RE: cx88 driver sound problems

["Marko Punnar" <markpu@xxxxxx>]

Hi!

:> -----Original Message-----
:> From: video4linux-list-bounces@xxxxxxxxxx 
:> [mailto:video4linux-list-bounces@xxxxxxxxxx] On Behalf Of 
:> Sami Kiiskila
:> Sent: Wednesday, June 01, 2005 11:08 AM
:> To: Linux and Kernel Video
:> Subject: cx88 driver sound problems
:> 
:> 
:> Hello
:> 
:> Does anyone else have sound problems with Hauppauge Wintv GO 
:> or some other
:> cx88 based card? Tv system is PAL-BG with NICAM and mono FM 
:> sound (A2).
:> 
:> Video and tuner work OK. Sound is connected via external 
:> cable from tv card to line in of sound card. I have tried 
:> several versions of the drivers.
:> 
:> - In A2 mode the sound works most of the time, but a burst 
:> of noise appears maybe
:>   once in ten seconds and lasts about a second. Then the 
:> sound comes back.
:> 
:> - In NICAM mode the sound is normally good, but maybe once 
:> in 5 times the driver
:>   is started the sound is severly distorted and stays this 
:> way. By selecting
:>   PAL-BG as tv norm in xawtv or with v4lctl couple of times 
:> fixes the distortion.
:> 
:> Normally this is not a problem but when starting recording 
:> by cron or from a remote machine it is very annoying of not 
:> knowing wether the sound will be recorded properly or not.
:> 
:> The same card works fine with DScaler with no sound 
:> problems. Which is strange since
:> cx88 driver's audio code is partly based on DScaler.
:> 
:> I have tried to find critical differences between those two 
:> with no success, also tried stopping interrupts and stopping 
:> dma transfers during calls to "cx88_set_tvaudio"
:> with no effect. Does anyone has any ideas what else might be 
:> causing these intermittent failure to initialize the sound 
:> decoder properly?
:> 
:> I would like to know how common this problem is, and is it 
:> only with certain compination of things ( only in PAL, only 
:> in PAL-BG, only with some cx88 cards ??? )
:> 
:> --

I have same problem PAL-BG and Nicam.

kernel 2.6.11
=8<======8<=======
Linux video capture interface: v1.00
cx2388x v4l2 driver version 0.0.4 loaded
cx2388x: snapshot date 2005-01-24
ACPI: PCI interrupt 0000:00:08.0[A] -> GSI 19 (level, low) -> IRQ 225
cx88[0]: subsystem: 0070:3401, board: Hauppauge WinTV 34xxx models
[card=1,autodetected]
tveeprom: Hauppauge: model = 34514, rev = H121, serial# = 7218214
tveeprom: tuner = Philips FM1216 (idx = 21, type = 5)
tveeprom: tuner fmt = PAL(B/G) (eeprom = 0x04, v4l2 = 0x00000007)
tveeprom: audio_processor = MSP3425 (type = 15)
cx88[0]: registered IR remote control
cx88[0]/0: found at 0000:00:08.0, rev: 5, irq: 225, latency: 32, mmio:
0xe9000000
tuner: chip found at addr 0xc2 i2c-bus cx88[0]
tuner: type set to 5 (Philips PAL_BG (FI1216 and compatibles)) by cx88[0]
cx88[0]/0: registered device video0 [v4l2]
cx88[0]/0: registered device vbi0
cx88[0]/0: registered device radio0
cx88[0]/0: set_audio_standard_BTSC (status: known-good)
cx88[0]/0: cx88: tvaudio thread started
cx2388x alsa driver version 0.0.4 loaded
cx2388x: snapshot date 2005-01-24
ACPI: PCI interrupt 0000:00:08.1[A] -> GSI 19 (level, low) -> IRQ 225
cx88[0]/1: found at 0000:00:08.1, rev: 5, irq: 225, latency: 32, mmio:
0xea000000
cx88[0]/1: no alsa support yet, this is just a dummy module
=8<======8<=======
With later snapshots I have no sound at all

===========================
Marko

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