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kernel: hci_scodata_packet: hci1 SCO packet for unknown connection handle 0

Bluez-devel Stefan Seyfried 2 participants 9 messages Jul 7, 2006 – Jul 18, 2006 Bluetooth drivers

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#0 lore raw

Hi,

i have an el-cheapo USB BT dongle in front of me that throws an endless stream of
kernel: hci_scodata_packet: hci1 SCO packet for unknown connection handle 0 after inserting it into the USB port, unless i do
echo 1 > /sys/module/hci_usb/parameters/isoc

I don't know about the usual practice in such cases: do those devices get blacklisted in the drivers? If yes, what information should i provide to get it into the blacklist?
-- =

Stefan Seyfried \ "I didn't want to write for pay. I
QA / R&D Team Mobile Devices \ wanted to be paid for what I write."
SUSE LINUX Products GmbH, N=FCrnberg \ -- Leonard Cohen

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#1 lore raw

Hi Stefan,

Quoted 9 lines

i have an el-cheapo USB BT dongle in front of me that throws an endless stream of
kernel: hci_scodata_packet: hci1 SCO packet for unknown connection handle 0 after inserting it into the USB port, unless i do
echo 1 > /sys/module/hci_usb/parameters/isoc

I don't know about the usual practice in such cases: do those devices get blacklisted in the drivers? If yes, what information should i provide to get it into the blacklist?

what does "hciconfig -a" tells you about this dongle? The content from /proc/bus/usb/devices for this device might also be helpful.

Regards

Marcel

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#2 lore raw

Hi,

Quoted 6 lines · Marcel Holtmann

Hi Stefan,
=

Quoted 3 lines

i have an el-cheapo USB BT dongle in front of me that throws an endless stream of
kernel: hci_scodata_packet: hci1 SCO packet for unknown connection hand=

le 0

Quoted 5 lines
Quoted 5 lines

after inserting it into the USB port, unless i do
echo 1 > /sys/module/hci_usb/parameters/isoc
=

I don't know about the usual practice in such cases: do those devices g=

et

Quoted 5 lines
Quoted 2 lines

blacklisted in the drivers? If yes, what information should i provide to get it into the blacklist?

=

what does "hciconfig -a" tells you about this dongle? The content

root@strolchi:~# hciconfig -a hci1
hci1:   Type: USB
        BD Address: 00:0C:78:31:11:0A ACL MTU: 339:4 SCO MTU: 60:9
        UP RUNNING
        RX bytes:419 acl:0 sco:0 events:19 errors:0
        TX bytes:319 acl:0 sco:0 commands:17 errors:0
        Features: 0xff 0xff 0x81 0x00 0x18 0x18 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'BlueZ strolchi (1)'
        Class: 0x100100
        Service Classes:
        Device Class: Computer, Uncategorized
        HCI Ver: 1.2 (0x2) HCI Rev: 0x222 LMP Ver: 1.2 (0x2) LMP Subver: 0x=
222
        Manufacturer: RTX Telecom A/S (21)
Quoted 1 line

from /proc/bus/usb/devices for this device might also be helpful.

