Update troubleshooting.mdx

src/content/docs/en/support/troubleshooting.mdx

@@ -46,6 +46,10 @@ just assign more resources (CPU, RAM, Swap space) to your system.
 
 ### Boot
 
+#### Login freeze at ISO Live boot
+
+By running ISO, at boot, if login prompt freezes, reboot and select the boot entry called **"Athena OS install medium (%ARCH%, UEFI, safe graphics, nomodeset)"**. The problem was caused by `nouveau.modeset=1` for some specific NVIDIA hardware.
+
 #### Error: file '/vmlinuz-linux-lts' not found
 
 If, after a system update, you get the following error at boot: