The background of KDE/Qt menus is not rendered. Apart from that xserver-xorg-ati seems to work very well (including suspend/resume and adjustment of screen brightness).
Please attach the Xorg log file.
Created attachment 121397 [details] Xorg.0.log Hi, here's the log file
Probably a duplicate of bug 64297, fixed in current xserver/xf86-video-ati.
Ok, thanks for looking into it. Hope the bugfix makes it into Debian Stretch.
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