[PATCH] Bluetooth: btusb: Add device ID for Realtek RTL8761BUE (StarTech AV53C1)

[PATCH] Bluetooth: btusb: Add device ID for Realtek RTL8761BUE (StarTech AV53C1)

[Nikolaj Klitlund Børty via B4 Relay]

From: Nikolaj Klitlund Børty <nbn@sj.dk>

Add the USB ID 0x14b0:0x047a for the StarTech AV53C1-USB-BLUETOOTH
adapter, a Realtek RTL8761BUE based Bluetooth 5.3 dongle.

Without this entry btusb treats the device as a generic Bluetooth
adapter and never loads the Realtek firmware, leaving the controller on
its ROM firmware. In that state it advertises and scans actively, but
never reports advertisements during passive scanning. LE connections
initiated by the kernel wait for a passive-scan report before issuing
LE Create Connection, so connecting and pairing from BlueZ time out
without any error from the controller.

The same product is also sold with the ID 0x2c0a:0x8761, which is
already supported.

lsusb -v output for the device:

Bus 001 Device 010: ID 14b0:047a StarTech.com Ltd. Bluetooth Radio
Device Descriptor:
  bcdUSB               1.10
  bDeviceClass          224 Wireless
  bDeviceSubClass         1 Radio Frequency
  bDeviceProtocol         1 Bluetooth
  idVendor           0x14b0 StarTech.com Ltd.
  idProduct          0x047a
  bcdDevice            2.00
  iManufacturer           1 Realtek
  iProduct                2 Bluetooth Radio
  iSerial                 3 00E04C239987
  bNumInterfaces          2
    Interface Descriptor:
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth

Cc: stable@vger.kernel.org
Signed-off-by: Nikolaj Klitlund Børty <nbn@sj.dk>
---
Tested on Home Assistant OS 18.2 (kernel 6.18.39): without this entry the
adapter enumerates and scans, but btusb never loads rtl_bt/rtl8761bu_fw.bin,
and LE connections from BlueZ never complete because the controller reports
no advertisements during passive scanning. Details in the commit message.
---
 drivers/bluetooth/btusb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index d70a3e7a13f5d18c75bc1c9fbc1ac5706e832f61..c3c581a5adbb09f7118a3932cdda210d68d2336d 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -860,6 +860,8 @@ static const struct usb_device_id quirks_table[] = {
 						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x37ad, 0x0600), .driver_info = BTUSB_REALTEK |
 						     BTUSB_WIDEBAND_SPEECH },
+	{ USB_DEVICE(0x14b0, 0x047a), .driver_info = BTUSB_REALTEK |
+						     BTUSB_WIDEBAND_SPEECH },
 
 	/* Additional Realtek 8761CU Bluetooth devices */
 	{ USB_DEVICE(0x0b05, 0x1bef), .driver_info = BTUSB_REALTEK |

---
base-commit: 4d7d9486c04d917265f64c55bd23b2cc4fe7749c
change-id: 20260905-startech-av53c1-1b4e53f251c7

Best regards,
-- 
Nikolaj Klitlund Børty <nbn@sj.dk>

RE: Bluetooth: btusb: Add device ID for Realtek RTL8761BUE (StarTech AV53C1)

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 1873 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=1158610

---Test result---

Test Summary:
CheckPatch                    FAIL      0.57 seconds
VerifyFixes                   PASS      0.08 seconds
VerifySignedoff               PASS      0.08 seconds
GitLint                       PASS      0.21 seconds
SubjectPrefix                 PASS      0.07 seconds
BuildKernel                   PASS      28.62 seconds
CheckAllWarning               PASS      31.60 seconds
CheckSparse                   PASS      30.19 seconds
BuildKernel32                 PASS      28.04 seconds
CheckKernelLLVM               SKIP      0.00 seconds
TestRunnerSetup               PASS      517.14 seconds
IncrementalBuild              PASS      27.27 seconds

Details
##############################
Test: CheckPatch - FAIL
Desc: Run checkpatch.pl script
Output:
Bluetooth: btusb: Add device ID for Realtek RTL8761BUE (StarTech AV53C1)
WARNING: The commit message has 'stable@', perhaps it also needs a 'Fixes:' tag?

total: 0 errors, 1 warnings, 8 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

/github/workspace/src/patch/14793004.patch has style problems, please review.

NOTE: Ignored message types: UNKNOWN_COMMIT_ID

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.


##############################
Test: CheckKernelLLVM - SKIP
Desc: Build kernel with LLVM + context analysis
Output:
Clang not found


https://github.com/bluez/bluetooth-next/pull/708

---
Regards,
Linux Bluetooth

Re: [PATCH] Bluetooth: btusb: Add device ID for Realtek RTL8761BUE (StarTech AV53C1)

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Sat, 05 Sep 2026 14:05:12 +0200 you wrote:
> From: Nikolaj Klitlund Børty <nbn@sj.dk>
> 
> Add the USB ID 0x14b0:0x047a for the StarTech AV53C1-USB-BLUETOOTH
> adapter, a Realtek RTL8761BUE based Bluetooth 5.3 dongle.
> 
> Without this entry btusb treats the device as a generic Bluetooth
> adapter and never loads the Realtek firmware, leaving the controller on
> its ROM firmware. In that state it advertises and scans actively, but
> never reports advertisements during passive scanning. LE connections
> initiated by the kernel wait for a passive-scan report before issuing
> LE Create Connection, so connecting and pairing from BlueZ time out
> without any error from the controller.
> 
> [...]

Here is the summary with links:
  - Bluetooth: btusb: Add device ID for Realtek RTL8761BUE (StarTech AV53C1)
    https://git.kernel.org/bluetooth/bluetooth-next/c/76b8d73b706e

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
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