Re: [Bluez-devel] btsco - a few comments and a small .py script

[Andreas Beck <becka@uni-duesseldorf.de>]

Hi Brad,
> >   I'd suggest to put a simple exaple there, how the results from
> >   "hciconfig hci0 revision" should look like. I.e. that the line 
> >   "SCO mapping:  HCI" should exist.
> I cleaned this up a bit.

Great. That should be clear now.

> I don't know of such a command. /etc/bluetooth/link_key is how the keys 
> are stored in the older daemon so I've mentioned both in the docs.

Yeah - this might as well help.

 
> >3. I have written a small Python-Script and a .btscorc
> Perfect. I gave a talk about btsco at our usergroup meeting and this 
> very question came up! (slides at http://flamebot.com/blog)
> I will link to you or put these in a contrib dir (what do you think?)

I don't care. I don't think this will need updates, unless the skype
d-bus protocol gets changed in a fundamental way. So you might as well 
put it in a contrib dir. That makes it more obvious and readily
available.

License is PD as far as my part is concerned. It is derived from 
http://download.skype.com/share/devzone/example_linux.zip
which does not have any copyright or license notes.

However as it is a sample file from their API docs, I suppose this is
not a problem.

> >4. I also have the "microphone transmits noise" problem sometimes
> >   (rarely). Could it be, that there is a missed byte that swaps high
> >   and lowbyte? It sounded a bit like this to me.
> I think you are right. There is some kind of fundamental transport glitch.

If it gets annoying, I'll have a look at the btsco daemon and see if I
can introduce a signal that will purposefully skip a single byte thus 
regaining sync (if my assumption is correct - I got to look at the
code first or get a clue about the transmission format) if I have a 
noisy line.

> >5. My cheap (EUR 22.- incl. VAT) LevelOne BLH-1000 Headset works fine,
> >   except for the glitch just described. It ignores microphone level
> >   setup, though. Loopback control works. Using the buttons, you can
> >   only reach Speaker Level 12 (80%) - using the mixer you can go to
> >   100%.
> I added it to the list.

A nice addition for me would be a software mic-boost. The quality of the
sound is not bad, but (probably due to the ridiculously compact design
of my headset) the dynamic range is not used appropriately.

I'll have a look, if I can add something like a "--micboost" switch that
will just scale up the input before giving it to the sound device.


Another thing I noticed (which is probably not btsco related, but more
of a general bluez problem, maybe even a general kernel problem) is,
that I now had two occasions where my USB subsystem became unresponsive 
to a point where the machine froze.

I could still ping it, but mouse was unresponsive, and higher level
network protocols had also stopped working.

The syslogs say:

