On Thu, 13 May 2010 17:58:49 +0200 Frank Schaefer <fschaefer.oss@xxxxxxxxxxxxxx> wrote: > 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 ? Hello Frank, You are right, this is a bug. I did not know that a webcam could suspend streaming when the image did not change. I will remove the timeout. Thanks. -- Ken ar c'hentañ | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/ -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
