Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware)

From	Sasha Levin <sashal@kernel.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware)
Date	2026-10-26 00:40 +0100
Message-ID	<NSfYJ-7Srk-3@gated-at.bofh.it> (permalink)
References	<NSaPr-7PzO-173@gated-at.bofh.it> <NIKr7-2zfo-7@gated-at.bofh.it> <NSaPr-7PzO-173@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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> > If it helps, I can send reverts of 980084de4d9b and 6f0624b4427e
> > (on top of bluetooth.git master, with Cc: stable). Alternatively,
> > btrtl could fall back to the ROM firmware when rtl8761cu_fw.bin
> > is missing.
> I didn't see any regression reports for 7.x releases about those
> changes, [...] So I'm still inclined to say: leave everything as it is
> in mainline to avoid any risk and revert only the backports of those
> two in 6.18.y and 6.12.y.

Yup, that would be appreciated.

-- 
Thanks,
Sasha

Thread

Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Salvatore Bonaccorso <carnil@debian.org> - 2026-10-03 17:20 +0200
  Processed: [regression 6.12.y] After backport of 980084de4d9b  ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not  anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller  (requests firmware) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-10-03 17:20 +0200
  Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Sasha Levin <sashal@kernel.org> - 2026-10-04 18:40 +0200
    Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-10-12 17:40 +0200
      Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-10-13 11:10 +0200
        Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-10-23 15:50 +0200
          Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Sasha Levin <sashal@kernel.org> - 2026-10-24 22:30 +0200
            Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-10-25 19:10 +0100
              Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Sasha Levin <sashal@kernel.org> - 2026-10-26 00:40 +0100
                Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-11-02 12:20 +0100
                Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-11-02 12:20 +0100
            Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2026-10-25 19:10 +0100
              Bug#1149377: [regression 6.12.y] After backport of 980084de4d9b ("Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU") bluethooth not anymore working on 0b05:1bef ASUSTek Computer, Inc. Bluetooth Controller (requests firmware) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-10-25 19:10 +0100

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