problem

[Ilya]

I'm getting flashing color in lower half of image at resolutions
640x480 and 320x240. Resolution 160x120 is fine. TEAC webcamera USB ID
0c45:6270, stock 3.2.0-2-amd64 kernel. (I guess it may actually be
hardware problem.)

[israel katz]

Depends on which operating system you use. I got plenty of problems
with Microdia two years ago, I changed the camera to 4tech and all
those problems disappeared. It is really very nice , easy to operate,
not expensive and very high pixel rate. For me it was realy good
solution.

> --
> Lets make microdia webcams plug'n play, (currently plug'n pray)
> To post to this group, send email to micr...@googlegroups.com
> Visit us online https://groups.google.com/group/microdia



--
Israel 1234

[Ilya]

I tried kernel 2.6.35.4, in it everything seems to work.

[Ilya]

It seems that in 3.2 kernel much smaller packet size is allocated than in 2.6 kernel.
There must have been some change in the USB subsistem. The following patch works for
me but it must affect too many cameras to put it in public system:

--- gspca.c.orig    2012-08-08 09:15:41.000000000 +0300
+++ gspca.c    2012-08-08 09:17:14.000000000 +0300
@@ -839,7 +839,7 @@
 
     /* do the specific subdriver stuff before endpoint selection */
     intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
-    gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
+    gspca_dev->alt = intf->num_altsetting;
     if (gspca_dev->sd_desc->isoc_init) {
         ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
         if (ret < 0)

 

[israel katz]

My dear friend the camera technology is changing so fast and the price
is going down. Take care if the time you are spending on old
unnecessary technology is worth your while. There are so many things
to do to enjoy and enrich your knowledge and control of the computer
than to fight an MICRODIA camera.

[Ilya]

It seems that the bandwith issues were fixed in kernel 3.5.0