* [Bug 80791] Lot of "hci0 sco packet for unknown connection handle"
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@ 2014-07-26 20:40 ` bugzilla-daemon
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From: bugzilla-daemon @ 2014-07-26 20:40 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
Nadia Yvette Chambers <nadia.yvette.chambers@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nadia.yvette.chambers@gmail
| |.com
--- Comment #1 from Nadia Yvette Chambers <nadia.yvette.chambers@gmail.com> ---
I can reproduce this on a Lenovo x100e on 3.16.0-rc6 plus some git.
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From: bugzilla-daemon @ 2023-09-05 10:06 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
Artem S. Tashkinov (aros@gmx.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |caravena@gmail.com
--- Comment #2 from Artem S. Tashkinov (aros@gmx.com) ---
*** Bug 85161 has been marked as a duplicate of this bug. ***
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From: bugzilla-daemon @ 2023-09-05 10:06 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #3 from Artem S. Tashkinov (aros@gmx.com) ---
*** Bug 90151 has been marked as a duplicate of this bug. ***
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From: bugzilla-daemon @ 2023-09-05 10:09 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #4 from Artem S. Tashkinov (aros@gmx.com) ---
This is still relevant as of 6.4.14.
There's absolutely no need to log this message more than once or ever.
The kernel doesn't log TCP packets being dropped/lost/whatever.
There's no need to log bluetooth's packets either unless debugging has been
enabled.
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To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
Artem S. Tashkinov (aros@gmx.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Kernel Version|3.0.35 |GIT
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From: bugzilla-daemon @ 2023-09-05 10:12 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #5 from Artem S. Tashkinov (aros@gmx.com) ---
In 6.4 the message is slightly different:
Aug 28 11:13:15 hp kernel: Bluetooth: hci0: ACL packet for unknown connection
handle 3837
| wc -l -> 25 for August 28 alone.
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To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
Artem S. Tashkinov (aros@gmx.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Lot of "hci0 sco packet for |"Bluetooth: hci0: ACL
|unknown connection handle" |packet for unknown
| |connection handle" must be
| |hidden behind "debug"
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From: bugzilla-daemon @ 2023-09-08 10:24 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
Artem S. Tashkinov (aros@gmx.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |luiz.dentz@gmail.com
--- Comment #6 from Artem S. Tashkinov (aros@gmx.com) ---
Luiz,
Could you look into this please?
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From: bugzilla-daemon @ 2023-10-27 8:36 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
Artem S. Tashkinov (aros@gmx.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aros@gmx.com
--- Comment #7 from Artem S. Tashkinov (aros@gmx.com) ---
When connecting my laptop to my smartphone I get this message almost every 2
seconds.
I don't think the user can even do anything about it, could you please show it
_just once_?
[278536.979041] input: Smartphone X (AVRCP) as /devices/virtual/input/input20
[278557.775313] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278573.330987] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278574.837013] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278577.025169] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278579.533122] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278587.617396] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278601.656461] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278603.847227] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278605.494469] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278607.640811] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278609.998596] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278611.898942] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278626.172392] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278627.966819] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278630.108002] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278634.449240] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278637.205311] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278639.417526] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278650.205987] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278651.664703] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278659.509455] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278661.063814] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278663.972533] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278666.922671] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278669.291930] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278673.299147] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278675.681829] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278693.982873] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278695.476906] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[278703.181558] Bluetooth: hci0: ACL packet for unknown connection handle 3837
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From: bugzilla-daemon @ 2023-10-27 8:38 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #8 from Artem S. Tashkinov (aros@gmx.com) ---
Is this mailing list still relevant/active/actual or I should CC different
people?
This bug report has received zero attention from kernel Bluetooth developers
and it seems to be trivial to fix.
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From: bugzilla-daemon @ 2023-10-27 8:39 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #9 from Artem S. Tashkinov (aros@gmx.com) ---
The issue has now been known for close to a decade.
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To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #10 from Artem S. Tashkinov (aros@gmx.com) ---
Sorry for a flood of messages but I really want this issues to be attended.
Otherwise multiple people have a flood of useless messages in their kernel log.
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From: bugzilla-daemon @ 2025-09-05 23:17 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
Jakub Jankiewicz (jcubic@onet.pl) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jcubic@onet.pl
--- Comment #11 from Jakub Jankiewicz (jcubic@onet.pl) ---
I have a similar issue. My hardware:
laptop Lenovo Legion Pro 5 16IAX10 Ultra 7 255HX (from 2025)
System Fedora 42 Xfce.
uname -a
Linux jcubic 6.16.4-200.fc42.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Aug 28 19:47:10
UTC 2025 x86_64 GNU/Linux
My Bluetooth Adapter:
Bus 003 Device 007: ID 0489:e111 Foxconn / Hon Hai Wireless_Device
dmesg output
[ 49.567615] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 599.542960] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 1437.569560] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 3859.566676] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 4453.577203] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 4567.071519] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 4924.313398] usb 3-10: USB disconnect, device number 5
[ 5240.053501] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 5628.063962] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 5949.560492] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 6101.594003] perf: interrupt took too long (2534 > 2500), lowering
kernel.perf_event_max_sample_rate to 78000
[ 7169.561230] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 7223.579889] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 9081.183509] perf: interrupt took too long (3191 > 3167), lowering
kernel.perf_event_max_sample_rate to 62000
[ 9387.061556] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[ 9403.597909] i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on pipe A
(start=1409651 end=1409652) time 125 us, min 1574, max 1600, scanline start
1572, end 1573
[ 9674.574688] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[10152.077253] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[11119.576619] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[12687.069915] Bluetooth: hci0: ACL packet for unknown connection handle 3837
[14921.072319] perf: interrupt took too long (3990 > 3988), lowering
kernel.perf_event_max_sample_rate to 50000
[20399.081113] Bluetooth: hci0: ACL packet for unknown connection handle 3837
All Bluetooth entries marked in red
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From: bugzilla-daemon @ 2025-09-10 22:05 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #12 from Jakub Jankiewicz (jcubic@onet.pl) ---
I think this is a real bug, I've just noticed with latest Kernel 6.16.5 (Fedora
testing 6.16.5-200.fc42.x86_64), the music I play via Bluetooth speakers is
interrupted when this happens. And it happens a lot. So this is a bug in the
driver that needs to be fixed, not hidden.
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From: bugzilla-daemon @ 2025-09-11 11:19 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #13 from Artem S. Tashkinov (aros@gmx.com) ---
(In reply to Jakub Jankiewicz from comment #12)
> I think this is a real bug, I've just noticed with latest Kernel 6.16.5
> (Fedora testing 6.16.5-200.fc42.x86_64), the music I play via Bluetooth
> speakers is interrupted when this happens. And it happens a lot. So this is
> a bug in the driver that needs to be fixed, not hidden.
Open a new bug report and specify your HW.
Also make sure Windows is not affected.
If it's a regression, please bisect:
https://docs.kernel.org/admin-guide/bug-bisect.html
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From: bugzilla-daemon @ 2025-09-11 11:58 UTC (permalink / raw)
To: linux-bluetooth
https://bugzilla.kernel.org/show_bug.cgi?id=80791
--- Comment #14 from Jakub Jankiewicz (jcubic@onet.pl) ---
Already reported:
https://bugzilla.kernel.org/show_bug.cgi?id=220564
But I'm not sure about Windows, the laptop was without OS. And I installed
Fedora on it.
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