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I tried to remove using xrandr --rmmode or --delmode output name but it fails. How do i remove it then??

HDMI-1 connected 1280x720+0+0 (normal left inverted right x axis y axis) 160mm x 90mm
   1920x1080      60.0 +   50.0     30.0     25.0     24.0     25.0     30.0  
   1600x1200      60.0  
   1680x1050      59.9  
   1680x945       60.0  
   1400x1050      59.9  
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1280x960       60.0  
   1366x768       59.8  
   1360x768       60.0  
   1280x800       74.9     59.9  
   1152x864       75.0  
   1280x768       74.9     60.0  
   1280x720       50.0     60.0* 
   1440x576       25.0  
   1024x768       75.1     70.1     60.0  
   1440x480       30.0  
   1024x576       60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   720x576        50.0  
   848x480        60.0  
   720x480        59.9  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  


$ xrandr --delmode HDMI-1 1600x1200
X Error of failed request:  BadAccess (attempt to access private resource denied)
  Major opcode of failed request:  150 (RANDR)
  Minor opcode of failed request:  19 (RRDeleteOutputMode)
  Serial number of failed request:  27
  Current serial number in output stream:  28
share|improve this question
Have you tried with sudo? – Lucio Mar 7 at 2:02
@Lucio: yes still same – YumYumYum Mar 7 at 2:03
1  
"This problem is solved with latest ubuntu 11.04." What is your Ubuntu version? – darksky Mar 7 at 6:33

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