On Fri, 16 Mar 2012 08:53:51 +1100 Xavion <xavion.0@xxxxxxxxx> wrote: > As you can probably gather from the attached screenshots, I'm > attempting to use my SN9C201 webcam for home security. The problem is > that it succumbs to external glare during the middle hours of sunny > days when used in Linux. > > The same problem doesn't occur in Windows, probably since the software > automatically adjusts to the current lighting conditions. These > screenshots were taken only five minutes apart and the sunlight > intensity didn't change much in-between. > > No amount of adjusting the webcam's settings (via V4L2-UCP) seemed to > make any significant difference. For this reason, I'm guessing that > there's at least one other adjustable setting that the GSPCA driver > isn't tapping into yet. [snip] Hi Xavion, It seems that the exposure is not set correctly. May you try the patch below? (to be applied to the gspca test version 2.15.7 - the exposure may be too low at init time, set it to 800) --- build/sn9c20x.c~ +++ build/sn9c20x.c @@ -1650,10 +1650,9 @@ case SENSOR_OV7670: case SENSOR_OV9655: case SENSOR_OV9650: - exp[0] |= (3 << 4); - exp[2] = 0x2d; - exp[3] = expo; - exp[4] = expo >> 8; + exp[0] |= (2 << 4); + exp[2] = 0x10; /* AECH */ + exp[3] = expo * 255 / 0x1780; break; case SENSOR_MT9M001: case SENSOR_MT9V112: -- 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
