webcamd, pwc and vga

[Hans Petter Selasky]

On 12/25/14 18:29, Eugene M. Zheganin wrote:
> Hi.
>
> On 25.12.2014 19:33, Hans Petter Selasky wrote:
>>
>> You maybe need to set some further debug knobs:
>>
>> See output from "webcamd -s".
>>
> There's so many of them...
> I tried to launch webcamd with "-m hid-core.debug=1 -m
> videobuf-core.debug=1 -m videobuf2-core.debug=1 -m
> usbvision-core.core_debug=1 -m linux_usb.min_bufsize=512", no new debug
> messages were shown. Could you please point me to the direction where I
> can understand which ones to use ? I found only one pwc-related knob,
> but it's about the powersave.
>
> I've also found a thread on a russian community board (unfortunately, in
> russian) with similar issue (and the author didn't get any luck) which
> made me realize that may be it's not the upgrade to 10.x that left me
> without vga mode, but the upgrade from i386 to amd64, which I remember I
> have done too, around the point where vga stopped to work.
>

Can you dump the USB descriptors for you webcam. It will give some clues 
about which driver is used:

usbconfig -d X.Y dump_device_desc dump_curr_config_desc


--HPS