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bug#21658: 24.5; Scrolling garbles text with third monitor enabled
From: |
Eli Zaretskii |
Subject: |
bug#21658: 24.5; Scrolling garbles text with third monitor enabled |
Date: |
Mon, 12 Oct 2015 21:35:51 +0300 |
[Please keep the bug address on the CC list.]
> Date: Mon, 12 Oct 2015 18:21:08 -0000 (GMT)
> From: me@alandmoore.com
>
> > Are the problematic frames/windows displayed on the 3rd monitor?
> >
> > Do the coordinates of the frames on the 1st and the 2nd monitor change
> > when you enable the 3rd monitor?
> >
> > If the answer to both of these questions is NO, then I cannot see how
> > it could be an Emacs problem. It could be some hardware problem or
> > perhaps a bug in the underlying X libraries/server. AFAIK, when Emacs
> > redraws a window on a monitor, it doesn't inquire the system about the
> > monitors, the only thing it cares about is pixel coordinates of
> > windows and frames.
> >
>
> The frames do the same thing on any monitor. I don't think the
> coordinates should change at all, the additional monitor is appended to
> the right of the others (though it makes no difference where I add it,
> even if I just clone one of the other screens).
>
> Is there anything special about the way emacs buffers are drawn compared
> to other programs that would give me a clue as to why this only happens in
> emacs?
We just use Xlib calls, see xterm.c and xfns.c.