Package: feedgnuplot Version: 1.57-1 Severity: important Tags: upstream I cannot get dynamic plots to work on my system. To rule out a user error on my end, I quickly limited myself to the example from the manpage (adjusted to my network interface enp6s0):
while true; do sleep 1; cat /proc/net/dev; done | gawk '/enp6s0/ {if(b) {print $2-b; fflush()} b=$2}' | feedgnuplot --lines --stream --xlen 10 --ylabel 'Bytes/sec' --xlabel seconds This opens up a gnuplot window but it is not updating every second as it should. The lower left corner seems to be showing a coordinate and this indeed updates every second, but the plot itself does not. From time to time the plot gets redrawn but then again stays fixed. In order to get more information on the possible culprit, I checked this script on Ubuntu 18.04 and Debian Buster and on both systems it works fine. Of course the gnuplot and feedgnuplot versions are different. I also cloned feedgnuplot from git without any effect, but sure enough the Bullseye package is only a single commit behind git main and that commit is a documentation change. Doing more diagnosing, I used the --dump switch to see what is being fed into gnuplot and when I manually run gnuplot and paste the fragments into it, it works just fine. It seems to be related with the fact that gnuplot reads the input from the pipe. Maybe this is related to the gnuplot version in Bullseye? Thanks in advance Detlev -- System Information: Debian Release: bullseye/sid APT prefers testing APT policy: (500, 'testing'), (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 5.10.0-3-amd64 (SMP w/8 CPU threads) Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages feedgnuplot depends on: ii gnuplot-x11 [gnuplot-nox] 5.4.1+dfsg1-1 ii liblist-moreutils-perl 0.430-2 ii perl 5.32.1-3 feedgnuplot recommends no packages. Versions of packages feedgnuplot suggests: pn vnlog <none>