Comment 10 for bug 157398

hackel, The exceedingly high DPI device is a head-mounted display, so yes, while it's an extreme case, I'd probably really run it at a fake DPI. That said, the same glass could be used to make a very detailed watch, but users would want to have full size characters, etc.

soc, Thanks for the extended research on this: I suspect that this bug is a duplicate of bug #118745 (albeit a different facet, against a different package), although with all tasks there either "Invalid" or "Fix Released", it may make sense to use this bug for revisiting the discussion. There's probably some other bugs that also affect things that would be exposed by undoing the existing workarounds though: some widgets are defined in terms of pixels, rather than in terms of size, which causes them to scale poorly for DPI adjustments, but I think it's worth tracking them separately: if using the detected DPI on some hardware doesn't result in the correct settings, the detection of that hardware ought be fixed, rather than trying to pick a standard default setting.