Invalid Value in rs2_get_option error after upgrading D435i to firmware 5.11.1.0

[ayu135]

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Required Info
Camera Model	D435i
Firmware Version	5.11.1.0
Operating System & Version	Linux (Ubuntu 16)
Kernel Version (Linux Only)	4.15.0-39-generic
Platform	PC
SDK Version	2.18.0
Language	C++/ROS
Segment	VR/AR

Issue Description

Hi after I upgraded the firmware on my realsense D435i to 5.11.1.0 the camera no longer streams any data even on the realsense viewer. I get an error saying:

Invalid Value in rs2_get_option(options:0x21ce000, option:Emitter On Off):
hwmon command 0x7d failed. Error type: Invalid Command (-1).

I get the same error when running the rs_camera.launch file from the ROS wrapper and also get the same error in realsense-viewer. I tried various things like re-plugging the sensor, rebooting my PC and hardware resetting, nothing seems to solve this issue. I was able to get the realsense to work again but only if I downgrade the firmware to the previous version(5.10.13). I thing the error is specific to the latest 5.11 firmware.

[waseda-octopus-uehara]

I also got this error too.
Does anyone know the solution against this error?

[ayu135]

For now reverting back to an older version of the firmware seems to be the only thing that fixes the issue for me.

[waseda-octopus-uehara]

I could not downgrade the version of librealsense sdk 2.0(build 2.7.XX, I forgot)
Cloud you tell me how to downgrade?

[ayu135]

You don't need to downgrade the librealsense SDK just the firmware of your device using the DFU tool

[ev-mp]

Hello @ayu135 ,
The issue will be resolved by the following PR.
In the meanwhile you can either apply it manually, or disregard.

[ayu135]

Thanks, that solves it for me I am closing the issue

[bormy]

@ayu135 would you mind sharing the step to resolve this issue?

Regards,
Bormy

[dorodnic]

@bormy - if you download the latest version (v2.18.1) you should no longer see the issue