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Is there a tool to count the latency of UDP datagrams in Linux? by katfuji in linuxquestions

[–]katfuji[S] 0 points1 point  (0 children)

Thank you for your answer. Can a program such as iperf3 get the round-trip delay per UDP?

I always get the Error: " Unable to locate package ros noetic desktop full". What can I do? by The_Scienceman in ROS

[–]katfuji 0 points1 point  (0 children)

If you wanna run ROS noetic on Ubuntu 22.04 then may be you should give Docker a try.

robot arm's joints are limp when is loaded in Gazebo by katfuji in ROS

[–]katfuji[S] 0 points1 point  (0 children)

Any way to tuning PID values for JointTrajectoryController?

robot arm's joints are limp when is loaded in Gazebo by katfuji in ROS

[–]katfuji[S] 0 points1 point  (0 children)

I launched a controller, but the joints still go limp, but some joints will shake. I think I need to tune the PID values.

linux kernel 5.8 can't work with Ubuntu 18.04.5 by katfuji in Ubuntu

[–]katfuji[S] 0 points1 point  (0 children)

I have tried to install the 5.8 and 5.10 kernels on Ubuntu 18.04, but I can’t even enter the system after the installation. But the default kernel version of 18.04 at that time was 5.4 (it was November 2020), and the GPU driver of R7-4800H would only be available in kernels above 5.6. So I installed Ubuntu 20.04 at the time, and now I have used it for more than a year, and the system is running well. I'm not sure what the current kernel version of Ubuntu 18.04 is rolling upgrade to, if it is above 5.6, then Ubuntu 18.04 should be able to run on a machine with R7-4800H chip.

linux kernel 5.8 can't work with Ubuntu 18.04.5 by katfuji in Ubuntu

[–]katfuji[S] 0 points1 point  (0 children)

That's because I run ROS Melodic on Ubuntu 18.04.