Greetings all,
For the short read, go to the solution.
Another new member here. I went through some difficulty with a Pixel 3a XL I got from eBay on Monday but it turned into a success. I had tried to flash it roughly 20 times and to no avail, I could only get to the “Google” screen after flashing firmware and would loose connection to the phone, it would not boot into recovery mode. I would then have to flash PQ3B.190801.002 again and start over as the phone would be stuck in a boot loop at fastboot. I was using the recent 0.9.1 installer.
I tried three different linux computers and a Windows virtual machine. Tried USB-C to USB-C, USB-A to C and changed everything I could. I tried the .deb install of the installer and the Snap, and of course the Windows installer. I searched all of the forums and internet that I could and tried everything I could come up with. Locked the bootloader, unlocked it several times and ran all kinds of combinations. Flashed from the Google site in Vivaldi browser and Google browser, and flashed it manually. The ./flash-all.sh script would not work and would only return “Fastboot is to old, Download a new one” so I just ran the commands in the script and that worked for Android 9...yet nothing seemed to get me to recovery mode.
Solution:
This morning I decided to download an older installer, 0.8.8, this time an appimage, just to try it but I had to flash PQ3B.190801.002 again before doing so. This time I ticked the boxes on the Google site for “Disable verity” and “Disable verify vbmeta”, at least I think that is what they were called, I also ticked the boxes for “Force flash” and “Wipe data” which I had done several times already. I don’t think it really had anything to do with the old installer but the disabling of verifying things that got it to work, and it worked fast.
Very happy with the results. The phone flies, waydroid works well and even installed Futify which also works well. I’m happy with all functions of the phone I need so far. It’s gone much better than expected after figuring out the install.
I had seen in my internet searches that others were getting stuck on the same spot that I did, so I thought I would throw my two pennies in the hat.
Thanks for all the direction, it all helped!