Aug 19 00:34:58 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 00:35:09 cupido kernel: uhci_hcd 0000:00:04.2: host system error, PCI problems?
Aug 19 00:35:09 cupido kernel: uhci_hcd 0000:00:04.2: host controller halted, very bad!
Aug 19 00:36:17 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 00:36:17 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 00:36:17 cupido kernel: snd-bt-sco: capture_trigger 0
Aug 19 00:36:17 cupido kernel: snd-bt-sco: setting capture to NULL
Aug 19 00:36:17 cupido kernel: snd-bt-sco: Disposing of previous socket count 2
Aug 19 00:36:59 cupido kernel: snd-bt-sco: playback_open
Aug 19 00:36:59 cupido kernel: snd-bt-sco: capture_open
Aug 19 00:36:59 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 672 count: 42
Aug 19 00:36:59 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 00:36:59 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 00:37:19 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 00:37:19 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 00:38:01 cupido /USR/SBIN/CRON[8130]: (mail) CMD (  if [ -x /usr/lib/exim/exim3 -a -f /etc/exim/exim.conf ]; then /usr/lib/exim/exim3 -q ; fi)
Aug 19 00:38:17 cupido kernel: hci_cmd_task: hci0 command tx timeout
Aug 19 00:39:12 cupido kernel: usb 1-2: USB disconnect, address 2
Aug 19 00:39:12 cupido kernel: usb 1-2.3: USB disconnect, address 8
Aug 19 00:39:12 cupido kernel: usb 1-2.6: USB disconnect, address 13
Aug 19 00:39:41 cupido kernel: __tx_submit: hci0 tx submit failed urb f53cabf4 type 1 err -19
Aug 19 00:39:41 cupido kernel: __tx_submit: hci0 tx submit failed urb f53cabf4 type 1 err -19
[about 10 more similar messages]
[at this point the system was still responsive to mouse/keyboard (PS/2
based) - I think I tried to reset the USB hub (Noname, called USB1007,
Vendor 05e3, Product 0604, Revision 0.05) by pulling it's inbound plug,
as it's link LEDs looked wrong (all off)]
Aug 19 00:39:41 cupido hcid[7720]: HCI dev 0 down
Aug 19 00:39:41 cupido hcid[7720]: Stoping security manager 0
Aug 19 00:39:42 cupido hcid[7720]: HCI dev 0 unregistered
Aug 19 00:39:43 cupido kernel: usb 1-2: new full speed USB device using uhci_hcd and address 14
Aug 19 00:39:43 cupido kernel: hub 1-2:1.0: USB hub found
Aug 19 00:39:43 cupido kernel: hub 1-2:1.0: 7 ports detected
Aug 19 00:39:43 cupido kernel: usb 1-2.3: new full speed USB device using uhci_hcd and address 15
Aug 19 00:39:43 cupido kernel: drivers/usb/media/ov511.c: USB OV518 video device found
Aug 19 00:39:43 cupido kernel: drivers/usb/media/ov511.c: Device revision 1
Aug 19 00:39:43 cupido kernel: drivers/usb/media/ov511.c: Compression required with OV518...enabling
Aug 19 00:39:44 cupido usb.agent[8289]:      ov511: already loaded
Aug 19 00:39:45 cupido usb.agent[8322]:      usbcore: already loaded
Aug 19 00:39:45 cupido kernel: drivers/usb/media/ov511.c: Sensor is an OV6630AF
Aug 19 00:39:46 cupido kernel: drivers/usb/media/ov511.c: Device at usb-0000:00:04.2-2.3 registered to minor 0
Aug 19 00:39:46 cupido kernel: usb 1-2.6: new full speed USB device using uhci_hcd and address 16
Aug 19 00:39:46 cupido kernel: Unable to load interpreter /lib/ld-linux.so.2
