[Networking] Realtek RTL8852CE Bluetooth not working on laptop / Laptop Issues / Arch Linux Forums
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[Solved] cross-posted from: https://lemmy.world/post/41957406

Exact problem as this archwiki forum post

I have also tried everything and at last here I am asking for any help, otherwise I don’t think I would be able to continue using Linux on this laptop. I’ve tried everything from changing the kernel package to enabling all firmwares to using every kernel parameter I can find everything, nothing says any error or something anywhere. Only error i can find is hci device capabilities -22

Edit: The patch i needed was to add the driver info in btusb.c file. In nixos this is how you do it

  boot = {
    kernelPatches = [
      {
        name = "add-realtek-8852ce-btusb";
        patch = ./btusb.patch;
      }
    ];
}

first what you should do is git clone the linux kernel version you are using check using uname -r for me it was 6.12.(whatever, doesn’t matter)

git clone --depth=1 git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git v6.12

then find the btusb.c file in drivers/bluetooth/ and add the line

{ USB_DEVICE(0x13d3, 0x3612), .driver_info = BTUSB_REALTEK |
BTUSB_WIDEBAND_SPEECH },

after these lines

static const struct usb_device_id quirks_table[] = {
 						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x0cb8, 0xc558), .driver_info = BTUSB_REALTEK |
 						     BTUSB_WIDEBAND_SPEECH },

now we have made chages to this file right? it will be shows in git diff, so now you should be able to do git diff > btusb.patch this will create a .patch file, now copy this file to wherever folder you put the nixos configuration in, most likely /etc/nixos if not using custom config. Thats it!, now rebuild the configuration and DONE. props to @Maiq.

Author of patch: vedantsg123

I will try to get this patch upstream to not having to do this manually.

  • Yash Raj@lemmy.worldOP
    2·
    1 day ago

    So fast. Wow I couldn’t even find that resource in all my searching. So Nows the tough part, I hoped I was an expert nixos user. I will try to implement this somehow (cough vibe code), but any more hints would be appreciated. One thing I know the direction to go is patching kernel, which I have seen a repo do, so I will try to copy that.

    • Maiq@piefed.socialEnglish
      2·
      1 day ago

      I have no nixos experience so I would not be the best person to ask. You could try asking a new question on lemmy with the updated info asking for nixos specific help on the best way to translate the github gist to something a bit more familiar to you.

      You might be able to ask the author of the github gist for advice?

      Glad I could at least hopefully point you in the right direction.

          • Yash Raj@lemmy.worldOP
            2·
            1 day ago

            Brother guess what? It actually fixed it. OMG I am soo happy, at last it got fixed, i was trying it for the last week and didn’t work, but you swoop and in an instant fixed it. I just can’t thank you enough really. I am really greatful to you.

            • Maiq@piefed.socialEnglish
              2·
              1 day ago

              I just pointed you in the right direction. You did all the work. Glad to hear you got it going. This is the only drawback to buying niche laptops. They often require a bit of tinkering for a year or two while kernels get patched.

              Nice write up by the way, might help the next person.

              • Yash Raj@lemmy.worldOP
                2·
                22 hours ago

                Still if not for you, all efforts would have been futile. Thank you for your valuable inputs.