Update README.md: Add --web=off for graphics#101
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Sangbaek wants to merge 1 commit intoroot-project:masterfrom
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Update README.md: Add --web=off for graphics#101Sangbaek wants to merge 1 commit intoroot-project:masterfrom
Sangbaek wants to merge 1 commit intoroot-project:masterfrom
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## Trouble
My machine prints out the following message when I executed the suggested command, `docker run -it -v ${PWD}:/home/${USERNAME} -e DISPLAY=host.docker.internal:0 rootproject/root:latest root`, under `Enabling Graphics` at [README.md](https://github.com/root-project/root-docker/blob/master/README.md):
```
Find more info on https://root.cern/for_developers/root7/#rbrowser
Info in <THttpEngine::Create>: Starting HTTP server on port 127.0.0.1:9642
ROOT web-based widget started in the session where DISPLAY set to host.docker.internal:0
Means web browser will be displayed on remote X11 server which is usually very inefficient
One can start ROOT session in server mode like "root -b --web=server:8877" and forward http port to display node
Or one can use rootssh script to configure port forwarding and display web widgets automatically
Find more info on https://root.cern/for_developers/root7/#rbrowser
This message can be disabled by setting "WebGui.CheckRemoteDisplay: no" in .rootrc file
sh: 1: xdg-open: not found
```
## Solution
This can be solved by updating the `root` with `bash -c 'root -l --web=off'.
pcanal
reviewed
Jun 30, 2025
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| ``` | ||
| docker run -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix --rm -it --user $(id -u) rootproject/root root | ||
| docker run -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix --rm -it --user $(id -u) rootproject/root bash -c 'root -l --web=off' |
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This seems counter to the intent of the example (which is to use the new graphics).
Did you investigate why you get the error message:
sh: 1: xdg-open: not found`
?
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Trouble
My machine prints out the following message when I executed the suggested command,
docker run -it -v ${PWD}:/home/${USERNAME} -e DISPLAY=host.docker.internal:0 rootproject/root:latest root, underEnabling Graphicsat README.md:Solution
This can be avoided by replacing
rootwithbash -c 'root -l --web=off'.