I wanted to use an older Raspbian 9 (Stretch) version of 2017/2018 because I wanted to use the "perf" tool which is not available for the current version.

But the previous version was not able to boot by Raspberry Pi 3A+ (no green / ACT light on Raspberry Pi 3A+).

Hence I inserted that SD card in Raspberry Pi Zero and ran commands:

sudo apt-get update
sudo apt-get install --reinstall raspberrypi-bootloader raspberrypi-kernel

Then after that I removed that SD card and inserted in my Raspberry Pi 3A+. The green light was attained successfully, but then my Raspberry Pi 3A+ was not able to connect to my Wi-Fi router.

I again copied/inserted ssh (without any extension) and wpa_supplicant.conf file in the SD card; and re-inserted it into the Raspberry Pi 3A+, but still I couldn't make it connect to my Wi-Fi router.

What could be possibly wrong in my procedure?

  • Have you set the country code in wpa_supplicant.conf? What is this perf tool that apparently isn't available in buster? Aug 1 '20 at 9:16
  • @JaromandaX yes I did set the country code in supplicant file. perf is a performance analysing tool which is available just for a very few kernel versions. I did try to make it work for the latest versions, but it won't. Aug 17 '20 at 11:50

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