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ushabtay
Asked: 2012-08-04 08:12:53 +0800 CST

How to configure 1440x900 on two monitors in mirror displays?

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complex issue. i bought my Mom a new desktop pc, with specs listed below (using HardInfo 0.5.1):

  • Processor : 4x Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz
  • Memory : 3943MB (1228MB used)
  • Operating System : Ubuntu 12.04 LTS -Resolution : 1024x768 pixels -OpenGL Renderer : Mesa DRI Intel(R) Ivybridge Desktop
  • X11 Vendor : The X.Org Foundation
  • Genius Multimedia Keyboard
  • ImPS/2 Generic Wheel Mouse
  • Venus USB2.0 Camera

Two screens are connected - a 19" monitor through DVI, and a 26" HDTV through HDMI.

Displays Menu with TV

Ubuntu Displays shows that I can mirror displays with 1024x768 & 1440x900.

low res high res

Obviously I wanted the latter. Yet it doesn't work. 1024x768 does work, with no issues at all, but when i try to set the 1440x900 - the screens flicker, it take quite a while - and eventually doesn't work, as you can see here:

error 1 error 2

no only that - i must restart the computer since it becomes super slow, until i get a kernel panic. I sent the computer to the lab, and they claimed everything is ok with the hardware. They installed Windows 7 and showed me everything is fine, as seen here:

Windows 7 Display Menu

intel-graphics

2 Answers

  1. I have the same issue, and I still can not solve it, or can find anything helpful on how to fix. While reading online about it, I discovered that this is a bug. The problem arises when you try to do a multi-monitor setup with one monitor in a DVI port, and another in a HDMI. My suggestion is, do you have a VGA or DVI port on the HDTV. You could connect your HDTV with a VGA or DVI(DVI if you have two ports for it on your graphics card). This might work.

    Also, does this graphics card have a Nvidia Chip on it. If so, you might have The Nvida X Server Settings application on your computer. From there, you can enable Xinerama and also Twinview. There might even be an option there to mirror.

    I would give this issue some time, because eventually, it will be fixed, or a solution will be found.

    I hope this can help you.

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  2. Sorry I cannot check but for XFCE and LXDE I use next script:

         #/bin/bash
     xrandr   --newmode   "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083          1088 1120 -hsync +vsync
     xrandr --addmode HDMI1 "1920x1080_60.00"
     xrandr --output  HDMI1 --mode "1920x1080_60.00"
     xrandr --auto --output HDMI1 --left-of VGA1

    Via xrandr you can find your monitors and resolutions mode and configure Display positions.

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