Bluetooth high fidelity chopping up on F13 AMD (7640U). Fedora 41. Sony WH-1000XM4

Framework Laptop 13 Linux
1

  • Which Linux distro are you using?
    Fedora 41, Linux 6.13.6-200.
    WM: Niri (and Hyprland, and GNOME) on Wayland

  • Which BIOS version are you using?
    According to the command on the documentation:
    03.05, built on 2024-03-29
    CPU microcode: 25.116.1

Which Framework Laptop 13 model are you using?

  • AMD 7640U (32 GB of RAM, stock wifi/bluetooth)

Hi I have a problem when using my headphones on my Framework, the sound is chopping up when using ANY High Fidelity Playback codec (SBC,AAC or LDAC). My headphones are working okay they worked on my previous laptop, they work with my phone and with my friend’s phone.

My headphones are the Sony WH-1000XM4. I tried both dual-connection and single-connection. I tried compiling the driver again. Honestly I think it’s not a Fedora issue and is more a Framework issue, hence why I am posting here.

Also related note, my touchpad is really laggy when I connect it at the same time as my headphones (Apple MagicTrackpad USB C) is it a bandwith issue?

If it’s a problem with the wifi/bluetooth module which one would you recommend to upgrade.
Thanks,
Charlotte Thomas.

2

Coincidentally, i have exactly the same hardware and the same issue (chopped up sound). This has started happening with the 6.13 linux kernel release. Last LTS (6.12) is still fine.

Furthermore, when i disconnnect the headphones and reconnect again, the issue is (temporarily, until the next disconnect, or suspend/resume cycle) gone.

Edit: Have the bandwith problem to, “solved” it by connecting via USB.

3

Since the issue is still present with 6.14-rc7, i think this one needs bisecting the 6.13 branch to find the offending commit. IIRC a lot of mediatek wireless drivers work has gone in for 6.13.

4

I see.
It’s good to see I’m not the only one.
The kernel team is probably already aware of the bug? I can’t think we would be the only one? But I really don’t like to go through mailing-lists messages to see if someone reported the bug.

Does the kernel team have a bug tracker? I’m pretty sure it’s only mailing lists, but we’re never sure.

By the way, I tried 6.12, and yes headphones are working. I guess I should close this topic since it’s a kernel issue and not a Framework issue?

5

Apart from filing a reproducible bug yourself, i don’t think there’s a way to know for sure.

Googling for “kernel bug tracker” gives me this [1], you know..

Well, i don’t think there is much framwork can do here, in the same sense as if there were a bug in windows’ bt-subsystem.

Perhaps you might just want to stay on 6.12 until this is resolved, considering this is a LTS release.

[1] https://bugzilla.kernel.org/

edit: BTW, as a workaround, if i disconnect/reconnect the headphones also start working normally..

1 Like
6

Thanks for the discussion.
I filed the bug on the fedora bugzilla. We’ll see if they upstream it to the kernel team.

Thanks for the workarounds.
Charlotte.

7

Without having updated anything, without even rebooting for the last few days, the described issue, which has happened here every time for the last few months, when i reconnected my XM4 headphones after i disconnected my bluetooth earbuds, suddenly has stopped happening completely, as it stands. What can i say..