northernpaster.blogg.se - Switchresx app change 30hz to 60hz

#Switchresx app change 30hz to 60hz how to#
#Switchresx app change 30hz to 60hz code#

Seems to be missing some refresh rates for higher resolutions. Maybe there's bugs in CoreDisplay framework. I wonder if there's a limit to the number of resolutions? Did you scroll the entire list in Displays preferences to find another 2560x1440 mode? Maybe there's a problem with the sorting. Displays preferences shows some low resolution modes but SwitchResX is only showing HiDPI modes. SwitchResX seems to be missing some resolutions. Is there a difference between the two 60Hz options? SwitchResX shows all the 2560x1440 HiDPI resolutions (60Hz, 30Hz, 24Hz, 25Hz, 50Hz, 60Hz). The Current Resolutions list in SwitchResX might be easier to read if you sorted by Resolution instead of HiDPI.

#Switchresx app change 30hz to 60hz code#

It looks like the code that uses the new preference is in IOFBBuildModeList and IOFBInstallScaledMode of IOGraphicsLib.c (but the source code available on doesn't include these changes).

Is there some code that can allow multi refresh rates per scaled mode in earlier macOS version? For instance, Nvidia graphics cards newer than Kepler only work in High Sierra 10.13.x.

Which version of macOS between 10.14.3 and 10.14.6 introduced this new preference?.

How do you use the defaults command to modify /Library/Preferences instead of ~/Library/Preferences or /private/var/root/Library/Preferences?.

"multiRefreshRateScaledModes" works for all displays. The "appleMultiRefreshRateScaledModes" preference is applied only to Apple displays (vendor code 0x0610). It works! Now SwitchResX sees all the refresh rates of the base resolution for each scaled resolution and its corresponding HiDPI mode resolution. Sudo cp ~/Library/Preferences/ /Library/Preferencesand restarted. Using Hopper Disassembler, it's easy to see that they are used as preferences. I noticed a string "appleMultiRefreshRateScaledModes" and "multiRefreshRateScaledModes" in 10.14.6 (not in 10.14.3) for the CoreDisplay framework.

#Switchresx app change 30hz to 60hz how to#

The ability to run different refresh rates for a scaled mode is probably in the user code and should not depend on the individual graphics card drivers (those kernel drivers have the resolution and refresh rate that you want, you just need to find out how to get the user land code to use that for a HiDPI mode). Apple might have hidden some stuff in newer versions of those files, so also check older OS versions. These are user land code, not kernel code, so maybe they can be modified to do what you need. "tovr" is for adding "Standard resolutions".Ī lot of the code that uses those is in IOGraphicsLib.c and IODisplayLib.c at.

"IODisplayEDID" is for custom timings that don't go into "dspc". "DisplayProductName" is for custom product name option. "scale-resolutions" is for scaled custom resolutions. "DisplayPixelDimensions" is for the "Scaled resolutions base" option. "default-resolution" is for the "Startup resolution" option. Here's a list of the options that SwitchResX modifies: Strings /System/Library/Frameworks/amework/CoreDisplay Grep -R DisplayPixelDimensions /System/Library/Extensions /Library/Extensions /System/Library/Frameworks Building a CustoMac Hackintosh: Buyer's Guide