@MrT10001 Thank you @arubislander and MrT1000

I am think of giving up , it's so boooring (10 days... 10DAYS, it's enough, for me so complicated it is) although I am learning about amazing tools and trics

Thank you for your responses guys !!

Now : no valid slot to boot
I could reinstall Android V9 (the good one, about that : the installer says Google Pixel 3a/3a XL (sargo) but I have a 3a XL and they put the "bonito" https://developers.google.com/android/images#bonito)

There is always some problem

@kandjou When I connect my phone to charge, the screen become crazy, impossible to select the icone I touch.

Cl : DON'T buy a Google Pixel 3a XL

Thank you for your time

bye

@lduboeuf I give up guys. Sorry !

10 days for no having results

When I install UT my screen doesn't respond.

Conculsion : DON'T BUY a Google Pixel 3a XL

Thank you for your time

Bye

@MrT10001 Thank you @arubislander and MrT1000

I am think of giving up , it's so boooring (10 days... 10DAYS, it's enough, for me so complicated it is) although I am learning about amazing tools and trics

Thank you for your responses guys !!

Now : no valid slot to boot
I could reinstall Android V9 (the good one, about that : the installer says Google Pixel 3a/3a XL (sargo) but I have a 3a XL and they put the "bonito" https://developers.google.com/android/images#bonito)

There is always some problem

@kandjou It seems many users have this screen problem

Is it possible to set the smartphone like Nothing happened.
A new one (in my case it is so because I've just bought it)
How to do that (locking the phone ? Good idea ?)

THEN, installing UT like for the first time ?

Why nobody has found the solution of this commun problem ?

@MrT10001 do you think we can do something with halium9 ?? (I have no idea of what it is but the ground of UT I suppose)

@MrT10001

UB Ports Installer says :

Error : unhandled rejection at [object Promise] :
Error : Failed to create run: FetchError: request to https://ubports.open-cuts.org/graphql failed reason: ECONNRESET

I don't think my screen is dead but it does'nt works for now...

Why the 20.04 devl option , you have an idea ?
Thank you

@kandjou I did it with the option you said but the screen is not working again ..

@MrT10001 I am there , I can see 20.04 dev

@MrT10001 Thank you MrT, you are helping a lot.
With the latest developer option ? Sorry, what do you mean ?

@MrT10001 Sorry , there is another thing : before the google logo and just after to reboot (keeping pressing the power button)
I see the bootloader screen with the careful logo and "Press power button to pause" then this text :

The bootloader is unlocked and software intregrity, etc.