I have installed Debian Testing on my laptop, and it's working very well. But there is one thing that is broken. That is Bluetooth, and it doesn't seem to be Debian's fault that it's broken.
I installed Blueman but it immediately crashed. I noticed the red error message in dmesg:
Bluetooth: hci0: don't support firmware rome 0x31010100
The problem seems to be with the chip vendor Qualcomm's habit of re-using identifiers from older chips for new ones, causing the kernel to load the wrong firmware, according to this bug report from 2018, this one from 2106, and this post on GitHubGist. A similar bug was reported recently.
So, if you have installed firmware for an Atheros Rome bluetooth chip in Debian Testing, you may find that it does not work at the moment.
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