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From: Frank Schaefer <fschaefer.oss@googlemail.com>
To: linux-media@vger.kernel.org
Subject: gspca-sonixj: ioctl VIDIOC_DQBUF blocks for 3s and retuns EIO
Date: Thu, 13 May 2010 17:58:49 +0200	[thread overview]
Message-ID: <4BEC21B9.4010605@googlemail.com> (raw)

Hi,

I'm not sure if I'm hitting a bug or this is the expected driver behavior:
With a Microsoft LifeCam VX-3000 (045e:00f5) and gspca-sonixj, ioctl
VIDIOC_DQBUF intermittently blocks for exactly 3 seconds and then
returns EIO.
I noticed that it strongly depends on the captured scenery: when it's
changing much, everything is fine.
But when for example capturing the wall under constant (lower) light
conditions, I'm getting this error nearly permanently.

It's a JPEG-device, so I guess the device stops sending data if the
picture doesn't change and that's how it should be.
But is the long blocking + EIO the way drivers should handle this
situtation ?

Regards,
Frank Schaefer


             reply	other threads:[~2010-05-13 15:58 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-13 15:58 Frank Schaefer [this message]
2010-05-14  6:00 ` gspca-sonixj: ioctl VIDIOC_DQBUF blocks for 3s and retuns EIO Jean-Francois Moine
2010-05-14  7:26   ` Hans de Goede
2010-05-14 18:44     ` Frank Schaefer

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