Hello. I don’t know if this is the place, but could someone help me with the monitor refresh rate using optimus e prime sync.
I have an Ubuntu Gnome 16.04.2 with Xorg 1.19.3 and Nvidia 375.66 driver.
My Nvidia card is working perfectly without tearing at 60 frames per second after doing some configuration learned here https://devtalk.nvidia.com/default/topic/957814/linux/prime-and-prime-synchronization/. Thanks for all the work to make this possible.
But I would like to set the refresh rate to 40hz because I have an old laptop that gets really hot trying to reach 60 fps in every game. In Windows, I play everything in 40 FPS and its ok and the laptop stays cool.
I have tried executing xrandr commands to set 40 hertz but it doesn’t have any effect. My xrandr command shows: “1366x768 60.07 + 40.05*” but it is not the reality.
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 16384 x 16384 LVDS-1-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm 1366x768 60.07 + 40.05* 1360x768 59.80 59.96 1024x768 60.04 60.00 960x720 60.00 928x696 60.05 896x672 60.01 960x600 60.00 960x540 59.99 800x600 60.00 60.32 56.25 840x525 60.01 59.88 800x512 60.17 700x525 59.98 640x512 60.02 720x450 59.89 640x480 60.00 59.94 680x384 59.80 59.96 576x432 60.06 512x384 60.00 400x300 60.32 56.34 320x240 60.05 1368x768_40.05 40.05 VGA-1-1 disconnected (normal left inverted right x axis y axis) HDMI-1-1 disconnected (normal left inverted right x axis y axis) DP-1-1 disconnected (normal left inverted right x axis y axis) 1368x768_40.05 (0x2e7) 54.140MHz -HSync +VSync h: width 1368 start 1408 end 1544 total 1720 skew 0 clock 31.48KHz v: height 768 start 769 end 772 total 786 clock 40.05Hz
I don’t have the option in nvidia-settings to change the refresh rate like someone without optimus would have.
My nvidia log is shown here:
nvidia-bug-report.log.gz (222 KB)