Affects me too, on 13.10 with Intel HD 3000 and NVIDIA GT 540M (bumblebee 3.2.1 and kernel 3.10.0.6)
It reproducable for both gnome-screenshot and ksnapshot from KDE. If I select 'window area' in ksnapshot and than press 'take snapshot', target window becomes black even before taking screenshot.
Affects me too, on 13.10 with Intel HD 3000 and NVIDIA GT 540M (bumblebee 3.2.1 and kernel 3.10.0.6)
It reproducable for both gnome-screenshot and ksnapshot from KDE. If I select 'window area' in ksnapshot and than press 'take snapshot', target window becomes black even before taking screenshot.
Output of 'lspci | grep VGA':
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 540M] (rev ff)