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[pwc] pwc pwc_isoc_handler() called with status -84

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Subject: [pwc] pwc pwc_isoc_handler() called with status -84
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Date: Sun, 14 Aug 2005 20:30:44 +0200
Hallo,

I am using the Philips PCVC 740 with Suse kernel-of-the-day 2.6.13-rc6 and PWC driver 10.0.7a. I get a lot of of below messages messing up my syslog. I get this messages using Camstream and Motion. The number of messages per second is CPU load dependent. If a run motion alone I get one message per second on the average. If I run motion and compile the kernel at the same time I get about seven of these messages per second. Also I realise that the messages become more frequent if the harddisk becomes active or the framerate in camstream is increased.

However the Camstream and Motion outputs look fine.

Do other people have the same experience?

Is this a PWC driver problem or general USB kernel problem with isochronous pipes?

Kirus

/...
Aug 14 20:00:13 mobile kernel: pwc pwc_isoc_handler() called with status -84 [CRC/Timeout (could be anything)]. Aug 14 20:00:13 mobile kernel: pwc Frame buffer underflow (17822 bytes); discarded. Aug 14 20:00:13 mobile kernel: pwc pwc_isoc_handler() called with status -84 [CRC/Timeout (could be anything)]. Aug 14 20:00:13 mobile kernel: pwc Frame buffer underflow (17822 bytes); discarded. Aug 14 20:01:05 mobile kernel: pwc pwc_isoc_handler() called with status -84 [CRC/Timeout (could be anything)].
/...

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