Only one instance of the game can be running at one time

[r3pek]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist: https://gist.github.com/r3pek/df8621bb7da905d2b8207a7f8a5eaaa9
• Have you checked for system updates?: Yes
• Are you using the latest stable video driver available for your system? Yes
• Have you verified the game files?: Yes

Please describe your issue in as much detail as possible:

When running Dota on a multiuser system, if another user has run it at least once, other users aren't able to run Dota with the error: "Only one instance of the game can be running at one time". Dota is closed and not running on all other accounts.

Steps for reproducing this issue:

1. Login with user1 and open Steam and launch Dota
2. Exit dota2
3. Logoff/Switch user to user2
4. Open steam and try to launch Dota

The issue is fixed by deleting /tmp/source_engine_*.lock file(s).

[fomich-artem]

I have the same trouble. Lock files should be removed after program that was created them has been closed. Please fix this.

[Turmfalke2]

lock files should be per user.

[jfdsmit]

Also ran into this