Cannot download PNG in RStudio when choose "Canvas" [ubuntu 14.04]

[torchwoo]

USE RSTUDIO in my ubuntu os. plot: mtcars %>% ggvis(~wt, ~mpg) %>% layer_points() then Choose "Canvas", and click "Download PNG", then cannot save the PNG because the pop-window doesn't work any more.

Maybe, that's nothing with the ggvis. But to save "SVG", that works normal.

[bpostlethwaite]

We at Plotly just ran into this as well. Plotly, with thanks to the great work by @cpsievert, has just rolled out https://github.com/ropensci/plotly/tree/htmlwidgets and I am seeing the same bug with linux+Ubuntu machines (have not tried it out on other linux distros).

@hadley - do you have a recommendation on the best place to log this bug? It seems this is an RStudio issue and you might know best how to log this issue.

I have a few more pieces of information:

The download dialogue which opens when clicking an <a> element with a canvas DataURL as the href attribute (the way both Plotly and ggvis do PNG downloads) has its filename field filled out with the contents of the DataURL. This could be a cause of the unresponsive behaviour. RStudio actually segfaults occasionally when stimulating this code path.