Add Potential Errors Section to Updating Firmware

src/docs/firmware/updating-firmware.md

@@ -5,13 +5,28 @@ The script does not work on Windows. If you are using Windows, boot a live Linux
 :::
 
 ::: tip
-curl is not installed by default for Ubuntu / Ubuntu distros. To install it, run: `sudo apt update && sudo apt install -y curl`
+curl is not installed by default for Ubuntu or Ubuntu-based distros. To install it, run: `sudo apt update && sudo apt install -y curl`
 :::
-   
+
 1. Run [MrChromebox's Firmware Utility Script](https://mrchromebox.tech/#fwscript).
-   * In case you forgot, type `cd; curl -LO mrchromebox.tech/firmware-util.sh && sudo bash firmware-util.sh` and press Enter.
+   - In case you forgot, type `cd; curl -LO mrchromebox.tech/firmware-util.sh && sudo bash firmware-util.sh` and press Enter.
 2. Choose option 1: `Install/Update UEFI (Full ROM) Firmware`, and reboot if successful.
 
 ::: danger
 **Do not reboot if flash was not successful**
 :::
+
+### Potential Errors (Before Flashing)
+
+If you get any of the errors found below please try some of these fixes
+
+1. `/dev/mem mmap failed: Operation not permitted
+FAILED!
+FATAL ERROR!`
+   - If you get this error in a Full Linux Install **AND** is using GRUB follow the steps below
+     1. `sudo nano /etc/default/grub` (You can use any text editor)
+     2. add `iomem=relaxed` to `GRUB_CMDLINE_LINUX` (Most likely at the top of the config)
+     3. `grub-mkconfig -o /boot/grub/grub.cfg`
+     4. Reboot and rerun the firmware-utility script
+   - If you are not using GRUB, please refer to (Arch Wiki)[wiki.archlinux.org/title/Kernel_parameters], for instructions on how to add `iomem=relaxed` to your respective kernel parameter
+   - If you get this error in a Live Linux ISO, please reflash with another Distro