Comment 122 for bug 215604

The driver receives the image and make nothing on it, so either there is a post-processing step,either the initialization sequence has an effect on the webcam image quality and the drivers does not respect it as good as in Windows. IMHO the first is more likely. Playing with settings did not help ? You can try that with VLC. A test may be carried out with Windows using sniffUSB
(http://www.pcausa.com/Utilities/UsbSnoop/default.htm). We log the USB data exchanges while making a screenshot. From the log I can extract the image and compare it the screen shot. Tell me if you are interested in doing such a test.

About Skype, did you try it with LD_PRELOAD. AFAIK it is required with Skype.

You had no trouble compiling with "./inst_gl860 -m"? I got report of failure and I was going there to write about that!