New subject: [Bug 59193] Wine and MT4 don't work together very well

30 Dec 2025

      http://bugs.winehq.org/show_bug.cgi?id=59193

            Bug ID: 59193
           Summary: Wine and MT4 don't work together very well
           Product: Wine
           Version: 9.0
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs@list.winehq.org
          Reporter: j-nws23@planet.nl
      Distribution: ---

✅ WINE Bug Report 

Author: ChatGPT

Title:
MT4 floating “Market Watch” window forces Wine topmost/focus-stealing behavior
for all Wine windows

Wine version:
9.0~repack-4build3 (Ubuntu package)

Distribution:
Linux Mint 22.2
Cinnamon 6.4.8
Muffin (X11 session)

Application affected:
MetaTrader 4 (MT4), build 1443
Also affects unrelated Wine applications (IrfanView, winecfg, etc.)

Overview

When MetaTrader 4's Market Watch panel is set to floating, MT4 triggers a
Wine-wide focus and stacking problem:

MT4’s main window and its floating windows become always-on-top

Hovering the mouse over MT4 steals focus without clicking

Other Wine applications (e.g., IrfanView, Winecfg) become topmost or behave
incorrectly

Docking the Market Watch window immediately restores normal behavior

The issue does not occur in native Windows

The bug appears to be caused by how MT4 requests window styles for the floating
tool window, and how Wine interprets them.

Steps to Reproduce

Install MetaTrader 4 build 1443 in Wine 9.0 on Linux Mint 22.2 Cinnamon (X11).

Start MT4.

Open View → Market Watch.

Right-click the Market Watch panel and select Docked → uncheck (floating mode).

Move the floating Market Watch panel anywhere.

Move the mouse over MT4 or over other Wine windows such as Winecfg or
IrfanView.

Actual Behavior

MT4 forces itself to the top of the stacking order.

MT4 grabs focus on mouse hover, without any click.

Any other Wine window:

may be pushed behind MT4

may adopt the same "tool window" styling

may become unresponsive to normal focus rules

Behavior persists until Market Watch is docked again.

Expected Behavior

MT4 floating tool windows should not force global focus-stealing.

Other Wine applications should retain normal stacking and focus behavior.

Floating Market Watch should behave like the floating Data Window, which does
not cause any of these issues.

Additional Notes

The issue occurs even with a fresh Wine prefix.

Both “direct rendering” and Mesa/i915 driver stack are normal.

No compositor issues exist (Cinnamon compositor fully active).

This behavior did not happen on Windows.

MT4’s Data Window uses a different style and does not trigger the bug,
suggesting MT4 applies the WS_EX_TOOLWINDOW or WS_EX_TOPMOST flag to Market
Watch but Wine may be misinterpreting or forcing additional behaviors.

Suggested Component

Likely related to:

win32u

user32

window style handling for tool windows

Workaround

Docking the Market Watch window restores normal behavior and stops focus
stealing.

Impact

This behavior makes MT4 nearly unusable under Wine with floating panels and
affects unrelated Wine applications by corrupting stacking and focus behavior
across the session.

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[Bug 59193] New: Wine and MT4 don't work together very well

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