Ubuntu 21.10. My laptop battery had fully drained and wouldn’t charge at all with several PD chargers I tried. I dug through forums and followed the advice about plugging a “dumb” (non-PD) charger into one side and a PD charger into the other side, and that did the trick. It started charging.
Then, after booting up, I was able to see the Wi-Fi controller in lspci
but it would not show up in the status bar, network manager, iwconfig
, or ifconfig
. Googled for an hour, found nothing useful. Shut down and went to sleep.
The next morning, I booted up (battery now fully charged) and the Wi-Fi magically came back.
NO software updates throughout this entire process.
Can anyone explain what might have happened? I’d hate to be travelling far away and have my Wi-Fi suddenly fail without notice. Is there something that causes the Wi-Fi controller to fail if the battery is below a certain percentage, or some other known quirk?