Hello,
I recently got my Pixel 6a's (running GrapheneOS) screen repaired, and the repairer instructed me to calibrate the fingerprint scanner on the phone in order to use it.

I've tried using Google's calibration tool (https://pixelrepair.withgoogle.com/udfps) and got the phone into fastboot mode with no issues. However, upon trying to connect it, the device does not appear.

Could this be caused by GrapheneOS? Asking this in case I need to flash the stock OS.

7 months later

I just had this exact issue... is it easy to backup a graphene os install? i don't want to have to re-install everything...

  • de0u replied to this.

    Yes you need to flash stock android to calibrate .
    Seedvault back up will do some of the work . make a backup and make sure to try the backup on another device or a new profile . it won't backup photos or texts . backing up photos is easy to a PC , I use SMS import/export from fdroid to backup texts .
    Follow grapheneos steps to flash stock android .

    Schammy I have a faint memory that somebody reported that running the Google recalibration tool once did not work but that running it twice did, so it wasn't necessary to re-flash. But I can't find that thread.

    It is a little surprising if the tool does not see your device. But it might help if you said which OS and which browser you tried with.

      I have recently done a screen replacement of my own Google Pixel 6 myself, and I also struggled with this issue, but managed to get it working in the end.

      The reason the tool isn't seeing your phone is probably because you need to download the Google USB driver. I did not find a way to use Linux for installing the driver, so probably best if you use Windows for this.

      I found the answers of my issue in an iFixit article, so I recommend taking a look at the solution in the article.

      Two things I did not understand from the article at first was that I needed to use Windows and where I could download the driver, but when you managed to install the driver successfully and boot into fast boot, your phone should display in the Pixel calibration tool.

      After that you should run the tool twice like de0u said and your fingerprint scanner should work again.

      Good luck and I hope this works for you. Otherwise I'd recommend contacting the seller where you bought your screen from as this isn't a GrapheneOS issue only, because Pixels with the stock Google OS also have these issues after a screen replacement.