bug#18912: 24.4; mode-line corruption on graphical frames in dual-headed display

[martin rudalics <rudalics@gmx.at>]

 > Here is the result for the *corrupted* frame:
 >
 >    frame pixel: 756 x 669   cols/lines: 84 x 37   units: 9 x 18
 >    frame text pixel: 720 x 667   cols/lines: 80 x 37
 >    tool: 36  scroll: 16  fringe: 18  border: 1  right: 0  bottom: 0
 >
 >    #<window 3 on dev>   parent: nil
 >    pixel left: 0   top: 36   size: 754 x 613   new: 0
                                            ^^^
					
This is consistent with what you reported earlier, namely

   Bad configuration (both VGA1 and LVDS1 enabled):

   (window-height) ==> 34
   (window-pixel-height) ==> 613

 >    char left: 0   top: 2   size: 83 x 34   new: 0
 >    normal: 1.0 x 1.0   new: 0
 >    body pixel: 720 x 595   char: 80 x 33
 >    width left fringe: 9  left margin: 0  right margin: 0
 >    width right fringe: 9  scroll-bar: 16  divider: 0
 >    height header-line: 0  mode-line: 18  divider: 0
 >
 >    #<window 4 on  *Minibuf-0*>   parent: nil
 >    pixel left: 0   top: 649   size: 754 x 18   new: 0
 >    char left: 0   top: 36   size: 754 x 1   new: 0
 >    normal: 1.0 x 1.0   new: 0
 >    body pixel: 720 x 18   char: 80 x 1
 >    width left fringe: 9  left margin: 0  right margin: 0
 >    width right fringe: 9  scroll-bar: 16  divider: 0
 >    height header-line: 0  mode-line: 0  divider: 0
 >
 >
 > Here is the result for the *good* frame:
 >
 >    frame pixel: 756 x 669   cols/lines: 84 x 37   units: 9 x 18
 >    frame text pixel: 720 x 667   cols/lines: 80 x 37
 >    tool: 36  scroll: 16  fringe: 18  border: 1  right: 0  bottom: 0
 >
 >    #<window 3 on dev>   parent: nil
 >    pixel left: 0   top: 36   size: 754 x 613   new: 0
                                            ^^^

This is not consistent with what you reported earlier, namely

   Good configuration (only VGA1 enabled):

   (window-height) => 34
   (window-pixel-height) => 612

 >    char left: 0   top: 2   size: 83 x 34   new: 0
 >    normal: 1.0 x 1.0   new: 0
 >    body pixel: 720 x 595   char: 80 x 33
 >    width left fringe: 9  left margin: 0  right margin: 0
 >    width right fringe: 9  scroll-bar: 16  divider: 0
 >    height header-line: 0  mode-line: 18  divider: 0
 >
 >    #<window 4 on  *Minibuf-0*>   parent: nil
 >    pixel left: 0   top: 649   size: 754 x 18   new: 0
 >    char left: 0   top: 36   size: 754 x 1   new: 0
 >    normal: 1.0 x 1.0   new: 0
 >    body pixel: 720 x 18   char: 80 x 1
 >    width left fringe: 9  left margin: 0  right margin: 0
 >    width right fringe: 9  scroll-bar: 16  divider: 0
 >    height header-line: 0  mode-line: 0  divider: 0

Can you try getting the results of `window--dump-frame' for these old
(good and bad) configurations, that is with the build you used in your
initial report?  I'd want to see different pixel heights (not 669) for
these two frames but can't tell anything unless the pixel height (612)
of the good window reemerges.

So try first to get the different (window-pixel-height) values back and
then evaluate (window--dump-frame) instead of (window-pixel-height).

Thanks, martin