Aug 19 00:39:46 cupido kernel: Unable to handle kernel paging request at virtual address 000a7d02
Aug 19 00:39:46 cupido kernel:  printing eip:
Aug 19 00:39:46 cupido kernel: f88821e9
Aug 19 00:39:46 cupido kernel: *pde = 00000000
Aug 19 00:39:46 cupido kernel: Oops: 0000 [#1]
Aug 19 00:39:46 cupido kernel: PREEMPT 
Aug 19 00:39:46 cupido kernel: Modules linked in: hci_usb sco tun rfcomm l2cap actisys_sir irtty_sir sir_dev irda crc_ccitt sg via_agp nls_iso8859_1 nls_cp437 vfat eth1394 w83781d i2c_sensor i2c_viapro i2c_core usb_storage msr microcode cpuid smbfs msdos fat video1394 raw1394 ohci1394 ieee1394 mga drm agpgart parport_pc lp parport snd_bt_sco snd_hwdep usbmouse ide_cd via82cxxx ide_core 8250_pci 8250 serial_core snd_ens1371 snd_rawmidi snd_ac97_codec snd_pcm_oss ov511 videodev snd_mixer_oss bluetooth snd_pcm snd_timer snd snd_page_alloc uhci_hcd usbcore evdev
Aug 19 00:39:46 cupido kernel: CPU:    0
Aug 19 00:39:46 cupido kernel: EIP:    0060:[pg0+944181737/1069470720]    Not tainted VLI
Aug 19 00:39:46 cupido kernel: EFLAGS: 00010246   (2.6.12.5) 
Aug 19 00:39:46 cupido kernel: EIP is at usb_disable_interface+0x49/0x80 [usbcore]
Aug 19 00:39:46 cupido kernel: eax: 00000000   ebx: eec94848   ecx: 00000282   edx: 000a7d00
Aug 19 00:39:46 cupido kernel: esi: 00000001   edi: eb595000   ebp: eec94880   esp: f70abd74
Aug 19 00:39:46 cupido kernel: ds: 007b   es: 007b   ss: 0068
Aug 19 00:39:46 cupido kernel: Process khubd (pid: 1138, threadinfo=f70aa000 task=f70425e0)
Aug 19 00:39:46 cupido kernel: Stack: 0000000b 0000000b 00000000 eb595000 00000001 f8882533 eb595000 ea4c00a0 
Aug 19 00:39:46 cupido kernel:        0000000b 00000001 00000002 00000001 00000000 00000000 00001388 ea4c00a0 
Aug 19 00:39:46 cupido kernel:        f88a5ec0 ea4c0ba0 00000002 eb595000 f88a4c09 eb595000 00000001 00000002 
Aug 19 00:39:46 cupido kernel: Call Trace:
Aug 19 00:39:46 cupido usb.agent[8388]:      hci_usb: already loaded
Aug 19 00:39:47 cupido kernel:  [pg0+944182579/1069470720] usb_set_interface+0xe3/0x190 [usbcore]
Aug 19 00:39:47 cupido kernel:  [pg0+944323593/1069470720] hci_usb_probe+0x4a9/0x5e0 [hci_usb]
Aug 19 00:39:47 cupido kernel:  [new_inode+36/176] new_inode+0x24/0xb0
Aug 19 00:39:47 cupido kernel:  [sysfs_new_dirent+41/128] sysfs_new_dirent+0x29/0x80
Aug 19 00:39:47 cupido kernel:  [pg0+944148612/1069470720] usb_probe_interface+0x64/0x80 [usbcore]
Aug 19 00:39:47 cupido kernel:  [driver_probe_device+47/128] driver_probe_device+0x2f/0x80
Aug 19 00:39:47 cupido kernel:  [device_attach+123/208] device_attach+0x7b/0xd0
Aug 19 00:39:47 cupido kernel:  [kobject_get+23/32] kobject_get+0x17/0x20
Aug 19 00:39:47 cupido kernel:  [bus_add_device+95/208] bus_add_device+0x5f/0xd0
Aug 19 00:39:47 cupido kernel:  [device_pm_add+85/144] device_pm_add+0x55/0x90
Aug 19 00:39:47 cupido kernel:  [device_add+232/384] device_add+0xe8/0x180
Aug 19 00:39:47 cupido kernel:  [pg0+944183698/1069470720] usb_set_configuration+0x262/0x560 [usbcore]
Aug 19 00:39:47 cupido kernel:  [pg0+944159474/1069470720] usb_new_device+0x142/0x1e0 [usbcore]
Aug 19 00:39:47 cupido kernel:  [pg0+944163887/1069470720] hub_port_connect_change+0x36f/0x430 [usbcore]
