[kubuntu] tearing in desktop with nvidia 200 series drivers and 660ti

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http://ubuntuforums.org – Hi all, since upgrading kubuntu 64bit to 12.10 i have tearing on the upper part of the desktop. i have vsync enabled both on nvidia panel and in system settings->desktop effects, in fact the same configuration was working fine up till now. i have the same problem with video on vlc (which was ok before, too) but not with kmplayer so i guess this is somethign i should ask on vlc forums... btw both are using vdpau naturally. these are my relevant specs: 660TI, kubuntu 64bit 12.10 with kde 4.9.2, nvidia drivers 210.14 from xorg-edgers. any help would be appreciated, manorba (Hardware)