My a04 booted fine with the stock sd card, but it prompted me to upgrade ubuntu and once the process was finished the keyboard stopped working. I guess the upgrade broke the keyboard software. I was too lazy to plug in an external keyboard and try to fix it, so I just downloaded the a04 image and flashed it with ‘dd if=img of=/dev/sdcard && sync’, but when I try to boot from it I just get a green power light and I black screen. I read here that the first boot takes a while because it has to grow the file system but I’ve left it for several hours. I tried plugged in with batteries, plugged in without batteries, and unplugged, but no luck. Any ideas?
sdcards aren‘t perfect. Try to flash again and perhaps try another sdcard reader. /dev/sdcard makes me think it is an integrated reader in a notebook?
i did try reflashing it in between some of my attempts. it’s a usb sd card reader, it was really /dev/sd something. My image isn’t named img either, just filler names.
I used etcher instead of dd this time and it worked. Not sure why, I’ve always just used dd for images in the past
When I switch an SD card between devices I perform two full zero wipes on them to ensure there won’t be any errors. This has greatly reduced how often a
dd of an OS image will fail for me.