win32u: Set the virtual desktop display frequency to 60Hz.

Fix a regression from ee0aad5c, which changes the virtual desktop display frequency to that of the host display while adding modes of 60Hz. So when the host display is not 60Hz, we might get ChangeDisplaySettings() failures when virtual desktop is on because the target mode is not found because of the frequency difference.

win32u: Set the virtual desktop display frequency to 60Hz.
b918ce9e · Zhiyi Zhang · Alexandre Julliard · b44c3dc9 · b918ce9e
Commit b918ce9e authored Apr 30, 2024 by Zhiyi Zhang Committed by Alexandre Julliard Apr 30, 2024
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sysparams.c dlls/win32u/sysparams.c +1 -0

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--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -1900,6 +1900,7 @@ static BOOL desktop_update_display_devices( BOOL force, struct device_manager_ct
    if (!read_source_mode( ctx->source_key, ENUM_CURRENT_SETTINGS, &current ))
    {
        current = desktop_ctx.primary;
+        current.dmDisplayFrequency = 60;
        current.dmPelsWidth = screen_width;
        current.dmPelsHeight = screen_height;
    }