I am trying to get a monitor work with my Ubuntu laptop. The monitor is this cheap 27" Korean monitors which has a 2560x1440 resolution -- and nothing else. Here are some specifications of this monitor:

• 2560x1440 @60Hz
• Only one dual link DVI-D input -- no other input port (no HDMI or display port)
• no OSD
• no scalar
• reports corrupt EDID
• does 2560x1440 @60Hz, did I say that already?

Anyways, the monitor works beautifully with my Ubuntu desktop which has an nVidia card with DVI output. However, I am having problem using this monitor with my laptop. After some searching around I found a few posts suggesting to use an active adaptor for mini display port, so I went and bought a mini display to dual link DVI-D adaptor.. When using this adaptor the monitor is recognized by nvidia-settings tool but with incorrect resolution information.

As you can see the monitor is incorrectly recognized and there are no other resolution available to set. This post on ubuntu forums and this other post on overclock both suggest that the monitor is reporting corrupt EDID file. I have tried following their instructions, but so far I have not been able to display any image on the monitor from my laptop.

The laptop I am using is an ASUS G75VW with a 1920x1080 screen. It has a VGA, an HDMI 1.4a, and a mini display port. The graphic card is an nvidia gforce gtx 660M with 2GB dedicated memory. I am running Ubuntu 12.10 on here which I upgrade from 12.04 a few weeks ago.

As I said I have tried several suggestions, including specifying Modeline in xorg.conf and also linking to EDID files I found from those forum posts above. However, I am not sure if the EDID files I found are suitable for my monitor. I think the solution to my problem consist of obtaining the EDID file of my monitor and then fixing it and modifying xorg.conf to force nvidia driver to load the correct resolution. However, I am not sure what steps I need to take to do this.

Here is the part of sudo xrandr --prop output that is related to this monitor:

DP-1 connected 800x600+1920+0 (normal left inverted right x axis y axis) 0mm x 0mm
    SignalFormat:   DisplayPort
    supported: DisplayPort 
    ConnectorType:  DisplayPort
    ConnectorNumber: 3 (0x00000003)
    _ConnectorLocation: 3 (0x00000003)
    800x600        60.3*+

I was expecting to see the EDID file in this output as was mentioned in this post, but it is not there.

After several hours of tweaking X configurations, I decided it was time to ask for help here. I would really appreciate if someone with experience regarding EDID and X configuration could give me a hand to solve this issue.