Screen low resolution

[gil]

Hi,
i have a problem with driver video, on my Fedora 21 KDE i686
any ideas?
thanks in advance
- gil

lspci -nn |grep VGA
04:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT216 
[GeForce GT 220] [10de:0a20] (rev a2)

xrandr --verbose
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 (0x17c) normal (normal) 0mm x 0mm
         Identifier: 0x17b
         Timestamp:  57188
         Subpixel:   unknown
         Clones:
         CRTC:       0
         CRTCs:      0
         Transform:  1.000000 0.000000 0.000000
                     0.000000 1.000000 0.000000
                     0.000000 0.000000 1.000000
                    filter:
   1024x768 (0x17c) 47.972MHz *current
         h: width  1024 start    0 end    0 total 1024 skew    0 clock  
46.85KHz
         v: height  768 start    0 end    0 total  768 clock  61.00Hz
   800x600 (0x17d) 29.280MHz
         h: width   800 start    0 end    0 total  800 skew    0 clock  
36.60KHz
         v: height  600 start    0 end    0 total  600 clock  61.00Hz
   640x480 (0x17e) 18.432MHz
         h: width   640 start    0 end    0 total  640 skew    0 clock  
28.80KHz
         v: height  480 start    0 end    0 total  480 clock  60.00Hz