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I have a laptop (Acer Aspire 8730G) which runs a GeForce 9300M GS. Its native resolution is 1680x945 pixels. Now, I connected my monitor to it (LG E2250V-PN) with VGA (laptop only has a VGA or HDMI input but I do not own a HDMI cable) and set the lay-out to "extend". Everything works as it should, but:

My LG monitor cannot receive its native resolutions. When going to the Screen Resolutions options of Windows I can choose between these values:

Windows Screen resolution options

NVidia control panel shows me this (running latest drivers 310.70 on Windows 8):

NVIDIA control panel

I know I can add a 'custom resolution' but I have no idea what to put into these fields ("Timing"):

Custom resolution

Any tips?

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what is the connection type: VGA, DVI, HDMI? – logoff Dec 28 '12 at 13:39
@logoff Right, I forgot that! Added: with VGA (laptop only has a VGA or HDMI input but I do not own a HDMI cable) – Bram Vanroy Dec 28 '12 at 13:41

2 Answers 2

Try to press Win+P to swap between dual monitor modes to extend your desktop. Maybe you are trying cloning both monitors. if it doesn't work, maybe your nVidia card is not detecting native resolutions of the external monitor.

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Unfortunately I already tried this, and it does not work. – Bram Vanroy Dec 28 '12 at 13:51
it seems your graphics nvida card cannot detect native resolutions of your external monitor. – logoff Dec 28 '12 at 14:01
Cf. my own answer. – Bram Vanroy Dec 28 '12 at 14:13
up vote 1 down vote accepted

Okay, I solved it!

Go to your NVidia Control Panel and add a Custom Resolution.

Fill in your resolution (1920 and 1080 in my case) and then under the heading "Timing" choose GTF (Generalized Timing Formula). For more information on advanced timings, see NVIDIA's website.

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