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I'm installing D415 on ubuntu 16.04
On following the instruction manual https://github.com/IntelRealSense/librealsense/blob/master/doc/distribution_linux.md
, i ended up with an error on running realsense-viewer
"realsense-viewer
31/10 12:04:45,653 ERROR [140307828632128] (backend-v4l2.cpp:518) Cannot access /sys/class/video4linux"
My Kernel version is 4.15.0-36-generic
I googled and tried various solution but still no success. Please help!!
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In a previous case last month of this error at the same line (backend-v412.cpp line 518), the user corrected the problem by doing a completely fresh install. They believed the cause may have been that they had their kernel versions mixed up.
https://github.com/IntelRealSense/librealsense/issues/2427# issue-362556361 realsense-viewer: Cannot access /sys/class/video4linux · Issue # 2427 · IntelRealSense/librealsense · GitHub
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Installing fresh Ubuntu would take a lot of time since i have ROS packages and many other things installed.
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The official Ubuntu documentation has advice about removing old kernels. In practice though it may be too risky on your installation, as pulling out a kernel one or more of your programs depends on could create all sorts of problems.
https://help.ubuntu.com/community/RemoveOldKernels https://help.ubuntu.com/community/RemoveOldKernels
I wonder if an alternative would be to create a separate Ubuntu installation on a USB stick (a 'boot stick') just for Librealsense, so that you don't break your existing installation.
https://tutorials.ubuntu.com/tutorial/tutorial-create-a-usb-stick-on-ubuntu# 0 Create a bootable USB stick on Ubuntu | Ubuntu tutorials
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I solved the issue.
DO everything and just install sudo apt-get install realsense-uvcvideo
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Great news! I'm really pleased you found a solution. Thanks for letting us know!
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It was working fine till yesterday and now it doesn't even detect the camera. I'm getting the same old error "Cannot access /sys/class/video4linux"
Could you please help me resolve this issue.
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Hello shrijan00,
Could you please let us know the output of: lsusb ?
Also, could you please update the firmware to the latest release? Link to the instructions http:// https://www.intel.com/content/www/us/en/support/articles/000028171/emerging-technologies/intel-realsense-technology.html here and you can download the firmware from https://downloadcenter.intel.com/download/28237/Latest-Firmware-for-Intel-RealSense-D400-Product-Family here.
Looking forward to your reply!
Best regards,
Eliza
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Hi,
So i uninstalled and did once again, so it is working for now.
But when using the roslaunch i'm still getting this error but using rqt_image_view iḿ still able to see image but i think this error is either due to kernel issue or sdk.
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And when i run realsense-viewer, it works but in the terminal it keeps telling "UVC metadata payloads not available. Please refer to installation chapter for details."
My Kernel version is 4.15.0-36-generic
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Hello shrijan00,
On this https://github.com/intel-ros/realsense/issues/503 thread a solution for this error message is to install librealsense2-dkms with
sudo apt-get install librealsense2-dkms=1.3.1-0ubuntu3
I noticed that you have posted this issue on another thread too - https://intel-openport-v8.hosted.jivesoftware.com/thread/130792.
Would you agree to continue the conversation there to avoid redundancy?
Thank you,
Eliza
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Running that command, it doesn't even detect now. I removed it so at least it is working somehow withe warning
[ WARN] [1541544389.804503667]: Frame metadata isn't available! (frame_timestamp_domain = RS2_TIMESTAMP_DOMAIN_SYSTEM_TIME)
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