Yesterday an upgrade to OTA-10 was available on my Meizu MX4 Ubuntu Edition. I downloaded the upgrade, and clicked the "install" button. Confirmed that the device was allowed to restart, and saw the device restart and an ubuntu logo came up. After about 30-50 seconds the Ubuntu logo was replaced by a picture of a small sign/icon of a computer-chip with a red cross behind it. Apparently something went wrong - but no form of error message was shown. The device was unresponsive - only thing to do was turn it off. When turned on again, it booted like normal - but the device is back to OTA-9.1. That is, I see a few subtle changes in graphics, and under phone information it clearly states OTA-9.1. What went wrong? What to do about it? How do I get it to fully upgrade to OTA-10?
PS: The update/upgrade to OTA-10 is still available, and I have tried to install it a couple of times - to no avail. Same thing happens again ...
PPS: I have nothing special installed or developermode or read/write turned on, or played with apt-get etc. Plain factory reset phone, that has been used as a normal smart-phone and nothing else for a couple of months.