
I presumed the kernel (boot.img) contained the kernel and drivers to make basic booting possible, and other partitions (like modem) are there to make other things work (like cellular data).
If I need to retry all these questions on XDA, feel free to let me now!
2015-03-16 01:24 PM
Then why is flashing 4.4.2 necessary before trying to run AOSP?
There must be a reason why I'm getting a black screen if I do not flash 4.4.2 first.
2015-03-16 04:27 PM
There are several partition on a device.
When you flash AOSP you flash only boot,system,userdata partitions, leaving the other ones as they are.
On some devices firmare is located in /etc/firmware, on some devices it can be found on a separate partiton that is flashed during update process
To be able to boot you have to have firmware and kernel in sync or firmware can not be loaded.