Hi all, just a little wrap up, I managed to put FlymeOS 6.2 on the phone finally.
I wanted to try the last Ubuntu build but unfortunately I couldn't get it to work, not sure why.
Someday I will get back to it but as of now i need android and wa basically.

I'm a bit unsatisfied with this phone, it's always warm and that does not help the battery which dries out fast. I wondered if that could possibly depend on un-optimized drivers on Ubuntu, it doesn't, the exact same thing happens on android, it's a hardware problem i think. Also the display is very good, big and bright but it's consuming a lot, that doesn't help the battery either.
In the end I will have to try it out and see if it lasts enough for my habits.. my hard earned money saving could last little time, sigh

Another time, thank you all for all your advices and help, without it i would still be trying (and swearing).

See you soon,
Sandro

Trying with manual installation, not without issues but i managed to follow all the instructions somehow.. just one question, this command does not work:

'sudo fastboot oem unlock'

It gives me the following error:
FAILED (remote: 'unknown command')
fastboot: error: Command failed

Is that fine?

So i found these posts:

https://askubuntu.com/questions/644245/ubuntu-mx4-not-detected-on-ubuntu-sdk?noredirect=1&lq=1

https://forum.xda-developers.com/general/help/meizu-mx4-ubuntu-to-android-flyme-t3172828

and it seems MX4 has definitely some problems with usb connection, it appears it's a common issue, but someone found that "adding the vendor ID to adb_usb.ini seems to help".

Of course there was no such file in my pc fuuuu..... so continued looking and searching and found this:

https://stackoverflow.com/questions/9709263/google-android-usb-driver-and-adb

which basically says you have to modify another file: android_winusb.inf with other data. (all the instructions in the link), i did, no luck. I then re-installed the usb driver and made sure it was fine, and finally.. adb seeing my device! What a battle it was.

And for today that's enough. Tomorrow I will try the adb method and pray to God it will work.
Sandro

@advocatux
I'm really out of luck with the installer, the phone is not recognized, I select the model manually and when it's time to reboot to fastboot mode it simply does not if the usb cable is connected.
Tried to remove the cable, boot to fb and reconnect, not working.

Same with adb

Ok, flashing went fine and now the phone has ubuntu 15.04 r26.

If I understand right I should find the image with 16.04 and ubports store set as default is that right?
Will look for that.

Thank you all

Damn.. those instructions on spflash site miss the last step which is to power on the device!
But probably it's just that I'm stoopied and that was obvious however It's flashing..fingers crossed.

@Lakotaubp

Thanks for taking the time to answer me, well, now i can't but I'll give it a try tomorrow, however i already tried every reset option I found on the device, multiple times, what I think is that there is some kind of permission problem, I start to think there 's no way to solve that as even reset does not help.

If confirmation dialogue is mandatory and theres no way to bypass it i think I'm done trying.

So, any advice for a new phone?
What about Nokia 7.1?

Thank you everyone for sharing your advices anyway
Sandro

I don't see any phone in SP Flash, as I understand on the phone I should see a confirmation dialogue to let my pc see sys folders, this does not happen, I can see:

Documents, Downloads, Pictures, Music, Videos.

Also, i forgot to mention that if I try to boot the phone in Fastboot mode it hangs showing "=> FASTBOOT mode..."

@advocatux

I didn't see you posted the link to SPFlash, now I'm going to try flash the phone if I have the time

@advocatux

@advocatux

Hope this is the right one:
https://spflashtool.com/

@advocatux

Any chance there's SP Flash tool for Windows?

@advocatux

Will check and get back to you, atm the phone is almost unusable so no problem if it gets bricked, at least I tried

Oh, sorry, I miss the second part MK73 wrote.

-did you install from OpenStore on your UT the Terminal app?
Since I reset the device I only have Ubuntu store and it does not work.

-what is your OS you have on your laptop?
Win 7 x64

-was it you? who installed UT on the MX4?
UT I suppose is terminal, then yes, it was not installed from factory, at the time i got it in Ubuntu store

-we need to know more about your experience to help with the steps to follow!
Basically I don't have terminal and I don't have a working store to get it, I tried to browse the open store website and got a .click file that however no app can open.

-You have dev mode in system settings set to on
Yes

-and you have passcode or phrase set to use dev mode?.
I have a passcode, under "lock security" there's a checkmark on 4-digit passcode.

-What OS is on your pc? If windows this version of adb is best...
You mean 1.43? I got the last one

-Try switching off and restarting your device and try again with adb start-server....
Yes, did that countless times

Thanks everyone

Hi mk73, no I don't have terminal anymore, nor open store.
Thank you

Hi advocatux, thank you for your reply

I put adb on my pc and tried connecting but no request appears on the phone and the device isn't listed..

I probably made a mistake because I forgot term had to be installed from the store and I don't have it anymore since I reset the device

Sandro

Hi everyone,
my name is Sandro and I'm new to the forum, I subscribed because I have a Meizu MX4 Ubuntu version that I wanted to root and flash with something more updated.
Actually the phone is using ubuntu 15.04 (OTA-15), I tried different ways but I can't root the device, adb does not recognize it. Seems dev mode isn't active but it is.

Anyone care to help me solve the problem?

Thank you