Running Intel Realsense R200 Depth Camera on Ubuntu 18.04 LTS

Question

Im trying to run Intel Realsense R200 depth camera on Ubuntu 18.04 LTS.

My kernel is 4.18.0-20-generic I followed instructions on this link

but still I'm getting the following messages when I connect the camera:

    mkhuthir@MuthDT:~$ sudo dmesg 
[   90.024833] usb 2-6: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[   90.048411] usb 2-6: New USB device found, idVendor=8086, idProduct=0a80, bcdDevice=14.8a
[   90.048418] usb 2-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   90.048423] usb 2-6: Product: Intel RealSense 3D Camera R200
[   90.048428] usb 2-6: Manufacturer: Intel Corp
[   90.048433] usb 2-6: SerialNumber: SN_2521000848
[   90.052025] uvcvideo: Found UVC 1.10 device Intel RealSense 3D Camera R200 (8086:0a80)
[   90.055350] uvcvideo 2-6:1.0: Entity type for entity Extension 2 was not initialized!
[   90.055355] uvcvideo 2-6:1.0: Entity type for entity Camera 1 was not initialized!
[   90.056538] uvcvideo: Found UVC 1.10 device Intel RealSense 3D Camera R200 (8086:0a80)
[   90.059616] uvcvideo: Unable to create debugfs 2-2 directory.
[   90.059977] uvcvideo 2-6:1.2: Entity type for entity Camera 4 was not initialized!
[   90.060141] input: Intel RealSense 3D Camera R200: as /devices/pci0000:00/0000:00:14.0/usb2/2-6/2-6:1.2/input/input24
[   90.061349] uvcvideo: Found UVC 1.10 device Intel RealSense 3D Camera R200 (8086:0a80)
[   90.068243] uvcvideo: Unable to create debugfs 2-2 directory.
[   90.068556] uvcvideo 2-6:1.4: Entity type for entity Processing 7 was not initialized!
[   90.068564] uvcvideo 2-6:1.4: Entity type for entity Camera 6 was not initialized!
[   90.068866] input: Intel RealSense 3D Camera R200: as /devices/pci0000:00/0000:00:14.0/usb2/2-6/2-6:1.4/input/input25

When I try any of the included examples I get the following:

mkhuthir@MuthDT:/usr/local/bin$ ./rs-hello-realsense 
RealSense error calling rs2_pipeline_start(pipe:0x55d01fb185f0):
    No device connected
mkhuthir@MuthDT:/usr/local/bin$

issue seems to be with uvcvideo. Can any one give me some hint on how to fix it?