╰─ hciconfig hci0 -a
hci0: Type: Primary Bus: USB
BD Address: 9C:B6:D0:E2:25:58 ACL MTU: 1024:8 SCO MTU: 50:8
UP RUNNING PSCAN
RX bytes:54258861 acl:42 sco:1063465 events:11592 errors:0
TX bytes:54182045 acl:78 sco:1061223 commands:11381 errors:143
Same for pretty much all my bluetooth headsets (Skullcandy Uproar
Wireless, Plantronics E50 or M70 & others).
On Ubuntu 20.10, kernel Linux 5.7.0-050700-generic
01.07.2020 12:02pulseaudio SCO packet received of unaligned size: 5
01.07.2020 12:02kernel Bluetooth: hci0: SCO
Same for Sennheiser MOMENTUM M2 AEBT in Ubuntu 20.04
ii bluez 5.53-0ubuntu3 amd64 Bluetooth tools and daemons
ii bluez-cups 5.53-0ubuntu3 amd64 Bluetooth printer driver for CUPS
ii bluez-obexd 5.53-0ubuntu3 amd64 bluez obex daemon
ii libbluetooth3:amd64 5.53-0ubuntu3 amd64 Library to use the
wait a minute... is this bug existend about 5 years, and nobody fixed
it? same crap here,
i built 5.3 kernel month ago, but problem is not with kernel, maybe
with usb driver module, or something.
dmesg -l err:
[ 11.456051] ccp :27:00.2: sev command 0x4 timed out, disabling PSP
[
** Tags added: cscc
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https://bugs.launchpad.net/bugs/1430696
Title:
Bluetooth audio instability: Bluetooth: hci0 SCO packet for unknown
connection handle
Status in
Same problem here on a DELL Latitude E7440 with Linux Mint 17.3 (based on
Ubuntu 14.04 LTS) installed.
When I use a Plantronics Voyager which connects directly to the notebook's
internal bluetooth chip, I get these dmesg entries:
$ dmesg | grep -i Bluetooth
[3.994061] Bluetooth: Core ver
This occurred to me. The log files got around 15GB. I had to enable
$RepeatedMsgReduction in rsyslogd in order to avoid filling my disk.
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Same here on Ubuntu 17.10 using kernel 4.15
dmesg:
[ 177.004739] Bluetooth: hci0: last event is not cmd complete (0x0f)
[ 180.384766] Bluetooth: hci0: SCO packet for unknown connection handle 0
[ 180.384861] Bluetooth: hci0: SCO packet for unknown connection handle 0
[ 180.384941] Bluetooth:
Same here.
demesg output:
[556791.335123] Bluetooth: hci0 SCO packet for unknown connection handle 0
[556791.335127] Bluetooth: hci0 SCO packet for unknown connection handle 0
[556791.345111] Bluetooth: hci0 SCO packet for unknown connection handle 0
[556791.345115] Bluetooth: hci0 SCO packet
Same problem here.
HP ProBook 450 g4, Intel Corporation Wireless 7265, 4.10.0-28-generic, Sony
SRS-XB2 . Sometimes its worked yet, but usually not. Of course with same config.
pacmd say:
>>> set-card-profile 1 a2dp_sink
Failed to set card profile to 'a2dp_sink'
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I'm having the same problem when connecting a pair of Philips SHB5950
headphones to the integrated Bluetooth controller of a Dell XPS 15 9550 (BIOS
version 01.00.07).
Upstream kernels 4.6.x, 4.7.x and 4.8.x all give the same problem: the
headphones pair and work fine in HSP mode, but will not
Same here, connecting a Thinkpad T420 to JBL Flip 2 speaker.
A BT dongle seems to work problem-free.
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Title:
Bluetooth audio
See the same under 15.04 running
Linux harenber-ThinkPad-X1-Carbon-3rd 3.19.0-18-generic #18-Ubuntu SMP
Tue May 19 18:31:35 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
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[ 2874.136892] Bluetooth: hci0 SCO packet for unknown connection handle 0
[ 2874.136893] Bluetooth: hci0 SCO packet for unknown connection handle 0
[ 2874.136894] Bluetooth: hci0 SCO packet for unknown connection handle 0
[ 2874.136895] Bluetooth: hci0 SCO packet for unknown connection handle 0
[
I have installed latest mainline kernel and will test next this week.
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https://bugs.launchpad.net/bugs/1430696
Title:
Bluetooth audio instability: Bluetooth: hci0 SCO
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.0 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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Title:
Bluetooth audio instability: Bluetooth: hci0 SCO packet for
I'd like to add that i have now a different laptop (Lenovo E540) than
previously, so the bug most probably isn't in the general bluetooth
hardware drivers. Other people suffer from the bug with a large variety
of hardware.
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