Aug 19 00:39:47 cupido kernel:  [pg0+944164761/1069470720] hub_events+0x2a9/0x440 [usbcore]
Aug 19 00:39:47 cupido kernel:  [pg0+944165247/1069470720] hub_thread+0x4f/0x110 [usbcore]
Aug 19 00:39:47 cupido kernel:  [autoremove_wake_function+0/96] autoremove_wake_function+0x0/0x60
Aug 19 00:39:47 cupido kernel:  [pg0+944165168/1069470720] hub_thread+0x0/0x110 [usbcore]
Aug 19 00:39:47 cupido kernel:  [kernel_thread_helper+5/12] kernel_thread_helper+0x5/0xc
Aug 19 00:39:47 cupido kernel: Code: 75 10 8b 5c 24 08 8b 74 24 0c 8b 7c 24 10 83 c4 14 c3 31 f6 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 8b 53 0c 89 f0 46 c1 e0 05 <0f> b6 44 10 02 89 3c 24 89 44 24 04 e8 36 ff ff ff 0f b6 43 04 
Aug 19 00:40:41 cupido sdpd[7722]: terminating...   
Aug 19 00:40:42 cupido hcid[8451]: Bluetooth HCI daemon
Aug 19 00:40:42 cupido sdpd[8453]: Bluetooth SDP daemon 
Aug 19 00:41:32 cupido kernel:  <6>usbcore: deregistering driver hci_usb
Aug 19 00:43:08 cupido kernel: usbcore: deregistering driver ov511
Aug 19 00:43:52 cupido modprobe: FATAL: Error running install command for sound_slot_2 
Aug 19 00:43:52 cupido modprobe: FATAL: Error running install command for sound_slot_2 
Aug 19 00:48:02 cupido kernel: mtrr: no MTRR for e2000000,1000000 found
Aug 19 00:48:02 cupido gdm[4128]: gdm_slave_xioerror_handler: Fatal X error - Restarting :0
Aug 19 00:48:05 cupido kernel: mtrr: no MTRR for e2000000,1000000 found
Aug 19 00:48:06 cupido kernel: atkbd.c: Spurious ACK on isa0060/serio0. Some program, like XFree86, might be trying access hardware directly.
Aug 19 00:48:06 cupido kernel: atkbd.c: Spurious ACK on isa0060/serio0. Some program, like XFree86, might be trying access hardware directly.
Aug 19 00:48:23 cupido gconfd (becka-www-5389): GConf server is not in use, shutting down.
Aug 19 00:48:23 cupido gconfd (becka-www-5389): Exiting
Aug 19 00:48:23 cupido shutdown[8537]: shutting down for system reboot
Aug 19 00:48:24 cupido init: Switching to runlevel: 6
Aug 19 00:48:27 cupido irattach: got SIGTERM or SIGINT 
Aug 19 00:48:27 cupido irattach: exiting ... 
Aug 19 00:48:27 cupido kernel: sirdev_put_instance
Aug 19 00:48:27 cupido kernel: irtty_close - ttyS1: irda line discipline closed
Aug 19 00:48:28 cupido ovpn-client[5651]: event_wait : Interrupted system call (code=4)
Aug 19 00:48:28 cupido ovpn-client[5651]: TCP/UDP: Closing socket
Aug 19 00:48:28 cupido ovpn-client[5651]: /sbin/route del -net 192.168.111.0 netmask 255.255.255.0
Aug 19 00:48:28 cupido ovpn-client[5651]: ERROR: Linux route delete command failed: shell command exited with error status: 7
Aug 19 00:48:28 cupido ovpn-client[5651]: /sbin/route del -net 192.168.112.0 netmask 255.255.255.0
Aug 19 00:48:28 cupido ovpn-client[5651]: ERROR: Linux route delete command failed: shell command exited with error status: 7
Aug 19 00:48:28 cupido ovpn-client[5651]: Closing TUN/TAP interface
Aug 19 00:48:29 cupido ovpn-client[5651]: SIGTERM[hard,] received, process exiting
Aug 19 00:48:29 cupido xfs[3884]: terminating 
Aug 19 00:48:30 cupido ntpd[4026]: ntpd exiting on signal 15
Aug 19 01:08:33 cupido syslogd 1.4.1#17: restart.