T: Bus=3D02 Lev=3D01 Prnt=3D01 Port=3D00 Cnt=3D01 Dev#=3D 3 Spd=3D12 MxC= h=3D 0

D:  Ver=3D 1.10 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 MxPS=3D 8 #Cfgs=3D  1
P:  Vendor=3D0400 ProdID=3D080a Rev=3D 1.00
C:* #Ifs=3D 2 Cfg#=3D 1 Atr=3D80 MxPwr=3D  0mA
I:  If#=3D 0 Alt=3D 0 #EPs=3D 3 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 Driver=
=3Dhci_usb
E:  Ad=3D81(I) Atr=3D03(Int.) MxPS=3D  64 Ivl=3D1ms
E:  Ad=3D82(I) Atr=3D02(Bulk) MxPS=3D  64 Ivl=3D0ms
E:  Ad=3D02(O) Atr=3D02(Bulk) MxPS=3D  64 Ivl=3D0ms
I:  If#=3D 1 Alt=3D 0 #EPs=3D 2 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 Driver=
=3Dhci_usb
E:  Ad=3D83(I) Atr=3D01(Isoc) MxPS=3D   0 Ivl=3D1ms
E:  Ad=3D03(O) Atr=3D01(Isoc) MxPS=3D   0 Ivl=3D1ms
I:  If#=3D 1 Alt=3D 1 #EPs=3D 2 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 Driver=
=3Dhci_usb
E:  Ad=3D83(I) Atr=3D01(Isoc) MxPS=3D   9 Ivl=3D1ms
E:  Ad=3D03(O) Atr=3D01(Isoc) MxPS=3D   9 Ivl=3D1ms
I:  If#=3D 1 Alt=3D 2 #EPs=3D 2 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 Driver=
=3Dhci_usb
E:  Ad=3D83(I) Atr=3D01(Isoc) MxPS=3D  17 Ivl=3D1ms
E:  Ad=3D03(O) Atr=3D01(Isoc) MxPS=3D  17 Ivl=3D1ms
I:  If#=3D 1 Alt=3D 3 #EPs=3D 2 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 Driver=
=3Dhci_usb
E:  Ad=3D83(I) Atr=3D01(Isoc) MxPS=3D  25 Ivl=3D1ms
E:  Ad=3D03(O) Atr=3D01(Isoc) MxPS=3D  25 Ivl=3D1ms
I:  If#=3D 1 Alt=3D 4 #EPs=3D 2 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 Driver=
=3Dhci_usb
E:  Ad=3D83(I) Atr=3D01(Isoc) MxPS=3D  33 Ivl=3D1ms
E:  Ad=3D03(O) Atr=3D01(Isoc) MxPS=3D  33 Ivl=3D1ms
I:  If#=3D 1 Alt=3D 5 #EPs=3D 2 Cls=3De0(unk. ) Sub=3D01 Prot=3D01 Driver=
=3Dhci_usb
E:  Ad=3D83(I) Atr=3D01(Isoc) MxPS=3D  49 Ivl=3D1ms
E:  Ad=3D03(O) Atr=3D01(Isoc) MxPS=3D  49 Ivl=3D1ms

This is all with isoc=3D1, as otherwise my syslog fills quicker than i am able to free space on my drive :-)

Thanks,

Stefan
-- =

Stefan Seyfried \ "I didn't want to write for pay. I
QA / R&D Team Mobile Devices \ wanted to be paid for what I write."
SUSE LINUX Products GmbH, N=FCrnberg \ -- Leonard Cohen

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#3 lore raw

Hi Stefan,

Quoted 58 lines
Quoted 11 lines
Quoted 9 lines

i have an el-cheapo USB BT dongle in front of me that throws an endless stream of
kernel: hci_scodata_packet: hci1 SCO packet for unknown connection handle 0 after inserting it into the USB port, unless i do
echo 1 > /sys/module/hci_usb/parameters/isoc

I don't know about the usual practice in such cases: do those devices get blacklisted in the drivers? If yes, what information should i provide to get it into the blacklist?

what does "hciconfig -a" tells you about this dongle? The content

root@strolchi:~# hciconfig -a hci1
hci1:   Type: USB
        BD Address: 00:0C:78:31:11:0A ACL MTU: 339:4 SCO MTU: 60:9
        UP RUNNING
        RX bytes:419 acl:0 sco:0 events:19 errors:0
        TX bytes:319 acl:0 sco:0 commands:17 errors:0
        Features: 0xff 0xff 0x81 0x00 0x18 0x18 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'BlueZ strolchi (1)'
        Class: 0x100100
        Service Classes:
        Device Class: Computer, Uncategorized
        HCI Ver: 1.2 (0x2) HCI Rev: 0x222 LMP Ver: 1.2 (0x2) LMP Subver: 0x222
        Manufacturer: RTX Telecom A/S (21)
Quoted 1 line

from /proc/bus/usb/devices for this device might also be helpful.

T:  Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=e0(unk. ) Sub=01 Prot=01 MxPS= 8 #Cfgs=  1
P:  Vendor=0400 ProdID=080a Rev= 1.00
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E:  Ad=81(I) Atr=03(Int.) MxPS=  64 Ivl=1ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:  If#= 1 Alt= 0 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
Quoted 2 lines

This is all with isoc=1, as otherwise my syslog fills quicker than i am able to free space on my drive :-)

actually with isco=1 the SCO transfers are still on, but limited to 8-bit instead of 16-bit with isoc=2. So if you have isoc=2 it fills up your syslog. Can you extract some of these SCO packets with hcidump for me.

My problem is now that I can only fully blacklist the SCO support for this dongle. I can't force the Bluetooth core into using 8-bit only.

