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[SOLVED] Bluetooth does not work
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ngahy
n00b
n00b


Joined: 12 Aug 2021
Posts: 31
PostPosted: Sun Aug 15, 2021 7:58 pm    Post subject: [SOLVED] Bluetooth does not work Reply with quote
Hello,
I am trying to enable bluetooth but it does not work.

* When I run rfkill list, sometime this line "795: hci0: Bluetooth" appears, sometime not.
For instance, I ran it three time here:
Code:
$ sudo rfkill list
1: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
3: dell-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
4: dell-bluetooth: Bluetooth
   Soft blocked: no
   Hard blocked: no
$ sudo rfkill list
1: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
3: dell-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
4: dell-bluetooth: Bluetooth
   Soft blocked: no
   Hard blocked: no
795: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no
$ sudo rfkill list
1: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no
3: dell-wifi: Wireless LAN
   Soft blocked: no
   Hard blocked: no
4: dell-bluetooth: Bluetooth
   Soft blocked: no
   Hard blocked: no


* sudo lsmod | grep bluetooth
Code:
bluetooth             737280  11 btrtl,btintel,btbcm,bnep,btusb
ecdh_generic           16384  1 bluetooth
rfkill                 28672  7 bluetooth,dell_laptop,dell_rbtn,cfg80211


* sudo lspci | grep blue returns nothing

* sudo hciconfig returns nothing

* sudo hcitool dev
Code:
Devices:


* sudo dmesg | grep Blue
Code:
[  708.568735] Bluetooth: hci0: Intel reset sent to retry FW download
[  709.135496] Bluetooth: hci0: Reading Intel version information failed (-22)
[  709.135497] Bluetooth: hci0: Intel Read version failed (-22)
[  709.135590] Bluetooth: hci0: Intel reset sent to retry FW download
[  709.701452] Bluetooth: hci0: Reading Intel version information failed (-22)
[  709.701453] Bluetooth: hci0: Intel Read version failed (-22)
[  709.701460] Bluetooth: hci0: Intel reset sent to retry FW download


* Using bluetoothctl:
Code:
$ bluetoothctl
Agent registered
[bluetooth]# power on
No default controller available


How can I get a working bluetooth?
Thank you

Last edited by ngahy on Tue Sep 07, 2021 7:56 pm; edited 1 time in total
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Jaglover
Watchman
Watchman


Joined: 29 May 2005
Posts: 8291
Location: Saint Amant, Acadiana
PostPosted: Sun Aug 15, 2021 8:49 pm    Post subject: Reply with quote
You better put the whole dmesg into pastebin (use wgetpaste).
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ngahy
n00b
n00b


Joined: 12 Aug 2021
Posts: 31
PostPosted: Sun Aug 15, 2021 9:00 pm    Post subject: Reply with quote
Jaglover wrote:
You better put the whole dmesg into pastebin (use wgetpaste).


Here it is: https://pastebin.com/u9Kfu4Kn
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ngahy
n00b
n00b


Joined: 12 Aug 2021
Posts: 31
PostPosted: Tue Sep 07, 2021 7:56 pm    Post subject: Reply with quote
From this forum post https://community.frame.work/t/linux-users-dont-upgrade-to-5-13/3874
it looks like the Intel AX210 card does not work with Linux Kernel <= 5.11 and Linux
Kernel >=5.13.

Thanks to this answer: https://community.frame.work/t/linux-users-dont-upgrade-to-5-13/3874/20
I downloaded sys-kernel/gentoo-kernel-bin:5.12.19 and the card seems to work with it.
It is directly detected by bluetoothctl and you just need to connect with your device.

For the wifi, I removed /lib/firmware/iwlwifi-ty-a0-gf-a0.pnvm as suggested here:
https://bugzilla.kernel.org/show_bug.cgi?id=212371#c13
However, I needed to put the file back to have a working wifi.

Both wifi and bluetooth are working now. I still have an issue: my headphones and my computer
are disconnected periodically. It seems to be an issue with these cards used for both wifi and
bluetooth.
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