On 1.5.1

On 2.x

I bisected the change to a903315 as indicated above

Thinking a bit more about this it seems like the issue is that the figure size depends on the DPI of the image generated which is should not.

I'm not seeing the fuzzyness in the second image. One would expect the image to be larger when increasing the DPI -- since figure size comes not from the notebook, but from a hard coded default in inches from matplotlibrc.

That said, I think we need to get better about communicating the best size from the notebook to matplotlib, which would resolve this issue. I don't recall if that's one of the things fixed by #5754 or not...

You are right of cause. The only thing that determines the figure size on screen is the number of pixels in the png which grows with dpi change.

That being said I still think the default figure size is way to large for the notebook now.

And I still see the fuzzyness.

Compare

1.5.1

2.x

2.x with dpi 80

I have scaled the figure size in these examples to create a figure with both the old and the new size by multiplying with 10/8 and 8/10 respectively

Is it possible for the notebook backend to ask the browser what it thinks the actual screen dpi is?

I don't think so -- the best you get is whether the browser is in "retina mode" (scaling) or not. But you can get the width of the cell, or the width of the document frame, which while not the same thing would allow us to shrink the figure accordingly to fit.

closed by #6290