[pvrusb2] Sound Problems

[Martin Carpella]

Hello,

first, thanks to the author for his very impressive work on this driver!
It (almost) all worked like a charm.

Unfortunately, I have some problems regarding sound/audio:
I am currently in the stage of working with "cat /dev/video0 > tmp.mpg",
as I have not yet set up a working TV application. Video works fine, but
sound almost always is only a crackling noise, nothing similar to the
audio on the channel. Once or twice it worked, but stopped immedeatly
after stoping the current dump and starting a second one.

I confess, I'm not really sure what to do about it. I also
double-checked that the device is not muted ;) I copied the mpg to
antoher PC to verify it is no problem with the sound card. And as I
said, once or twice it already worked.

The relevant parts of the dmesg output is pasted below. The device is a
24xxx model. I also tried the various PAL modes, just to be sure. Once
it seemded to work when changing the frequency during dumping from
/dev/video0, but it was not reproducible.

Any help would be appreciated, thanks in advance!

Best regards,
Martin

Linux video capture interface: v1.00
usbcore: registered new driver pvrusb2
/tmp/martin/pvrusb2-mci-20060702/driver/pvrusb2-main.c: Hauppauge
WinTV-PVR-USB2 MPEG2 Encoder/Tuner : 20060702 (from www.isely.net)
/tmp/martin/pvrusb2-mci-20060702/driver/pvrusb2-main.c: Debug mask is 15
(0xf)
usb 1-3: reset high speed USB device using ehci_hcd and address 3
cx25840 0-0044: cx25843-23 found @ 0x88 (pvrusb2_a)
cx25840 0-0044: loaded v4l-cx25840.fw firmware (13837 bytes)
tuner 0-0061: chip found @ 0xc2 (pvrusb2_a)
tda9887 0-0043: chip found @ 0x86 (pvrusb2_a)
tveeprom 0-00a2: Hauppauge model 24019, rev C289, serial# 8563280
tveeprom 0-00a2: tuner model is TCL MFPE05 2 (idx 89, type 38)
tveeprom 0-00a2: TV standards PAL(B/G) PAL(I) SECAM(L/L') PAL(D/D1/K)
(eeprom 0x74)
tveeprom 0-00a2: audio processor is CX25843 (idx 37)
tveeprom 0-00a2: decoder processor is CX25843 (idx 30)
tveeprom 0-00a2: has radio, has IR remote
tuner 0-0061: type set to 38 (Philips PAL/SECAM multi (FM1216ME MK3))
cx25840 0-0044: Video signal:              not present
cx25840 0-0044: Detected format:           PAL-BDGHI
cx25840 0-0044: Detected audio mode:       forced mode
cx25840 0-0044: Detected audio standard:   no detected audio standard
cx25840 0-0044: Audio muted:               yes
cx25840 0-0044: Audio microcontroller:     running
cx25840 0-0044: Configured audio standard: automatic detection
cx25840 0-0044: Configured audio system:   automatic standard and mode
detection
cx25840 0-0044: Specified standard:        PAL-BDGHI
cx25840 0-0044: Specified video input:     Composite 7
cx25840 0-0044: Specified audio input:     Tuner (In8)
cx25840 0-0044: Specified audioclock freq: 48000 Hz
cx25840 0-0044: Preferred audio mode:      stereo
cx25840 0-0044: Selected 65 MHz format:    autodetect
cx25840 0-0044: Selected 45 MHz format:    chroma
tuner 0-0061: Tuner mode:      analog TV
tuner 0-0061: Frequency:       175.25 MHz
tuner 0-0061: Standard:        0x00000005
tda9887 0-0043: Data bytes: b=0x14 c=0x74 e=0x49
pvrusb2: Device initialization completed successfully.
pvrusb2: registered device video0 [mpeg]


[...]

# cat /sys/class/pvrusb2/sn-8563280/debuginfo
big lock free; ctl lock free
driver flags: initialized ok connected
Subsystems enabled / configured: +ENC_FIRMWARE
Subsystems disabled / unconfigured: -ENC_CFG -DIG_RUN -USB_RUN -ENC_RUN
Attached I2C modules:
cx25840 @ 0x44 (handler: pvrusb2-cx2584x-v4l) [v4l2_standard v4l2_bcsh
v4l2_volume v4l2_freq v4l2_size v4l2_log]
Philips PAL/SECAM multi (FM1216ME MK3) @ 0x61 (handler: pvrusb2-tuner)
[v4l2_standard v4l2_bcsh v4l2_volume v4l2_freq v4l2_size v4l2_log]
tda9887 @ 0x43 (handler: pvrusb2-demod) [v4l2_standard v4l2_bcsh
v4l2_volume v4l2_freq v4l2_size v4l2_log]

Jul 28 13:51:02 [kernel] pvrusb2: =================  START STATUS CARD
#0  =================
Jul 28 13:51:02 [kernel] cx25840 0-0044: Video signal:              present
Jul 28 13:51:02 [kernel] cx25840 0-0044: Detected format:
PAL-BDGHI
Jul 28 13:51:02 [kernel] cx25840 0-0044: Detected audio mode:       stereo
Jul 28 13:51:02 [kernel] cx25840 0-0044: Detected audio standard:   A2-BG
Jul 28 13:51:02 [kernel] cx25840 0-0044: Audio muted:               no
Jul 28 13:51:02 [kernel] cx25840 0-0044: Audio microcontroller:     running
Jul 28 13:51:02 [kernel] cx25840 0-0044: Configured audio standard:
automatic detection
Jul 28 13:51:02 [kernel] cx25840 0-0044: Configured audio system:
automatic standard and mode detection
Jul 28 13:51:02 [kernel] cx25840 0-0044: Specified standard:
PAL-BDGHI
Jul 28 13:51:02 [kernel] cx25840 0-0044: Specified video input:
Composite 7
Jul 28 13:51:02 [kernel] cx25840 0-0044: Specified audio input:
Tuner (In8)
Jul 28 13:51:02 [kernel] cx25840 0-0044: Specified audioclock freq: 48000 Hz
Jul 28 13:51:02 [kernel] cx25840 0-0044: Preferred audio mode:      stereo
Jul 28 13:51:02 [kernel] cx25840 0-0044: Selected 65 MHz format:
autodetect
Jul 28 13:51:02 [kernel] cx25840 0-0044: Selected 45 MHz format:    chroma
Jul 28 13:51:02 [kernel] tuner 0-0061: Tuner mode:      analog TV
Jul 28 13:51:02 [kernel] tuner 0-0061: Frequency:       175.25 MHz
Jul 28 13:51:02 [kernel] tuner 0-0061: Standard:        0x00000005
Jul 28 13:51:02 [kernel] tda9887 0-0043: Data bytes: b=0x14 c=0x74 e=0x49
Jul 28 13:51:02 [kernel] pvrusb2: ==================  END STATUS CARD
#0  ==================