I flashed a graphene on Ubuntu just yesterday. Like you it didn't connect immediately to a browser. Some things to think about:
  • Flatpak installs of browsers are sandboxed and won't connect to USB so easily
  • So just install the browser fully / directly, as described here: https://brave.com/linux/
  • You may need this package also: sudo apt install adb
  • You may need to run this (as described on graphene install page): echo 0 | sudo tee /sys/bus/usb/drivers_autoprobe
  • After all this, reboot the machine
all the above, plus the android sdk you already installed (sudo apt install android-sdk-platform-tools-common) should be enough to get you going!
Good luck, graphene is awesome
In case this post starts getting bookmarked as a guide for people switching to graphene, it's only fair for me to start spreading these sats around!
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Thankyou!
Just to add, for visitors benefit - all my points (except the adb package) are mentioned on the graphene install page
The official website is full of interesting / relevant information, and deserves a good / solid read, even if you're not interested in Graphene itself.
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Thank you! I wish I would have seen your reply before borrowing my daughter's Mac. You provided a few tips I wasn't aware of.
I now have graphene installed, but it feels like cheating using an Apple product.
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To use a shitcoin-browser isn't better...