Custom Resolution Utility (CRU)

[Nintendo Maniac 64]

Just a quick question - how may I re-create Linux xrandr custom resolutions/refresh rates exactly-as in in CRU, such as the following custom 50Hz refresh?:

Code:

xrandr --newmode "1280x1024_49.99"  88.50  1280 1368 1496 1665  1024 1027 1034 1063 -hsync +vsync

I ask because using the various parameters within CRU itself to create a custom 50Hz refresh does indeed result in my monitor showing an image, and its OSD similarly confirms that it's running at 50Hz, but it also throws up an "out of range" message in the middle of the screen and then after a couple seconds puts the monitor into standby until I revert back to 60Hz or 75Hz. This seems to occur no matter what refresh or settings I use within CRU unless the refresh rate was 60Hz or 75Hz - a limitation I wasn't having with xrandr.

The xrandr mode by comparison didn't throw up any such "out of range" message on my monitor whether it was 50Hz, 72Hz, etc, and I was able to similarly confirm that it was in fact displaying true 50Hz without any tearing or judder caused by frame-dropping or doubling.

For reference, using the custom resolution settings in the Intel control panel gives the same results as CRU except with far fewer parameters to customize.