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I followed some instructions from the raspberry pi site for updating my OS, upon reboot I can no longer connect to WiFi. My WiFi icon in the menu is saying there are "No wireless interfaces found." I have tried to adjust the Localisation, but "Set WiFi Country" is not clickable. My network credentials are correct in the Configuration File. However, in ifconfig there is no wlan interface. I am using a RPi 3 with built in capabilities so there is no dongle. The hardware and power supply have not changed at all since performing the update and there are not messages related to wifi. I have tried a lot of the troubleshooting from this site, but to no avail.

My Pi is running Raspbian GNU/Linux 9.3 (stretch) And my kernel version is 6.1.63-v7+

Thanks! ~Jess

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    What instructions? What did you ACTUALLY do? Stretch is obsolete and hasn't been updated in years. If you have kernel 6.1 you probably used rpi-update and ignored the warnings. Restore from your backup.
    – Milliways
    Nov 28, 2023 at 21:30

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My Pi is running Raspbian GNU/Linux 9.3 (stretch) And my kernel version is 6.1.63-v7+

You have goofed rather badly if your system has stretch installed with a 6.1 kernel. Maybe the "instructions from the raspberry pi site for updating my OS" that you followed weren't clear?

From this point - assuming your "update" was written to your SD card - you have two options:

  1. restore your stretch installation from a backup

  2. install an OS from scratch using the Raspberry Pi Imager*

* If you have any files on your system (SD card) that you want to preserve, you'll need to install your new OS to a second SD card.

If you interact with your RPi through a keyboard and monitor, you might consider downloading the legacy version (bullseye) of the OS. The legacy version will avoid the "hiccups" with Wayland - the X-windows replacement that premieres in bookworm, and possibly get you an OS that's a bit more stable.

If you need help restoring files from your old stretch system (and you installed on a new/different SD card!), you should ask about that in another question.

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