Trying to install grapheneos on a refurbished Pixel 6, and "fastboot flashing unlock" hangs "< waiting for any device >.
OEM unlocking is enabled.
USB debugging is enabled.
With Android running, "adb devices" sees the Pixel, displays:
List of devices attached
[serial number] device
When I boot to the bootloader, "adb devices" does not see the Pixel, but "fastboot devices" displays:
[serial number] fastboot
But "fastboot flashing unlock" displays:
< waiting for any device >
And nothing happens. Same result with any other fastboot action command, e.g. "fastboot reboot bootloader".
Android Debug Bridge version 1.0.41
fastboot version 33.0.3-8952118
I successfully flashed a Pixel 3a with Ubuntu Touch a few days ago, so this appears to be specific to the Pixel 6, or perhaps this particular Pixel 6.
Has anyone encountered this problem and fixed it?