[Bug 394103] All elements are HUGE (when doing dpi autodetect?)

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--- Comment #80 from Johannes 'fish' Ziemke <mozilla-bugs at freigeist.org>  2008-04-10 14:20:18 PDT ---
I'v investigated that a little bit more. Seams that, at least now (don't know
whether that's the same as with the versions before, it happens there but i
don't know if only in this case), i can reproduce it every time that way:

Steps to reproduce:
1. Start X with only my laptop-display attached, external monitor's vga cable
is not plugged in. xdpyinfo shows:

  dimensions:    1024x768 pixels (246x185 millimeters)
  resolution:    106x105 dots per inch

2. Start firefox
3. Plug the external monitor in
4. Run xrandr --output VGA --left-of LVDS --mode 1024x768 -> the desktop gets
extended, xdpyinfo shows:

  dimensions:    2048x768 pixels (493x185 millimeters)
  resolution:    106x105 dots per inch

5. Open a new firefox window -> the bug occures

There are other combination where the bug does _NOT_ occurs:

Starting/restarting (stop+start) firefox after changing the desktop size with
xrandr -> everything is fine

and

Have the external monitor plugged in upon starting X (it will get to clone mode
without xrandr). In that case xdpyinfo shows:

  dimensions:    1024x768 pixels (269x201 millimeters)
  resolution:    97x97 dots per inch


After extending the desktop with the same xrandr command, xdpyinfo shows:

  dimensions:    2048x768 pixels (536x201 millimeters)
  resolution:    97x97 dots per inch

...and everything works fine..

So it seams to happens only if there is no second monitor attached on starting
X...


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