Hi.
Available controls in libwebcam depend on whether the hardware supports them or 
not.

If this was supported before then I think it may be an extension control and 
udev is not executing the uvcdynctrl script properly. 
This script is responsible for loading extension controls into the uvc driver.
I already have a report on udev 220 failing to run it, it seems the 
ID_VENDOR_ID variable is not defined. 

manually loading the controls seems to work:
uvcdynctrl -d /dev/video0 --addctrl=vid:pid      <-replace vid and pid by the 
actual values for your device  (e.g: 046d:0990)

In any case 15.04 I think is running 219 and I have no reports on that
version.

Regards,
Paulo

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https://bugs.launchpad.net/bugs/1468848

Title:
  Webcam LED behaviour cannot be configured

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