On another occasion, it went down more drastically:
Aug 19 21:51:08 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:51:08 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 cou
Aug 19 21:51:08 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:51:08 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:59:52 cupido syslogd 1.4.1#17: restart.

However before that happened, I see a few occurences of

hci_scodata_packet: hci0 SCO packet for unknown connection handle [varies]

and a bit later:

snd-bt-sco: Disposing of previous socket count 3
snd-bt-sco: file_count is 1 (expected 3)

shortly before it went down, I got:


Aug 19 21:50:33 cupido kernel: hub 1-2:1.0: port 6 disabled by hub (EMI?), re-enabling...
Aug 19 21:50:33 cupido kernel: usb 1-2.6: USB disconnect, address 10
Aug 19 21:50:33 cupido kernel: __tx_submit: hci0 tx submit failed urb f46d5214 type 3 err -19
Aug 19 21:50:33 cupido kernel: __tx_submit: hci0 tx submit failed urb f46d5214 type 3 err -19
Aug 19 21:50:33 cupido hcid[4121]: HCI dev 0 down
Aug 19 21:50:33 cupido hcid[4121]: Stoping security manager 0
Aug 19 21:50:33 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:33 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:50:33 cupido hcid[4121]: HCI dev 0 unregistered
Aug 19 21:50:34 cupido kernel: usb 1-2.6: new full speed USB device using uhci_hcd and address 11
Aug 19 21:50:34 cupido kernel: usb 1-2.6: device descriptor read/64, error -71
Aug 19 21:50:34 cupido kernel: usb 1-2.6: device descriptor read/64, error -71
Aug 19 21:50:34 cupido kernel: usb 1-2.6: new full speed USB device using uhci_hcd and address 12
Aug 19 21:50:34 cupido kernel: usb 1-2.6: device descriptor read/64, error -71
Aug 19 21:50:34 cupido kernel: usb 1-2.6: device descriptor read/64, error -71
Aug 19 21:50:34 cupido kernel: usb 1-2.6: new full speed USB device using uhci_hcd and address 13
Aug 19 21:50:35 cupido kernel: usb 1-2.6: device not accepting address 13, error -71
Aug 19 21:50:35 cupido kernel: usb 1-2.6: new full speed USB device using uhci_hcd and address 14
Aug 19 21:50:35 cupido kernel: usb 1-2.6: device not accepting address 14, error -71
Aug 19 21:50:37 cupido kernel: usb 1-2.6: new full speed USB device using uhci_hcd and address 15
Aug 19 21:50:38 cupido hcid[4121]: HCI dev 0 registered
Aug 19 21:50:38 cupido usb.agent[26062]:      hci_usb: already loaded
Aug 19 21:50:38 cupido hcid[4121]: HCI dev 0 up
Aug 19 21:50:38 cupido usb.agent[26105]:      hci_usb: already loaded
Aug 19 21:50:38 cupido hcid[4121]: Starting security manager 0
Aug 19 21:50:38 cupido usb.agent[26122]:      hci_usb: already loaded
Aug 19 21:50:41 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:50:41 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:50:41 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:50:41 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:50:41 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:41 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:50:45 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:50:45 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:50:45 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:50:45 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:50:45 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:45 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:50:46 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:50:46 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:50:46 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:50:46 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:50:46 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:46 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:50:49 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:50:49 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:50:49 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:50:49 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:50:49 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:49 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:50:51 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:50:51 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:50:51 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:50:51 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:50:51 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:51 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:50:56 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:50:56 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:50:56 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:50:56 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:50:56 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:56 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:50:57 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:50:57 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:50:58 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:50:58 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:50:58 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:50:58 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:51:02 cupido hcid[4121]: link_key_request (sba=00:09:DD:10:4E:8C, dba=00:0A:94:93:74:B7)
Aug 19 21:51:08 cupido kernel: snd-bt-sco: playback_trigger 0
Aug 19 21:51:08 cupido kernel: snd-bt-sco: setting playback to NULL
Aug 19 21:51:08 cupido kernel: snd-bt-sco: playback_open
Aug 19 21:51:08 cupido kernel: snd-bt-sco: prepare ok bps: 16000 size: 8000 count: 800
Aug 19 21:51:08 cupido kernel: snd-bt-sco: playback_trigger 1
Aug 19 21:51:08 cupido kernel: snd-bt-sco: setting playback to bspcm
Aug 19 21:59:52 cupido syslogd 1.4.1#17: restart.


I'm not sure, what that means. It seems to be related to the USB Hub,
which also usually shows erratic LED Link display when that happens.
However I haven't seen this before using the BT dongle, and I was using
it for a webcam before, so it shouldn't be related just to the larger
amounts of traffic.

I have also noticed my system hanging on shutdown when trying to unload
the rfcomm stuff. This is usually cured by resetting the USB hub.
This looks like this:


Aug 21 04:12:14 cupido xfs[3928]: terminating 
Aug 21 04:12:15 cupido ntpd[4072]: ntpd exiting on signal 15
Aug 21 04:13:24 cupido kernel: usb 1-2: USB disconnect, address 2
Aug 21 04:13:24 cupido kernel: usb 1-2.3: USB disconnect, address 3
Aug 21 04:13:24 cupido kernel: usb 1-2.6: USB disconnect, address 4
Aug 21 04:13:26 cupido kernel:  1-2.6: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 64 rq 0 len 0 ret -110
Aug 21 04:13:26 cupido sdpd[4103]: terminating...   
Aug 21 04:13:26 cupido rpc.statd[4057]: Caught signal 15, un-registering and exiting.


CU, ANdy


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