120Hz for Linux?

[Zshrc]

The new M1 Pro/Max devices include a 120Hz screen. It seems to be working well with Windows VMs, but has anyone gotten it working with Linux VMs?

 

[Zshrc]

Managed to figure it out in case anyone else was trying to...
This is a fullscreen VM on a 16 inch M1 Pro running Ubuntu 20.04 in Xorg. Also works in CentOS 9 Stream.
$ cvt 4112 2572 120
$ xrandr --newmode (everything after "Modeline" from above command)
$ xrandr --addmode Virtual-1 4112x2572_120.00
$ xrandr --output Virtual-1 --mode 4112x2572_120.00

 

[YousufS]

The 1st command worked for me but not the 2nd one. This was the output:

parallels@ubuntu-linux-20-04-desktop:~$ cvt 4112 2572 120
# 4112x2572 119.99 Hz (CVT) hsync: 330.80 kHz; pclk: 1916.00 MHz
Modeline "4112x2572_120.00" 1916.00 4112 4496 4952 5792 2572 2575 2585 2757 -hsync +vsync
parallels@ubuntu-linux-20-04-desktop:~$ xrandr --newmode
xrandr: failed to parse '(null)' as a mode specification
Try 'xrandr --help' for more information.
parallels@ubuntu-linux-20-04-desktop:~$

 

[JulianD5]

Here's a bash script to do it automatically

```
#!/bin/bash
# Usage: ./change_resolution.sh <width> <height> <refresh_rate>
# Example: ./change_resolution.sh 1800 1169 120

# Check if three arguments are provided
if [ "$#" -ne 3 ]; then
echo "Usage: $0 <width> <height> <refresh_rate>"
exit 1
fi

# Assign input parameters
width="$1"
height="$2"
refresh="$3"

# Run cvt to generate modeline information
cvt_output=$(cvt "$width" "$height" "$refresh")

# Extract the line containing "Modeline"
modeline_full=$(echo "$cvt_output" | grep "Modeline")

# Remove the word "Modeline" to get only the parameters
modeline=$(echo "$modeline_full" | sed 's/Modeline //')

# Extract the mode name (first token, removing quotes)
mode_name=$(echo "$modeline" | awk '{print $1}' | sed 's/"//g')

# Get the remaining parameters (everything after the mode name)
mode_params=$(echo "$modeline" | cut -d' ' -f2-)

# Create the new mode with xrandr using the mode name and parameters
xrandr --newmode "$mode_name" $mode_params

# Add the new mode to the output "Virtual-1"
xrandr --addmode Virtual-1 "$mode_name"

# Set the new mode on "Virtual-1"
xrandr --output Virtual-1 --mode "$mode_name"
```