In this video I cover how to change the vm.max_map.count value, a Linux kernel parameter, in order to prevent certain games from crashing whilst using compatibility layers such as Steam Proton. The vm.max_map.count value is responsible for controlling the maximum number of memory map areas that a process can have. Or in other words, prevent a single or group of processes from consuming excessive amounts of virtual memory that could lead to performance or system instability. Step 1. Changing The vm.max_map.count Value. To change the limit, it will differ slightly depending on your Linux distribution. For Ubuntu based distributions, you will need to amend the systctl.conf file located at. /etc/sysctl.conf This can be done with the following Terminal command. sudo nano /etc/sysctl.conf So, with the file open, simply scroll down to the bottom and add the following value. vm.max_map_count=2147483642 Once done, save the file and reboot the machine. Alternatively, for Arch based distributions, you will need to edit the 80-gamecompatibility.conf file, located at. /etc/sysctl.d/80-gamecompatibility.conf Again, this can be done using the following Terminal command. sudo nano /etc/sysctl.d/80-gamecompatibility.conf Once again, scroll down to the bottom and add the following value. vm.max_map_count=2147483642 Save the file when done, and reboot the machine to apply. Step 2. Checking The New vm.max_map.count Value. To check that the new value has been applied, simply run the following Terminal command. cat /proc/sys/vm/max_map_count Which should return 2147483642 All done. #proton #steam #linux Social Media Links Discord - https://discord.gg/3SxGk3WG2D Reddit - https://www.reddit.com/r/IntelligentGaming2020/