[Bug 52091] New: Screen fails to resize correctly to 640x480 / 16 bit depth with HD6450

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=52091

             Bug #: 52091
           Summary: Screen fails to resize correctly to 640x480 / 16 bit
                    depth with HD6450
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: rankincj at googlemail.com
         QAContact: xorg-team at lists.x.org


I have an old Windows game "Thomas & Friends - Railway Adventures" whose native
window size is 640x480. I believe its colour depth is 16 bits because Wine
shows this message:

fixme:x11drv:X11DRV_desktop_SetCurrentMode Cannot change screen BPP from 32 to
16

When I try to start the game in full-screen mode, the LHS of the game's window
disappears off-screen, leaving a large black gap on the RHS of the viewing
space. (In other words, the game's window seems to be rendered "off centre").

My current workaround is to tell Wine to use a 640x480 virtual desktop instead.
However, this is not ideal on a 1280x1024 monitor.

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