firefox/minefield screen resolution
darrell pfeifer
darrellpf at gmail.com
Sat Feb 16 04:29:41 UTC 2008
On Fri, Feb 15, 2008 at 7:04 PM, Felix Miata <mrmazda at ij.net> wrote:
> On 2008/02/15 09:46 (GMT-0800) darrell pfeifer apparently typed:
>
>
> >> darrell pfeifer pisze:
>
> >> > In today's rawhide firefox/minefield seems to have an incorrect
> >> > impression of the screen size.
>
> >> > The icons are very large. Any web page I go to I need to zoom out. It
> >> > feels like firefox thinks that the screen is 800x600 rather than
> >> > 1900x1200.
>
> >> > This also happened about a week ago and magically corrected itself.
>
> >> > I checked bugzilla for both firefox and nodoka related problems but
> >> > don't see anything.
>
> >> > Any idea what component might be causing this?
>
>
> > Everything is very big. The navigation buttons, bookmark toolbar
> > icons, etc are all huge. For any new web page that is opened the
> > entire content is also huge. Zooming out two or three times gets the
> > web page down to a decent readable size.
>
> > I'd say that the problem is with DPI detection for firefox. Not other
> > applications seem to be affected. The only exception is that gnome
> > Appearance/Theme/Customize/Icons shows some big/blurry icons for
> > Crystal SVG and Slick Icons.
>
> > xdpyinfo says
>
> > screen #0:
> > dimensions: 1920x1200 pixels (300x230 millimeters)
> > resolution: 163x133 dots per inch
>
> You've run into a relatively new Gecko "feature", pixel scaling for high DPI systems. See https://bugzilla.mozilla.org/show_bug.cgi?id=378927 for upstream bugs about this. You can confirm this by visiting http://mrmazda.no-ip.com/auth/dpi-screen-window.html to see reported DPI and default FF px setting will probably be about half what xdpyinfo and 'xrdb -query | grep dpi' report.
>
> The crossover point is 144 DPI. As long as your X DPI is below this, FF will behave as you are used to. If your system is really a 163 DPI system, and you don't like the scaling effects, you'll have to reconfigure something so that FF thinks or knows the DPI is less than 144. In about:config you could set layout.css.dpi to 143 as a direct workaround. Also you could set the system's Xft.dpi to less than 144.
>
> If your system is not really a 163 DPI system, you need to reconfigure X so FF doesn't think that's what it is.
> --
Thanks for the information, it really helped.
xrdb reports:
Xft.dpi: 120
Setting that value in about:config gives a decent display. If I go
higher (say the 143) then portions of the window on the right and
bottom aren't visible.
I'm assuming that the value from xdpyinfo is probably incorrect,
though I don't know at this point where to look.
darrell
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