Issue Description

I open realsense viewer and start color stream in RGB8, which results in a blank screen.
Depth, infrared streams and color stream in YUYV format work fine. The only color stream format that works is YUYV.
When I sync and build librealsense with "tags/v2.14.1" everything works correct (all color stream formats work). When I sync and build with "tags/v2.15.0" I get blank output for RGB8 color stream.
My kernel is patched and "hardware clock" is shown when I click on "info" in the depth stream window.

This is the console output - the last line with "Non-zero status (-71) in video completion handler." looks fishy:

[ 208.314353] usb 4-1.2: new SuperSpeed USB device number 3 using xhci-hcd
[ 208.335144] usb 4-1.2: New USB device found, idVendor=8086, idProduct=0ad3
[ 208.335150] usb 4-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 208.335155] usb 4-1.2: Product: Intel(R) RealSense(TM) 415
[ 208.335160] usb 4-1.2: Manufacturer: Intel(R) RealSense(TM) 415
[ 208.335165] usb 4-1.2: SerialNumber: 812113024034
[ 208.368715] videobuf2_vmalloc: loading out-of-tree module taints kernel.
[ 208.374167] uvcvideo: Found UVC 1.50 device Intel(R) RealSense(TM) 415 (8086:0ad3)
[ 208.376065] uvcvideo: Unable to create debugfs 4-3 directory.
[ 208.376250] uvcvideo 4-1.2:1.0: Entity type for entity Intel(R) RealSense(TM) 415 RGB was not initialized!
[ 208.376258] uvcvideo 4-1.2:1.0: Entity type for entity Processing 2 was not initialized!
[ 208.376266] uvcvideo 4-1.2:1.0: Entity type for entity Intel(R) RealSense(TM) 415 RGB was not initialized!
[ 208.376272] uvcvideo 4-1.2:1.0: Entity type for entity Camera 1 was not initialized!
[ 208.376500] input: Intel(R) RealSense(TM) 415: Int as /devices/platform/soc/soc:usb3-0/12000000.dwc3/xhci-hcd.3.auto/usb4/4-1/4-1.2/4-1.2:1.0/input/input6
[ 208.376898] uvcvideo: Found UVC 1.50 device Intel(R) RealSense(TM) 415 (8086:0ad3)
[ 208.377249] uvcvideo: Unable to create debugfs 4-3 directory.
[ 208.377369] uvcvideo 4-1.2:1.3: Entity type for entity Processing 7 was not initialized!
[ 208.377376] uvcvideo 4-1.2:1.3: Entity type for entity Extension 8 was not initialized!
[ 208.377382] uvcvideo 4-1.2:1.3: Entity type for entity Camera 6 was not initialized!
[ 208.377592] usbcore: registered new interface driver uvcvideo
[ 208.377596] USB Video Class driver (1.1.1)
[ 380.462643] uvcvideo: Non-zero status (-71) in video completion handler.