Hello, I'm running Linux 3.18.2. I have a "generic" Easycap device that I would like to use, however it appears that my particular revision of this device is not supported. The VID/PID of the device is 05e1:0408, in fact the whole USB descriptor is the same as the "reference" one available on the LinuxTV Wiki page - http://www.linuxtv.org/wiki/index.php/Stk1160_based_USB_2.0_video_and_audio_capture_devices . The stk1160 driver detects the device and I can successfully capture video through the device node. However, the AC97 codec available on the board does not seem to be initialized at all, with the following kernel message : stk1160 2-1.1.2.4:1.0: AC'97 0 access is not valid [0x0], removing mixer. Which means that the AC97 vendor ID has been read as either 0 or 0xff..ff. According to the aforementioned LinuxTV Wiki page, this error occurs when the particular Easycap stick uses the 8-bit ADC instead of a full AC97 codec. I had a look at the PCB itself, and it seems to contain the following chips : * Syntek STK1160, * Philips SAA7113, * Realtek ALC655. For your reference, photos of the PCB are available here : http://i.imgur.com/tl6pb3C.jpg , http://i.imgur.com/ONWf5ir.jpg . I also backported the old easycap driver to run on my kernel, however the effect was exactly the same : the video is captured successfully, but there is no audio. There is only a short burst of noise at the start of the capture, which doesn't even occur with stk1160. I'm really curious what may be wrong in this case. Is it possible that the initialization of the AC97 codec fails due to another slight modification of the hardware, or should I just assume that the hardware is simply faulty? What can I do to further track down this problem? Thank you very much in advance, -dkk -- 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
