I have 11.10 running on a system76 laptop. without the proprietary driver i was able to set up a second monitor (samsung 19") with extended display.
when i activate the proprietary driver, the only display setting that works is "mirror". when i pick to extend the display at the proper resolution (1280:1084, samsung) (1600:900, laptop) for each screen I get the following:
required virtual size does not fit available size: requested=(2880, 1024), minimum=(320, 200), maximum=(1600, 1600).
when i try to execute the resolutions that are set at default, after unchecking the "mirror screens" button (1152:864, samsung) (1600:900, laptop) i get the following:
requested position/size for CRTC 148 is outside the allowed limit: position=(1152, 0), size=(1152, 864), maximum=(1600, 1600)