Any chance of a name or identification of this dongle?

Regards

Marcel

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#4 lore raw

Hi,

Quoted 1 line · Marcel Holtmann

Hi Stefan,

=

Quoted 4 lines

actually with isco=3D1 the SCO transfers are still on, but limited to 8-bit instead of 16-bit with isoc=3D2. So if you have isoc=3D2 it fills up your syslog. Can you extract some of these SCO packets with hcidump for me.

ok, it looks like this (hoping that i invoked hcidump correctly, i am still learning this bluetooth thingy :-):

root@strolchi:~# hcidump -i hci1
HCI sniffer - Bluetooth packet analyzer ver 1.29
device: hci1 snap_len: 1028 filter: 0xffffffff
Quoted 10 lines

SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0

This happens immediately after plugging the thing in, there is no pairing or any application involved that might trigger this AFAICT.

Quoted 2 lines

My problem is now that I can only fully blacklist the SCO support for this dongle. I can't force the Bluetooth core into using 8-bit only.

Maybe i should try if SCO works at all with this thing :-)
=

Quoted 1 line

Any chance of a name or identification of this dongle?

It is an Abe UB20S, http://www.abe-hk.com/english/products/ub12-22/ub12-22.=
htm
The FCC ID is NV6-CS8024.
It is sold e.g. by conrad.com in germany and pretty cheap (around 10 Euro), and it is pretty small (this is why i bought it, i can leave it plugged in when putting the notebook into the bag :-)
-- =

Stefan Seyfried \ "I didn't want to write for pay. I
QA / R&D Team Mobile Devices \ wanted to be paid for what I write."
SUSE LINUX Products GmbH, N=FCrnberg \ -- Leonard Cohen

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easi= er
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http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D1=
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#5 lore raw

Hi Stefan,

Quoted 7 lines
Quoted 4 lines

actually with isco=1 the SCO transfers are still on, but limited to 8-bit instead of 16-bit with isoc=2. So if you have isoc=2 it fills up your syslog. Can you extract some of these SCO packets with hcidump for me.

ok, it looks like this (hoping that i invoked hcidump correctly, i am still learning this bluetooth thingy :-):

the preferred way would be "hcidump -i hci1 -X -V" to have full decoding support, but for SCO this doesn't really matter.

Quoted 14 lines
root@strolchi:~# hcidump -i hci1
HCI sniffer - Bluetooth packet analyzer ver 1.29
device: hci1 snap_len: 1028 filter: 0xffffffff
Quoted 10 lines

SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0

Quoted 2 lines

This happens immediately after plugging the thing in, there is no pairing or any application involved that might trigger this AFAICT.

Another RTX based dongle with RTX chip (0400:0807) has already been blacklisted by me. I have no idea, why they can't get this right.

Quoted 7 lines
Quoted 1 line

Any chance of a name or identification of this dongle?

It is an Abe UB20S, http://www.abe-hk.com/english/products/ub12-22/ub12-22.htm
The FCC ID is NV6-CS8024.
It is sold e.g. by conrad.com in germany and pretty cheap (around 10 Euro), and it is pretty small (this is why i bought it, i can leave it plugged in when putting the notebook into the bag :-)

It would be interesting if this will work with isoc=1 and a 16-bit PCM stream. You should really try some stuff from the btsco package.

Regards

Marcel

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#6 lore raw

Hi,

On Fri, Jul 14, 2006 at 03:54:38PM +0200, Marcel Holtmann wrote:
=

Quoted 2 lines

the preferred way would be "hcidump -i hci1 -X -V" to have full decoding support, but for SCO this doesn't really matter.

Ok, i'll note this on my cheat sheet :-)

Quoted 2 lines

It would be interesting if this will work with isoc=3D1 and a 16-bit PCM stream. You should really try some stuff from the btsco package.

Audio and sco is on my todo list for next week, i'll report back after trying it.
-- =

Stefan Seyfried \ "I didn't want to write for pay. I
QA / R&D Team Mobile Devices \ wanted to be paid for what I write."
SUSE LINUX Products GmbH, N=FCrnberg \ -- Leonard Cohen

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easi= er
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D1=
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#7 lore raw
In reply to Marcel Holtmann

Hi,

Quoted 5 lines · Marcel Holtmann

Hi Stefan,
=

Quoted 2 lines
Quoted 2 lines

actually with isco=3D1 the SCO transfers are still on, but limited to 8-bit instead of 16-bit with isoc=3D2. So if you have isoc=3D2 it fil=

ls up

Quoted 1 line
Quoted 1 line
Quoted 1 line

your syslog. Can you extract some of these SCO packets with hcidump f=

or

Quoted 1 line
Quoted 1 line
Quoted 1 line

me.

