merging and cleaning up

Linux/Disable KVM for VirtualBox.md

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+How can I disable the [[kvm]] Kernel in [[Linux]], so that I can launch a virtual machine in VirtualBox
+
+---
+When you run [[VirtualBox]] on a Linux host, it can conflict with the **KVM kernel modules** (`kvm` and `kvm_intel` or `kvm_amd`). VirtualBox doesn’t use KVM, and if those modules are loaded, they can prevent VirtualBox VMs from starting properly.
+
+To disable KVM, you can either **temporarily unload** the modules or **permanently blacklist** them.
+
+---
+
+### 🔹 Option 1: Temporarily Disable KVM
+
+Run the following commands (with root privileges):
+
+```bash
+sudo modprobe -r kvm_intel
+sudo modprobe -r kvm_amd
+sudo modprobe -r kvm
+```
+
+- If your CPU is Intel, unload `kvm_intel`.
+    
+- If your CPU is AMD, unload `kvm_amd`.
+    
+- Then unload the generic `kvm` module.
+    
+
+This will disable KVM until the next reboot.
+
+---
+
+### 🔹 Option 2: Permanently Disable KVM
+
+To prevent KVM from loading on boot, blacklist the modules:
+
+1. Create a blacklist file:
+    
+    ```bash
+    sudo nano /etc/modprobe.d/blacklist-kvm.conf
+    ```
+    
+2. Add these lines:
+    
+    ```
+    blacklist kvm
+    blacklist kvm_intel
+    blacklist kvm_amd
+    ```
+    
+3. Save and exit.
+    
+4. Update initramfs (on some distros, required):
+    
+    ```bash
+    sudo update-initramfs -u
+    ```
+    
+5. Reboot your system.
+    
+
+---
+
+### 🔹 Verify
+
+After reboot (or unloading), check that no KVM modules are loaded:
+
+```bash
+lsmod | grep kvm
+```
+
+If the output is empty, KVM is disabled and VirtualBox should work.
+
+---
+
+⚠️ **Note:** If you ever want to use QEMU/KVM again, you’ll need to remove those blacklist entries and reboot.
+
+Would you like me to also show you how to make VirtualBox auto-unload KVM just when you launch a VM (without disabling it system-wide)? That way, you can keep using both VirtualBox and KVM on the same system.