A while ago I did a clean install of Debian 11 with KDE on this dual-boot laptop. The thing is, I've never been able to start bluetooth in it. The W11 OS running in parallel connects just fine, so it's mostly a Debian issue.
Whenever I go to Settings > Bluetooth, the window shows a "Bluetooth is deactivated" message (message might be slightly different than in enUS, I'm using a Spanish localization of the OS). Clicking on the "Activate" button doesn't start anything. Running Bluedevil-wizard opens a window that starts an endless search.
I think it has to do with the firmware. It appears that it didn't install correctly during the setup stage. I think I might need to do a firmware install here but I'm not sure on how to do it in this OS. But, as I said, I'm not entirely sure that's the issue, so some help on how to properly detect the issue and/or install the relevant firmware would be appreciated.
This is the info I thought mostly relevant. I did some clumsy attempts to identify more details, but it might be useless. The extended fumbling attempts to troubleshoot the issue can be found here.
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# uname -a
uname -a: Linux SYSTEM 5.10.0-19-amd64 #1 SMP Debian 5.10.149-2 (2022-10-21) x86_64 GNU/Linux
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# lscpi [abridged]
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
03:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01)
04:00.0 Non-Volatile memory controller: Micron/Crucial Technology Device 540a (rev 01)
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# dmesg | egrep -i 'blue|firm' [abridged]
[ 5.456984] usb 1-8: firmware: failed to load ar3k/AthrBT_0x11020100.dfu (-2)
[ 5.457035] usb 1-8: Direct firmware load for ar3k/AthrBT_0x11020100.dfu failed with error -2
[ 5.457039] Bluetooth: Loading patch file failed
[ 5.841111] r8169 0000:02:00.0: firmware: failed to load rtl_nic/rtl8168g-3.fw (-2)
[ 5.844112] r8169 0000:02:00.0: Direct firmware load for rtl_nic/rtl8168g-3.fw failed with error -2
[ 5.844427] r8169 0000:02:00.0: Unable to load firmware rtl_nic/rtl8168g-3.fw (-2)