@E-Z-Tux All is not lost. You need to charge the device up. Put it on charge for a day. If it fails to boot after that then you can use the Lenovo Software Fix Tool to recover Android to the device (requires a Windows PC).

@MadDino I have used Windows 11 to unlock the bootloader and install UT my ASUS devices. It is not the easiest phone to install UT onto. The build number won't make a difference unlocking the bootloader, but when you unlock the bootloader use this (quote from devices page):

"The port is based on Android 9 firmware (WW-16.2017.2004.063) and Lineage 16 vendor image. Current Recovery will be replaced with Ubports Recovery!"

I think you are experiencing difficulties with the ASUS drivers. On Windows uninstall the drivers, reboot the PC, install the drivers and try again. If that fails try disabling driver signing which is a bit of a messy workaround. I found that one of the Windows updates messed with the drivers and uninstalling them and reinstalling solved it.

@MadDino The build number should not make a difference. Try running it in an administrative command prompt and run the command with ./ In front.

@MadDino Start the device up and the bootloader should be unlocked.

@Balrong Uninstalling core apps is not advised as there is an issue reinstalling them. I would run the device through the installer again and leave the wipe data box unticked to resolve.

@MadDino Check here. Download the unlock.rar file (link still works). You don't need to root the device for UT. Follow these instructions and you need a Windows PC:

*DATA WILL BE WIPED SO MAKE A BACKUP

1. Download this zip(you already have) and you'll get 2 folders 'unlock' and drivers
   https://drive.google.com/open?id=1YpezCedaRWGDS9WW7UaXXyyBod0Bk5qp
2. Install the drivers and go the 'unlock' folder
3. Reboot your phone to fastboot mode by pressing volume up + power on at the same time.
4. Connect it to pc and open unlock.bat in 'unlock' folder
5. Done*

@rocket2nfinity fastboot reboot fastboot will put you to fastbootd and you cannot unlock the bootloader from there.

@hlbkv said:

but on connection it gets back to the generic gear icon.

That's normal restarting the Network Manager.

You can reinstall through the installer leaving the "wipe data" unticked which will retain all your data and take about 10 minutes or in updates change the channel to development and then back again.

@shengchieh It usually means the "OEM unlock" toggle in Developer options has not been set to enable. Other scenarios include old versions of ADB and fastboot on the PC, if in the US, no token .

@hlbkv Have you tried a reinstall?

@hlbkv Is it the TB-X306F or X? I haven't experienced this on Focal or Noble and I am running on Stable. I have seen this on other devices running development and it usually happens after sleep. Have you tried resetting it using network manager?

sudo systemctl restart NetworkManager

What is the device?

@shengchieh are you in the USA? The US devices seem to behave issues unlocking the bootloader. If not, have you enabled developer mode and enabled OEM unlocking there? Edit: I see you have, but double check. If you have downgraded the Android version it automatically relies the bootloader.

@Teasy Hi and welcome to the forums. You can try the update path through software updates on the tablet. The other way requires a Windows PC, the Lenovo Software fix Tool, the devices serial number and a USB cable to attach the device to the PC.

@sysadmin I know, but we all know the situation is complicated at the moment. I hope it gets better for all in the future. Work around have to do...

@sysadmin You could route wifi on the UT device through phone (ahem, Android or Apple) running a VPN as a workround. I know it will be difficult in Russia at the moment, those in charge may even block mirrors, official or community to get you using their apps...

@gus0000 put the device on stock ROM, Android version 9. Don't relock the bootloader. Unzip the vendor image. Use installer version 0.10.0.

@r0lle Had very few issues with installing on Pixel 3a/3a XL. If you get stuck on the Google logo instead of recovery, this may interest you....

@r0lle it is the installing of UT on the UT installer where you will see the check boxes.

@kugiigi Thats the problem, it is not worldwide, it is a countrywide thing and each country and in the US, states, have their own legislation that can impose fines through their own regulatory bodies for what is an infringement of their law. Apple have started a blanket implementation of age id on their latest iteration of iOS. You just have to look at what’s happening in Brazil over their compliance law (lots of gray areas). In the UK Imgur.com have region blocked the UK over the Internet safety Act and age compliance. Then there is Australia.....

There is a lot of naivety amongst politicians over the ramifications of these laws and I would not like to see Ubuntu Touch, let alone any open source project be sanctioned in a country that has decided it does not conform to their laws.