Re: [Bluez-devel] Problems when inserting snd_bt_sco module in the kernel

[Brad Midgley <bmidgley@xmission.com>]

Dani

You need to build the snd_hwdep kernel module. iirc, it's something like:

make -C /usr/src/linux CONFIG_SND_HWDEP=m modules modules_install

you will also need to get a csr dongle unless you're helping with the
broadcom workaround.

brad

> I have a Fedora Core 3 box with kernel 2.6.12-1.1372. I have a Logitech
> bluetooth headset and for my Linux box a USB dongle with a bluetooth
> chipset from Broadcom Corp.
> 
> The bluetooth dongle is working fine and I can see my Logitech headset
> with hcitool scan. I have compiled the btsco driver in order to use the
> headset, but the problem comes when I try to insert the snd_bt_sco in
> the kernel, by doing:
> -----------------------------------------------------------------------------------------------------------------
> #modprobe snd_bt_sco
> FATAL: Error inserting snd_bt_sco
> (/lib/modules/2.6.12-1.1372_FC3/extra/snd-bt-sco.ko): Unknown symbol in
> module, or unknown parameter (see dmesg)
> -----------------------------------------------------------------------------------------------------------------
> This is the output from dmesg:
> -----------------------------------------------------------------------------------------------------------------
> snd_bt_sco: disagrees about version of symbol snd_pcm_new
> snd_bt_sco: Unknown symbol snd_pcm_new
> snd_bt_sco: disagrees about version of symbol snd_pcm_lib_ioctl
> snd_bt_sco: Unknown symbol snd_pcm_lib_ioctl
> snd_bt_sco: disagrees about version of symbol snd_hwdep_new
> snd_bt_sco: Unknown symbol snd_hwdep_new
> snd_bt_sco: disagrees about version of symbol snd_pcm_set_ops
> snd_bt_sco: Unknown symbol snd_pcm_set_ops
> snd_bt_sco: disagrees about version of symbol snd_pcm_period_elapsed
> snd_bt_sco: Unknown symbol snd_pcm_period_elapsed
> snd_bt_sco: disagrees about version of symbol snd_pcm_new
> snd_bt_sco: Unknown symbol snd_pcm_new
> snd_bt_sco: disagrees about version of symbol snd_pcm_lib_ioctl
> snd_bt_sco: Unknown symbol snd_pcm_lib_ioctl
> snd_bt_sco: disagrees about version of symbol snd_hwdep_new
> snd_bt_sco: Un known symbol snd_hwdep_new
> snd_bt_sco: disagrees about version of symbol snd_pcm_set_ops
> snd_bt_sco: Unknown symbol snd_pcm_set_ops
> snd_bt_sco: disagrees about version of symbol snd_pcm_period_elapsed
> snd_bt_sco: Unknown symbol snd_pcm_period_elapsed
> -----------------------------------------------------------------------------------------------------------------
> More output information that can be useful:
> -----------------------------------------------------------------------------------------------------------------
> #hciconfig -a
> hci0:   Type: USB
>         BD Address: 00:80:5A:40:9E:72 ACL MTU: 377:10  SCO MTU: 16:0
>         UP RUNNING PSCAN ISCAN
>         RX bytes:1114 acl:6 sco:0 events:48 errors:0
>         TX bytes:485 acl:6 sco:0 commands:23 errors:0
>         Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
>         Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
>         Link policy: RSWITCH HOLD SNIFF PARK
>         Link mode: SLAVE ACCEPT
>         Name: 'dani-laptop-0'
>         Class: 0x000000
>         Service Classes: Unspecified
>         Device Class: Miscellaneous,
>         HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver: 0x309
>         Manufacturer: Broadcom Corporation (15)
> -------------------------------------------------------------------------------------------------------------
> #hciconfig hci0 revision
> hci0:    Type: USB
>         BD Address: 00:80:5A:40:9E:72 ACL MTU: 377:10  SCO MTU: 16:0
>         Firmware 0.3.009
> -------------------------------------------------------------------------------------------------------------
> #hcitool info 00:0D:44:0C:11:4A (headset's address)
> Requesting information ...
>         BD Address:  00:0D:44:0C:11:4A
>         Device Name: Logitech HS01-V16
>         LMP Version: 1.2 (0x2) LMP Subversion: 0x611
>         Manufacturer: Cambridge Silicon Radio (10)
>         Features: 0xfc 0xfe 0x0f 0x00 0x08 0x08 0x00 0x00
>                 <encryption> <slot offset> <timing accuracy> < ;role switch>
>                 <hold mode> <sniff mode> <RSSI> <channel quality> <SCO link>
>                 <HV2 packets> <HV3 packets> <u-law log> <A-law log> <CVSD>
>                 <paging scheme> <power control> <transparent SCO>
>                 <AFH cap. slave> <AFH cap. master>
> -------------------------------------------------------------------------------------------------------------------
> # btsco -v
> btsco v0.4c
> Error: control open (hw:2): No such file or directory
> Error: Can't find device. Bail
> ---------------------------------------------------------------------------------------------------------------------
> 
> Any idea about what is wrong ? Maybe my USB dongle does not work with
> the btsco driver ?
> 
> Thanks in advance
> 
> Dani Camps
> 
> 
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