Why is the Usb Webcam not working on linux?

I have the Intel RealSense D435i depth camera. I tried using it on my windows 10 and matlab successfully detected the camera nad I was able to run the WebcamInLoop program given in matlab. But when I try using the same program with the same camera on Ubuntu OS, matlab is not detecting the camera. It gives different error such as,

1) mycam=webcam(2)

Error using webcam (line 116)

Error starting the webcam stream.

2) Sometimes it also gives the error, "Time out occured while trying to get a frame from the webcam".

3)Moreover, when I use the webcamlist command to view the number of devices connected, I see the same device name three times,

webcamlist

ans =

3×1 cell array

{'Intel(R) RealSense(TM) Depth Ca'}

{'Intel(R) RealSense(TM) Depth Ca'}

{'Intel(R) RealSense(TM) Depth Ca'}

This was not the case when I was using windows, I could see all three devices name i.e. laptop webcam, intel RGB camera and Intel Depth camera.

4) Also if I select the first camera, It shows only one resolution option i.e. 1920 x 1080, however, in windows, it had many options for resolution.

I have already installed Matlab USB Webcam support package and Image Acquisition toolbox. My operating system is ubuntu 16.04 LTS. I am using matlab 2019a. On windows I was using matlab 2018b.

I cannot figure out what the problem is when running the camera on linux through matlab.

[marawan azmy]

Hello, have you got a solution for problem number (4)?

because I have the same problem.

[Marina Baltz]

Was this ever resolved? I'm having the same issue with a d435.

[smsinks]

No I dont think it has been resolved. I have been having this issue from months...