Can't connect to Dota2 network, always in offline mode

[mhsabbagh]

Ubuntu 19.04 amd64, on Leonovo ThinkPad x260.

• System information from steam (Steam -> Help -> System Information) in a gist: https://gist.github.com/mhsabbagh/3638ba0ff78e2204f7a3482c9de53aef
• 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:

Dota2 is unable to connect to the Dota2 network. When I open the game, it shows "Searching for the dota2 game coordinator" for a while, and then goes to "Offline Mode" in red. Can't even see the list of custom games, games to watch.. And of course, can't play any game at all.

After something like 5 minutes, it changes the message to "Restoring connection to the dota 2
game coordinator".

This has been going for more than a week now. I am connecting from Turkey.

Got a different Mesa version, reinstalled everything.. Still the same.

Steps for reproducing this issue:

1. Install Dota2 on Ubuntu 19.04.
2. Check if after launch you can play the game normally or not.