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Bug#1149377: linux-image-6.12.111+deb13-amd64: Bluetooth no longer works after kernel upgrade

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Control: forwarded -1 https://lore.kernel.org/regressions/9ac1c05b-e9f2-49e9-af63-9cd0e42115fc@gmail.com/

Hi Erik

On Wed, Sep 30, 2026 at 09:59:11PM +0200, Erik Brangs wrote:
> Hi,
> 
> the output of git bisect log is
> 
> git bisect start
> # status: waiting for both good and bad commits
> # bad: [e2acc2211022246c77740d5df08265cc27eedcc5] Linux 6.12.111
> git bisect bad e2acc2211022246c77740d5df08265cc27eedcc5
> # status: waiting for good commit(s), bad commit known
> # good: [f717995cb7dcd8998ab15516b8006aea09cfde0d] Linux 6.12.107
> git bisect good f717995cb7dcd8998ab15516b8006aea09cfde0d
> # bad: [2e3d827cd56865c14f6ca118bbccd7801091fb21] Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths
> git bisect bad 2e3d827cd56865c14f6ca118bbccd7801091fb21
> # bad: [ebc41dfc59d190956e0113e8bd90c28f6f21e8b9] scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read
> git bisect bad ebc41dfc59d190956e0113e8bd90c28f6f21e8b9
> # bad: [af3ce383ba0d0d48957a22ac7058ff5698775898] power: supply: charger-manager: register regulators before exposing sysfs
> git bisect bad af3ce383ba0d0d48957a22ac7058ff5698775898
> # good: [58bcdfb2b2e412088839ae740b1a95154dc0b8d0] nfsd: clear opcnt on compound arg release to prevent OOB read
> git bisect good 58bcdfb2b2e412088839ae740b1a95154dc0b8d0
> # bad: [f4fde735a813705875e836e1dea41a93e994c779] Bluetooth: hci_conn: re-enable advertising only for peripheral role
> git bisect bad f4fde735a813705875e836e1dea41a93e994c779
> # good: [b11a78646c104df205e7eb5903bcce7590396dea] eCryptfs: bound the packet-length peek to the user buffer
> git bisect good b11a78646c104df205e7eb5903bcce7590396dea
> # good: [2ae970ad5adc254360b25d153956009a7d9ee8a2] ARM: 9477/1: Disable broken eBPF JIT on the Risc PC
> git bisect good 2ae970ad5adc254360b25d153956009a7d9ee8a2
> # bad: [d66ceeefb87ddb097b0546bafc581380b816b048] dm-era: fix shadowed superblock leak on take-snap failure
> git bisect bad d66ceeefb87ddb097b0546bafc581380b816b048
> # bad: [32412aff8d11d00672053cb10750869f2de94a1f] Bluetooth: btusb: Add ASUS USB-BT600 for Realtek 8761CU
> git bisect bad 32412aff8d11d00672053cb10750869f2de94a1f
> # good: [fe7ba73dde94c5f413b1588cd444b49105015dda] auxdisplay: charlcd: cancel backlight work on registration failure
> git bisect good fe7ba73dde94c5f413b1588cd444b49105015dda
> # bad: [f05baf6e0680d8c10d2fbbc5953848fc3e3db957] Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU
> git bisect bad f05baf6e0680d8c10d2fbbc5953848fc3e3db957
> # good: [48ca2b8c8a6ba5c26269120c8092db0b617a18a7] block: set QUEUE_FLAG_DYING unconditionally in blk_mark_disk_dead()
> git bisect good 48ca2b8c8a6ba5c26269120c8092db0b617a18a7
> # first bad commit: [f05baf6e0680d8c10d2fbbc5953848fc3e3db957] Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU

Thanks for bisecting, so this looks relatd to the reported regression
https://lore.kernel.org/regressions/9ac1c05b-e9f2-49e9-af63-9cd0e42115fc@gmail.com/
.

Upstrema has queued 4a23ce935f74 ("Bluetooth: btrtl: Add the support
for RTL8761CUV") for the next 6.12.y, can you verify in advance if
that fixes your issue and pick the patch on top?

Regards,
Salvatore

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Bug#1149377: linux-image-6.12.111+deb13-amd64: Bluetooth no longer works after kernel upgrade Salvatore Bonaccorso <carnil@debian.org> - 2026-09-30 17:10 +0200
  Processed: Re: Bug#1149377: linux-image-6.12.111+deb13-amd64:  Bluetooth no longer works after kernel upgrade "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-09-30 17:10 +0200
  Bug#1149377: linux-image-6.12.111+deb13-amd64: Bluetooth no longer works after kernel upgrade Salvatore Bonaccorso <carnil@debian.org> - 2026-09-30 22:30 +0200
    Processed: Re: Bug#1149377: linux-image-6.12.111+deb13-amd64:  Bluetooth no longer works after kernel upgrade "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-09-30 22:30 +0200
    Bug#1149377: linux-image-6.12.111+deb13-amd64: Bluetooth no longer works after kernel upgrade Salvatore Bonaccorso <carnil@debian.org> - 2026-10-01 09:40 +0200

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