I start Xorg manually by typing "startx" at the terminal. I use this rarely, because I put the computer in sleep state often. Modeline did not helped. I'm correct if I try to use a sample modeline given in Xorg.*.log for 75hz refresh? I got the board recently, I never used blob and never will be. I also do not rely on Gallium 3D today, so I use safe environ now. I had some tests with newer nvidia board, with same result. All works OK except this terrible behaviour. The monitor is capable to use 80Ghz/75Hz refresh rate, I use(d) ati before, before it goes mad sometimes. The refresh rate picked up correctly on ati, I used this for years. I can boot up into framebuffer console with 75hz normally via video= kernel command line parameter. When startx, all drops down to 60hz, and can be only manually set up with xrandr. Sorry for incorrect English and thanks alot for your answer. <div class="gmail_quote">On Thu, Mar 10, 2011 at 2:27 AM, Emil Velikov <<a href="mailto:emil.velikov@yahoo.co.uk">emil.velikov@yahoo.co.uk</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hi Donald, See the comments inline<div class="im"> On Wed, 09 Mar 2011 05:38:55 -0000, Donald Jenkins <<a href="mailto:dj.jankins@gmail.com" target="_blank">dj.jankins@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hello. Having serious problems with all nvidia boards plugged on my PC, now on 8400GS. Xorg with 2D-only nouveau driver sets invalid preferred refresh rate 60hz on SAMTRON 73v, when 75hz needed. </blockquote> </div> How old is this monitor ? Did it work correctly using the blob/earlier nouveau ?<div class="im"> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> output of xrandr: Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192 DVI-I-1 disconnected (normal left inverted right x axis y axis) VGA-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm 1280x1024 60.0*+ 75.0 1152x864 75.0 1024x768 75.1 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 640x480 72.8 75.0 66.7 60.0 720x400 70.1 I can *manually* set correct refresh rate using xrandr -r 75 command (for example, in .xinitrc), but Xorg configuration don't recognize it at all. Some full screen software games reset refresh rate back to 60hz. How I can "hardcode" it in xorg.conf? I really stuck at this point. </blockquote> </div> You can find how to "hardcode" the timings/refresh rate, by googling for "xorg modeline". Note 1: The refresh rate change will take place AFTER Xorg is up (i.e. currently there is not way to set it at boot time). Note 2: The generated values may or may not work. What you can try is startup "Xorg --verbose 9" using the blob and it should print the refresh rate/timings used. Then you can add it to xorg.conf <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Thanks. </blockquote> P.S. Apologies for any typos Cheers </blockquote></div>