fastboot commands time out but devices are visible

Question

I am trying to unlock the bootloader on my Aquarius X Pro 2. I am on Ubuntu and installed fastboot and adb and can connect via adb shell to the device or restart it into bootloader with adb restart bootloader . Also, I unlocked the bootloader in the developer options.

So when I am in the bootloader menu, I can see that the device is locked. I type fastboot devices and get this output: XZ001532 fastboot . So everything seems fine. But if I try any other command, like fastboot flashing unlock_critical or fastboot oem device-info nothing happens or I get a message like "waiting for device".

Anybody an idea what can be the problem here? I resetted the device several times, but that did not help.

Answer 1

Ok, after what felt years of debugging and asking for help, I was finally able to figure out the problem. I installed adb and fastboot from the outdated Ubuntu APT repos via the command line instead of downloading the current Google.zip per wiki install guide link . With the proper tools, everything works now. I hope this helps somebody else to avoid the same mistake in the future.