Added automated script to switch to old touchbar driver (#553)

Author: angelobdev

docs/guides/postinstall.md

@@ -142,6 +142,125 @@ blacklist cdc_mbim" >> /etc/modprobe.d/blacklist.conf'
 
 Please note that this internal ethernet interface is required for various services including touchid that there currently is no Linux support for. In the future, if any of these services are supported, you'll need to undo this.
 
+# How to use old touchbar driver
+
+Some users want to use `apple-touchbar` driver instead of `tiny-dfr`, here's how to do so:
+
+1. Create and edit the script file: `switch-touchbar-drv.sh`
+
+2. Paste this content:
+
+    ```bash
+    #!/bin/bash
+    
+    # Switching to root
+    sudo $0
+    
+    if [ "$EUID" -ne 0 ]; then
+        exit 1
+    fi
+    
+    # Detecting Package Manager
+    PM_INSTALL=""
+    PM_REMOVE="null"
+    
+    if apt --help >/dev/null 2>&1; then
+        echo "Debian-based OS are not supported!"
+        echo "Please use 'sudo touchbar --switch' instead."
+        exit 1
+    elif dnf >/dev/null 2>&1; then
+        echo "Fedora-based OS are not supported!"
+        exit 1
+    elif pacman -h >/dev/null 2>&1; then
+        PM_INSTALL="pacman -Sy"
+        PM_REMOVE="pacman -Rnsu"
+    else
+        echo "No valid package manager has been found!"
+        exit 1
+    fi
+    
+    # Checking dependencies
+    echo "Cheking dependencies..."
+    
+    if ! command -v git &>/dev/null; then # GIT
+        echo "git could not be found! Installing..."
+        $PM_INSTALL git
+    fi
+    
+    if ! command -v dkms &>/dev/null; then # DKMS
+        echo "dkms could not be found! Installing..."
+        $PM_INSTALL dkms
+    fi
+    
+    # SWITCH TO OLD DRIVER
+    if [[ "$1" == "--old" ]]; then
+    
+        # Switching to old driver
+        echo "Switching to old driver..."
+    
+        # Removing tiny-dfr
+        $PM_REMOVE tiny-dfr
+    
+        # Blacklisting new driver
+        echo "Blacklisting new touchbar driver..."
+    
+        cat <<- EOF > /etc/modprobe.d/touchbar.conf
+        # Disable new Apple Touchbar driver
+        blacklist appletbdrm
+        blacklist hid_appletb_kbd
+        blacklist hid_appletb_bl
+        EOF
+    
+        # Installing old driver
+        echo "Cloning driver repo..."
+        git clone https://github.com/AdityaGarg8/apple-touchbar-drv /usr/src/apple-touchbar-0.1
+        dkms install -m apple-touchbar -v 0.1
+    
+    # SWITCH TO NEW DRIVER
+    elif [[ "$1" == "--new" ]]; then
+    
+        # Switching to new driver
+        echo "Switching to new driver..."
+    
+        # Installing tiny-dfr
+        $PM_INSTALL tiny-dfr
+    
+        # Removing blacklist conf
+        rm /etc/modprobe.d/touchbar.conf
+    
+        # Removing old driver
+        dkms unbuild -m apple-touchbar -v 0.1 -k all
+        rm -r /usr/src/apple-touchbar-0.1
+    
+    else
+    
+        echo "Choose a valid option:"
+        echo "--new (Switches to the new driver)"
+        echo "--old (Switches to the old driver)"
+        exit 1
+    
+    fi
+    
+    # DONE!
+    echo "All done! You can now reboot..."
+    read -p "Do you want to reboot now? [y/N]" -n 1 -r -s
+    echo
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        echo "Rebooting..."
+        reboot
+    fi
+    ```
+
+3. Make the script executable: `chmod +x switch-touchbar-drv.sh`
+
+4. Run the script `./switch-touchbar-drv.sh --old`
+
+!!! note
+    If you are on a Debian-based distro (e.g Ubuntu) just run `sudo touchbar --switch`
+
+!!! note
+    If you want to revert changes run `./switch-touchbar-drv.sh --new`
+
 # Suspend Workaround
 
 S3 suspend has been broken since macOS Sonoma, it has never been fixed, but this workaround will make deep suspend work: