On Tue, 8 Sep 2020 at 18:34, Ranjan Maitra <mai...@email.com> wrote: > Dear friends, > > I have a strange situation that shows up only on F32 (only linux > distributions tried) but does not show up on Windoze or Muck. The way to > illustrate this is rather complicated, so I will first summarize. > > For my introductory students, I use a java-based front-end to R called > Deducer. I am able to install without a hitch and even bring it up and run > some functions and graphical displays. However, when I ask it to do a few > specific functions, the windows all come crashing down. So, my question is: > how do I figure out the source of the problem? I have used this program for > years, and including last spring under F31, and linux has never been an > issue. This has been tried on three F32 machines by me and a former student > and all have resulted in crashes. Embarrasingly, these continue to work as > expected with Windows and MacOS, though installation, especially for the > latter is a pain. >
It would be good to mention enough detail so others can reproduce your configuration: graphics hardware and driver: did the 3 machines use the same graphics hardware and drivers? graphics display server: wayland +xwayland or X11 JRE -- some Java apps require Oracle's proprietary JRE > How can I get error messages out of this mishap to file a meaningful and > targeted bug report? > https://www.linuxjournal.com/content/oops-debugging-kernel-panics-0 > > Any suggestions? > Ranjan > > > If you are interested, here is how I go about installing Deducer. I need > R-core installed, as well as curl-devel, and of course java. Other fedora > packages may also be needed. > > sudo dnf install R-devel curl-devel java-1.8.0-openjdk-devel > > then: > > sudo R > install.packages(c('JGR','Deducer')) > q() > > Note that the second line will ask for which repo to use, and any are > fine, the first one is from rstudio.com. Also, the installation function > may ask for more libraries to be installed. > > Once installed, go to R and inside R, type: > > library(JGR) > library(Deducer) > JGR() > > The last function call will open a graphical interface with a jaguar logo > (pretty cool). All is well. In the bottom window type: > data(cars) > > Then go to the graphical interface above, and under "Plots" -> "Quick" -> > "simple boxplot" > This opens a window, and put speed as x variable and run. > A window begins to open and the entire window system running JGR comes > crashing down. > Btw, since I know the commands to give in R, on the commandline, when I > call the function, things work as expected. It is only on the JGR() window > that it crashes. > Have you checked rJava and JGR bug reports? > > The worst part? I get no error messages. So, how can I get error messages > out of this mishap to file a meaningful and targeted bug report? > > Can you connect to the system with ssh or use a console <Alt Fn>? If so the kernel is still alive and the graphics system has crashed. If not, you can first try adjusting your configuration. The last resort is kernel debugging. This suggests a graphics issue. If you have been using wayland you should try the X11 server. if both graphics systems are failing you could try an Oracle JRE https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html . -- George N. White III
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