Hello I have the same card 00:05.0 VGA compatible controller [0300]: nVidia Corporation C51PV [GeForce 6150] [10de:0240] (rev a2) and the same bug :)
I tested on current "testing" and have installed xserver-xorg-video-nv 1:2.1.10-1 My monitor is CRT iiyama hm903dt A -- Regards, Yuri Kozlov
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