=

Quoted 7 lines
Quoted 7 lines
root@strolchi:~# hcidump -i hci1
HCI sniffer - Bluetooth packet analyzer ver 1.29
device: hci1 snap_len: 1028 filter: 0xffffffff
Quoted 2 lines

SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0

This happens immediately after plugging the thing in, there is no pairi=

ng

Quoted 5 lines
Quoted 1 line

or any application involved that might trigger this AFAICT.

=

Another RTX based dongle with RTX chip (0400:0807) has already been blacklisted by me. I have no idea, why they can't get this right.

=

Quoted 2 lines

It would be interesting if this will work with isoc=3D1 and a 16-bit PCM stream. You should really try some stuff from the btsco package.

I did this and could not get it to work at all, means it did not play any s= ound
with btsco and aplay to a Belkin F8T060xHDST headset. I got some "pops" on = the
earpiece when opening the device, but it did not play back anything.

The headset worked with a Belkin F8T013 after applying the SCO MTU patch and with a Gigabyte GN-BTD02 out of the box. The SCO MTU patch did not help for the Abe dongle.

I guess this piece of silicon is just plain crap :-)

Details for your blacklisting pleasure:
cf51:~ # lsusb -s 1:19
Bus 001 Device 019: ID 0400:080a National Semiconductor Corp. cf51:~ # hciconfig -a
hci0: Type: USB

        BD Address: 00:0C:78:31:11:0A ACL MTU: 339:4 SCO MTU: 64:9
        UP RUNNING PSCAN ISCAN
        RX bytes:1108 acl:0 sco:0 events:63 errors:0
        TX bytes:348 acl:0 sco:0 commands:24 errors:0
        Features: 0xff 0xff 0x81 0x00 0x18 0x18 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'BlueZ cf51 (0)'
        Class: 0x100100
        Service Classes: Object Transfer
        Device Class: Computer, Uncategorized
        HCI Ver: 1.2 (0x2) HCI Rev: 0x222 LMP Ver: 1.2 (0x2) LMP Subver: 0x=

222
Manufacturer: RTX Telecom A/S (21)
-- =

Stefan Seyfried \ "I didn't want to write for pay. I
QA / R&D Team Mobile Devices \ wanted to be paid for what I write."
SUSE LINUX Products GmbH, N=FCrnberg \ -- Leonard Cohen

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maintainer
#8 lore raw

Hi Stefan,

Quoted 24 lines
Quoted 11 lines
Quoted 10 lines
Quoted 4 lines

actually with isco=1 the SCO transfers are still on, but limited to 8-bit instead of 16-bit with isoc=2. So if you have isoc=2 it fills up your syslog. Can you extract some of these SCO packets with hcidump for me.

root@strolchi:~# hcidump -i hci1
HCI sniffer - Bluetooth packet analyzer ver 1.29
device: hci1 snap_len: 1028 filter: 0xffffffff
Quoted 2 lines

SCO data: handle 0 dlen 0
SCO data: handle 0 dlen 0

Quoted 8 lines
Quoted 2 lines

This happens immediately after plugging the thing in, there is no pairing or any application involved that might trigger this AFAICT.

Another RTX based dongle with RTX chip (0400:0807) has already been blacklisted by me. I have no idea, why they can't get this right.

It would be interesting if this will work with isoc=1 and a 16-bit PCM stream. You should really try some stuff from the btsco package.

I did this and could not get it to work at all, means it did not play any sound with btsco and aplay to a Belkin F8T060xHDST headset. I got some "pops" on the earpiece when opening the device, but it did not play back anything.

Quoted 5 lines

The headset worked with a Belkin F8T013 after applying the SCO MTU patch and with a Gigabyte GN-BTD02 out of the box. The SCO MTU patch did not help for the Abe dongle.

I guess this piece of silicon is just plain crap :-)

it is the same as the Vivanco one, which I also have a bug report for:

lsusb: Bus 003 Device 004: ID 0400:080a National Semiconductor Corp.

And yes, they are a piece of crap when it comes to ISOC transfers. We can only mark the SCO support as broken.

Regards

Marcel

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