Change resolution on Lenovo B590 to 1600x900, Ubuntu 12.04LTS permenently?

Question

Using Lenovo B590 my max res in Displays is currently 1366x768. im trying to change it to 1600x900.

i tried following this guide: https://wiki.ubuntu.com/X/Config/Resolution#Adding_undetected_resolutions

but something goes wrong, first i did xrandr - this is my output:

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767 LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1366x768 60.0*+ 1360x768 59.8
60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis)
1600x900_60.00 (0xcc) 118.2MHz h: width 1600 start 1696 end 1856 total 2112 skew 0 clock 56.0KHz v: height 900 start 903 end 908 total 934 clock 59.9Hz

after that xrandr --output LVDS1 --mode 1600x900 told me it cannot find the mode so i tried adding it.

input cvt 1600 900 60 got:

1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
Modeline "1600x900_60.00"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync

now as par the guide i copied everything after Modline and put it in newmode like this:

xrandr --newmode "1600x900_60.00"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync

got this:

X Error of failed request:  BadName (named color or font does not exist)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  16 (RRCreateMode)
  Serial number of failed request:  29
  Current serial number in output stream:  29

and that is where im stuck because now

xrandr --addmode LVDS1 1600x900

still cannot find mod.

thank you

Answer 1

This is not much of an answer, but it can work (sometimes) - I have not tried this for a while...

Set it up so it is at the default 1366x768, then reboot.

Then at the login screen, enter tty - Ctrl+Alt+F2 - and login as your user via that.

Edit ~/.config/monitors.xml by running nano ~/.config/monitors.xml - edit this:

      <width>1366</width>
      <height>768</height>

to be:

      <width>1600</width>
      <height>900</height>

Press Ctrl+O then ↵, and then Ctrl+X to exit the editor.

You can then exit tty by running exit, and pressing Ctrl+Alt+F7

Login, it should work... ~/.config/monitors.xml seems to be where the Display settings saves configuration...