Screen size problems when mirroring laptop to a Tv using HDMI

The basic problem is that the virtual Tv screen is bigger than the actual Tv screen resulting in the panel, task-bar and other useful bits not being visible or clickable on the Tv. My distro is Xenial Xerus with dual Intel/Nvdia proprietary drivers. Currently, I am using the Intel driver, but I have unsuccessfully tried to get it working with Nvidia.

For reference, here is the xrandr ouptut

Code:

memyself@Mine:~$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
   1920x1080     60.02*+  59.93  
   1680x1050     59.95    59.88  
   1600x1024     60.17  
   1400x1050     59.98  
   1600x900      60.00  
   1280x1024     60.02  
   1440x900      59.89  
   1280x960      60.00  
   1368x768      60.00  
   1360x768      59.80    59.96  
   1152x864      60.00  
   1280x720      60.00  
   1024x768      60.00  
   1024x576      60.00  
   960x540       60.00  
   800x600       60.32    56.25  
   864x486       60.00  
   640x480       59.94  
   720x405       60.00  
   640x360       60.00  
HDMI1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 16mm x 9mm
   1920x1080i    60.00*+  50.00    59.94  
   1920x1080     24.00    23.98  
   1280x720      60.00    50.00    59.94  
   1024x768      75.08    70.07    60.00  
   1440x480i     59.94  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x576i      50.00  
   720x480       60.00    59.94  
   720x480i      60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   2152x1210_60.00  59.95  
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

I know its fairly common problem that has been asked before, but the most relevant solution dates back to 2011 and the linked Nvidia tutorial is appears to be dead, (or at least leads to a blank page.)

Since using a lower resolution on HDMI1 makes the problem worse, I have been trying to set up a higher custom resolution using this post as a guide. The steps were as follows:

Code:

# Get modeline
memyself@Mine:~$ cvt 2151 1210 60
# 2152x1210 59.95 Hz (CVT) hsync: 75.24 kHz; pclk: 218.50 MHz
Modeline "2152x1210_60.00"  218.50  2152 2304 2528 2904  1210 1213 1223 1255 -hsync +vsync
#
memyself@Mine:~$ xrandr --newmode "2152x1210_60.00"  218.50  2152 2304 2528 2904  1210 1213 1223 1255 -hsync +vsync
#
memyself@Mine:~$ xrandr --addmode HDMI1 2152x1210_60.00

This seems to be showing promise. At first the refresh rate was way to high, but when cutting it back to 30Hz I was able to see a flickering panel and task-bar, In other-words, the height seems to be very close, but the refresh-rate and width are still way off.

Am I on the right track, and if so, does anybody have any idea for the correct values of width, height and refresh-rate?

Thanks in advance

Irvine

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Screen size problems when mirroring laptop to a Tv using HDMI