Wrong Screen Resolution after uninstalling nvidia packages from rpmfusion

My physical screenis 1280x800. It is the screen of a Dell Latitude E6500 laptop. Now, all gui app windows are being displayed as if my physical screen is 1280x760, and the app's window is 1280x800, thus I can pan the window up and down by moving the mouse to top of screen or bottom of screen. This resizing happened AFTER I uninstalled the rpmfusion nvidia packages: xorg-x11-drv-nvidia.x86_64 xorg-x11-drv-nvidia-304xx.x86_64 xorg-x11-drv-nvidia-304xx-devel.x86_64 xorg-x11-drv-nvidia-304xx-libs.x86_64 xorg-x11-drv-nvidia-libs.x86_64 xrandr reports: # xrandr --verbose xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1280 x 768, maximum 1280 x 768 default connected 1280x768+0+0 (0x186) normal (normal) 0mm x 0mm Identifier: 0x181 Timestamp: 55232 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: 1280x720 (0x182) 0.000MHz h: width 1280 start 0 end 0 total 1280 skew 0 clock 0.00KHz v: height 720 start 0 end 0 total 720 clock 0.00Hz 1024x768 (0x183) 47.972MHz 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 (0x184) 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 (0x185) 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 1280x768 (0x186) 0.000MHz *current h: width 1280 start 0 end 0 total 1280 skew 0 clock 0.00KHz v: height 768 start 0 end 0 total 768 clock 0.00Hz Is there a way to restore it back to physical resolution of 1280x800?