[Bug 44855] New: reset gamma for screen even if set gamma by xrandr already

https://bugs.winehq.org/show_bug.cgi?id=44855

Bug ID: 44855
           Summary: reset gamma for screen even if set gamma by xrandr
                    already
           Product: Wine
           Version: 3.4
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

when i login desktop i will set screen gamma by 'xrandr --output --gamma
0.9:0.9:0.9'. if i play some game such as Titan Quest with virtual desktop
mode, afer start the app the screen restore gamme to default 1, desktop
brighter. if i reset gamma by xrandr again while keeping the game running, then
exit the game, 
screen gamme restore to default 1 again.

how to change the code of xvidmode.c (X11DRV_XF86VM_SetGammaRamp) or reg key to
make only effect viurtal desktop itself?

regards.