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Dota 2 causes the system to freeze requiring restart #1616
Your system information
Please describe your issue in as much detail as possible:
Sometimes while playing all of a sudden, the game freezes the entire system. No keystrokes are responded to. No mouse movement. The system has to be restarted.
There is a few things you can try to recover an error message.
Option 1: Enable magic syskeys until reboot by running sysctl kernel.sysrq kernel.sysrq=1 as root. Now if the system freezes you still have a way of communicating with the kernel. Of special interest here is alt+sysrq+r to regain control over the keyboard, which should allow changing to another tty or alt+sysrq+k which kills everything on the current one.
Option 2: If you have access to another linux computer you can also ssh into your machine used for playing dota2 and check dmesg there.
Option 3: On systemd based distributions you can enable a persistent journald log (which includes kernel log) by creating the /var/log/journal directory and running systemd-tmpfiles --create --prefix /var/log/journal as root. Afterwards reboot (I don't recommend restarting journald) and then after the next crash/reboot check journal with journalctl -b -1 -e again as root.
I actually started getting freezes on