added xorg nvidia error and standardized troubleshoot section

wiki/games/counter-strike_2.md

@@ -6,6 +6,8 @@ It is distributed via [Steam](./steam.md).
 
 ## Troubleshooting
 
+This section addresses various errors that can happen when playing Counter-Strike 2.
+
 ### Problems launching on [Steam](/wiki/games/steam.md)
 
 On [Linux](/wiki/linux.md) systems launching can run into problems.

wiki/games/lutris.md

@@ -138,8 +138,7 @@ Afterwards all networking of the selected game is disabled.
 
 ## Troubleshooting
 
-This section explains ways of solving various problems that can occur when using
-Lutris.
+This section addresses various errors that can happen when using Lutris.
 
 ### DX12/DX13 is not Supported on Your System
 

wiki/games/sid_meier's_civilization_vi.md

@@ -6,6 +6,8 @@ strategy [game](/wiki/games.md) which is available as a standalone Launcher for
 
 ## Troubleshooting
 
+This section addresses various errors that can happen when playing Sid Meier's Civilization VI.
+
 ### Problems launching with [Proton](./steam.md)
 
 Due to the standalone launcher of Civilization VI being used in the startup

wiki/linux/mkinitcpio.md

@@ -2,8 +2,28 @@
 
 `mkinitcpio` is a script to create an initial ramdisk environment.
 
+## Usage
+
+### Manually Generate Initial Ramdisk
+
+The following command will (re-)generate the initial ramdisk by a preset, which in this case is
+`linux`.
+
+```sh
+mkinitcpio -p linux
+```
+
+Usually this command is the only one needed.
+But it is also possible to (re-)generate all available presets with the following command.
+
+```sh
+mkinitcpio -P
+```
+
 ## Troubleshooting
 
+This section addresses various errors that can happen when using mkinitcpio.
+
 ### '/lib/modules/xxxxxxx' is not a valid kernel module directory
 
 When you encounter an error like the header of this section when running

wiki/linux/package_manager.md

@@ -17,8 +17,8 @@ It features the same syntax.
 
 ### Troubleshooting
 
-The following section describes problems that can arise when using pacman or
-yay.
+This section addresses various errors that can happen when using the package managers yay and
+pacman.
 
 #### Update Mirrorlist
 

wiki/linux/proxmox.md

@@ -86,6 +86,8 @@ your liking.
 
 ## Troubleshooting
 
+This section addresses various errors that can happen when using Proxmox.
+
 ### No internet after mainboard swap
 
 If you change the mainboard of your proxmox-virtual-environment it is possible,

wiki/linux/shntool.md

@@ -62,6 +62,8 @@ Afterwards `flacon` can be installed like a normal package.
 
 ## Troubleshooting
 
+This section addresses various errors that can happen when using shntool.
+
 ### Unable to Split Audio Files
 
 This error occurs when

wiki/linux/suckless.md

@@ -44,6 +44,8 @@ new `feature`
 
 ## Troubleshooting
 
+This section addresses various errors that can happen when using suckless programs.
+
 ### suckless program crashes or struggles with colored emojis
 
 Suckless programs  especially `st` and `dmenu` can not display colored

wiki/linux/x_window_system.md

@@ -139,3 +139,15 @@ Section "InputClass"
     Option "MiddleEmulation" "true"
 EndSection
 ```
+## Troubleshooting
+
+This section addresses various errors that can happen when using the X window system.
+
+### Error `Failed to initialize the NVIDIA kernel module`
+
+When starting up the X server the error message `Failed to initialize the NVIDIA kernel module` can
+appear.
+This usually means that either the [Nvidia](/wiki/nvidia.md) kernel module is not installed.
+This can be fixed by [installing Nvidia](/wiki/linux/nvidia.md#setup).
+If this is not the problem then the [initial ramdisk](/wiki/linux/mkinitcpio.md) should be
+[regenerated](/wiki/linux/mkinitcpio.md#manually-generate-initial-ramdisk).

wiki/wireguard.md

@@ -72,7 +72,7 @@ wireguard is closed.
 
 ## Troubleshooting
 
-This section addresses various errors and ways how to troubleshoot them.
+This section addresses various errors that can happen when using WireGuard.
 
 ### Unknown Device Type / Protocol Not Supported