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How I can do to keep my 1440x900 74 mz configuration after reboot?

After configuring it in NVIDIA settings and reboot, it returns to previous 60 hz.

Thanks in advance for your help.

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Don't use sudo use gksuinstead. – Uri Herrera Jan 4 '12 at 5:11

Use gksu nvidia-settings as suggested in the comments

nvidia settings

Once you have adjusted your settings, click the "Save to X Configuration File" button. When asked if you wish to merge your changes, say no.

Make sure the "Merge with existing file" box is unselected.

ubuntu wiki

See for details.

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All is perfectly now, thank you very much for the help – Ricardo Suarez Lopez Jan 5 '12 at 16:46

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