P8 Lite 2017 cannot revive

[fofesz]

Tried to downgrade P8 lite 2017 from 8.0, now ended up a mixture of android 7 & 8. Unfortunately I formatted data partition to EXT4, after that TWRP cannot mount.

So flashed with DC Phoenix, Method 1 & 2 now have erecovery but cannot finish flashing correctly:

Looking for a device in force upgrade mode
No devices detected in force upgrade mode

Looking for a device in fastboot mode

Device found: 0123456789ABCDEF


2018.09.11. 21:02:20 Starting to write device in FASTBOOT mode...
File to update: Prague-AL00A_HL1PRAMAA001036_Board Software_general_Android 7.0_EMUI 5.0_05022DCA.dgtks

Device found: 0123456789ABCDEF

IMEI: 8650060358xxxx3
Build number: :PRA-LX1 8.0.0.365(C02)
Product model: PRA-LX1

Erasing nvme partition
Partition nvme erased

Erasing cust partition
Partition cust erased

Erasing misc partition
Partition misc erased

Erasing userdata partition
Partition userdata erased
xloaderpartition is not written because is in the APP file

Writing ptable partition with file fastbootimage/ptable.img
ptable partition UPDATE ...OK
fastbootpartition is not written because is in the APP file
dtspartition is not written because is in the APP file
fw_lpm3partition is not written because is in the APP file
sensorhubpartition is not written because is in the APP file
fw_hifipartition is not written because is in the APP file
teeospartition is not written because is in the APP file
recoverypartition is not written because is in the APP file

Erasing cache partition
Partition cache erased

Writing cache partition with file fastbootimage/cache.img
cache partition UPDATE ...OK
bootpartition is not written because is in the APP file

Writing nvme partition with file fastbootimage/nvme.img
nvme partition UPDATE ...OK
trustfirmwarepartition is not written because is in the APP file
modem_fwpartition is not written because is in the APP file
modemnvm_updatepartition is not written because is in the APP file

Writing modem_om partition with file fastbootimage/modem_fs.img
modem_om partition UPDATE ...OK

Writing modemnvm_img partition with file fastbootimage/modem_nv.img
modemnvm_img partition UPDATE ...OK

Erasing userdata partition
Partition userdata erased

Writing userdata partition with file fastbootimage/userdata.img
userdata partition UPDATE ...OK
systempartition is not written because is in the APP file

Writing splash2 partition with file fastbootimage/splash2.img
splash2 partition UPDATE ...OK

Erasing cust partition
Partition cust erased

Writing cust partition with file fastbootimage/cust_factory.img
cust partition UPDATE ...OK

Writing secure_storage partition with file fastbootimage/secure_storage.img
secure_storage partition UPDATE ...OK
Software written

2018.09.11. 21:02:57 Writing device finished OK
Checking fastboot device

Device found: 0123456789ABCDEF


2018.09.11. 21:02:58 Starting extracting partitions from file UPDATE.APP
Current version: PRA-LX2C999B000
Cannot create extract directory: D:\..\tmp\20180911_210258_UPDATE\
Extract files to directory: D:\..\
Extracting partition: XLOADER OK
Extracting partition: FW_LPM3 OK
Extracting partition: FASTBOOT OK
Extracting partition: MODEMNVM_UPDATE OK
Extracting partition: TEEOS OK
Extracting partition: TRUSTFIRMWARE OK
Extracting partition: SENSORHUB OK
Extracting partition: FW_HIFI OK
Extracting partition: BOOT OK
Extracting partition: RECOVERY OK
Extracting partition: RECOVERY2 OK
Extracting partition: DTS OK
Extracting partition: MODEM_FW OK
Extracting partition: SYSTEM OK
2018.09.11. 21:03:51 Extracting partitions finished OK

2018.09.11. 21:03:51 Starting to write device in FASTBOOT mode...

Device found: 0123456789ABCDEF

IMEI: 8650060358xxxx3
Build number: :PRA-LX1 8.0.0.365(C02)
Product model: PRA-LX1

Writing XLOADER partition with file D:\..\XLOADER.img
XLOADER partition UPDATE ...OK

Writing FW_LPM3 partition with file D:\..\FW_LPM3.img
FW_LPM3 partition UPDATE ...OK

Writing FASTBOOT partition with file D:\..\FASTBOOT.img
FASTBOOT partition UPDATE ...OK

Writing MODEMNVM_UPDATE partition with file D:\..\MODEMNVM_UPDATE.img
MODEMNVM_UPDATE partition UPDATE ...OK

Writing TEEOS partition with file D:\..\TEEOS.img
TEEOS partition UPDATE ...OK

Writing TRUSTFIRMWARE partition with file D:\..\TRUSTFIRMWARE.img
TRUSTFIRMWARE partition UPDATE ...OK

Writing SENSORHUB partition with file D:\..\SENSORHUB.img
SENSORHUB partition UPDATE ...OK

Writing FW_HIFI partition with file D:\..\FW_HIFI.img
FW_HIFI partition UPDATE ...OK

Writing BOOT partition with file D:\..\BOOT.img
BOOT partition UPDATE ...OK

Writing RECOVERY partition with file D:\..\RECOVERY.img
RECOVERY partition UPDATE ...OK

Writing RECOVERY2 partition with file D:\..\RECOVERY2.img
RECOVERY2 partition UPDATE ...OK

Writing DTS partition with file D:\..\DTS.img
DTS partition UPDATE ...OK

Writing MODEM_FW partition with file D:\..\MODEM_FW.img
MODEM_FW partition UPDATE ...OK

Writing SYSTEM partition with file D:\..\SYSTEM.img
SYSTEM partition UPDATE ...OK
Software written
2018.09.11. 21:07:10 Writing device finished OK

Waiting for fastboot device...

Device found: 0123456789ABCDEF


Writing rescue_recovery partition with file recovery
rescue_recovery partition UPDATE ...OK
Looking for device in upgrade mode...
COM15: Android Adapter PCUI (COM15)
COM12: DBAdapter Reserved Interface (COM12)

2018.09.11. 21:07:39 Starting to write device in UPGRADE mode...
File to update: UPDATE.APP
Current version: PRA-LX2C999B000
Validating file...
Looking for attached port...
Preparing to write...
Writing file 1 of 22: SHA256RSA...OK
Writing file 2 of 22: CRC...OK
Writing file 3 of 22: CURVER...OK
Writing file 4 of 22: VERLIST...
Error downloading file 4 of 22
Error writing software
2018.09.11. 21:08:05 Writing device finished with ERROR

Cannot update device in upgrade mode

how could re-partition the phone? After factory dgtks file its better state, but still unable to boot so cannot change oeminfo / finish VERLIST flashing

[Namelocked]

If phone does not boot up after flashing just board software then not possible to revive it sadly.

[fofesz]

thanks your answer, seems this was an expensive trial
hope you add oreo support soon