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Bug#878084: xserver-xorg-core: XShmGetImage() improperly crops returned image (regression from 1.18.4)



Package: xserver-xorg-core
Version: 2:1.19.3-2
Forwarded: https://bugs.freedesktop.org/show_bug.cgi?id=101730
Affects: gnome-flashback

Dear maintainers,

As the upstream bug says, in xorg-server 1.19.3, XShmGetImage() incorrectly
crops the image grab to the absolute region (x,y)-(x+w,y+h). The comments in
that bug also contain instructions on how to reproduce it.

This affects gnome-flashback, where screenshots of CSD windows get broken.

If there is no easy way to fix it, maybe you can temporarily revert upstream
commit [1] or at least part of it?

[1]: https://cgit.freedesktop.org/xorg/xserver/commit/?id=6c6f09aac7f1d136

--
Dmitry Shachnev

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