Re: [pwc] Frame buffer underflow

[Krzysztof Kowalczyk <>]

On Tue, Jul 05, 2005 at 01:12:18PM +0200, Luc Saillard wrote:
> On Mon, Jul 04, 2005 at 02:01:34PM +0200, Krzysztof Kowalczyk wrote:
> > Hi,
> > I've tried philips pcvc680k with kernel 2.6.12.2 
> > and also with 2.6.12.2 with module compiled from pwc-10.0.7a.tar.bz2
> > and I've got lots of messages:
> >  kernel: pwc Frame buffer underflow (XXXX bytes); discarded.
> > with XXXX depending on resolution.
> >
> 
> Can you try another application like xawtv ?
I've checked with xawtv and got same problems, black image and lots of
buffer underflow messages. But additionally I have some output from
xawtv:

This is xawtv-3.94, running on Linux/i686 (2.6.12.2n)
/dev/video0 [v4l2]: no overlay support
v4l-conf had some trouble, trying to continue anyway
ioctl: VIDIOC_G_STD(std=0xb7f2643cbfc2ed20
[PAL_D,PAL_M,PAL_Nc,PAL_60,NTSC_M_JP,?,?,SECAM_D,SECAM_L,?ATSC_8_VSB,ATSC_16_VSB,(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)]):
Invalid argument
ioctl: VIDIOC_G_CTRL(id=9963778;value=134558539): Invalid argument
ioctl: VIDIOC_S_CTRL(id=9963778;value=134558539): Invalid argument
ioctl: VIDIOC_S_CTRL(id=9963776;value=64): Invalid argument
ioctl: VIDIOC_S_CTRL(id=9963777;value=32): Invalid argument
ioctl: VIDIOC_S_STD(std=0x0 []): Invalid argument
v4l2: oops: select timeout

> Do you have other usb device on the same bus ? perhaps it's the problem.
I don't have any other usb devices connected right now.

-- 
Krzysztof Kowalczyk 
                                http://www.xysio.prv.pl/

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