Linux, can't launch game - Unity bug

[dpanter]

When trying to start the game, Steam says 'Running' then 'Syncing' then nothing.
Launching from command line gives the cryptic message "Player is already running" then nothing.
Unity wrongly detects something using Chromium or related parts as a session of Unity already running, so it quits rather than starting another session.

Apparently this is a known bug in older Unity versions. The fix? Read below:

Originally posted by karl_jones:

I have spoken to our Linux team and they say this issue is fixed.
Those games that are affected by this issue need to upgrade to a version that has the fix, its not something we can do from our end.Unfortunately you would need to speak to each of them and ask that they upgrade.

Originally posted by Tak:

To add more detail, the fix landed in Unity 5.4.0.
The bug only manifests in games that use the "single instance" option - another alternative for gamedevs that don't want to upgrade could be to disable that option for their Linux builds.

https://forum.unity.com/threads/bug-in-unity-when-running-chrome-on-linux.441253/


Please help us poor Linux gamers play this awesome game!

[☭ REVOLUTIONARY TOAST ADDICT]

That's strange, it works great for me on Mint 19.

[dpanter]

Well, still doesn't work here.
Maybe you don't have anything running that Unity detects as another Chromium instance... /shrug
Would be nice if they could address this known bug anyway.

Console output:

/mnt/2TiB2/Steam/steamapps/common/Slain!$ ./Slain.x86_64 
Set current directory to /mnt/2TiB2/Steam/steamapps/common/Slain!
Found path: /mnt/2TiB2/Steam/steamapps/common/Slain!/Slain.x86_64
Mono path[0] = '/mnt/2TiB2/Steam/steamapps/common/Slain!/Slain_Data/Managed'
Mono path[1] = '/mnt/2TiB2/Steam/steamapps/common/Slain!/Slain_Data/Mono'
Mono config path = '/mnt/2TiB2/Steam/steamapps/common/Slain!/Slain_Data/Mono/etc'
displaymanager : xrandr version warning. 1.5
client has 4 screens
displaymanager screen (0)(DP-0): 3440 x 1440
displaymanager screen (1)(HDMI-0): 1080 x 1920
Using libudev for joystick management


Importing game controller configs
Found /dev/input/event8
Mapping raw axis 0 to 0
Mapping raw axis 1 to 1
Mapping raw axis 2 to 2
Mapping raw axis 3 to 3
Mapping raw axis 4 to 4
Mapping raw axis 5 to 5
Logitech Gamepad F710: Mapping b0.0 to b0
Logitech Gamepad F710: Mapping b1.0 to b1
Logitech Gamepad F710: Mapping b6.0 to b6
Logitech Gamepad F710: Mapping h0.4 to a7
Logitech Gamepad F710: Mapping h0.8 to a6
Logitech Gamepad F710: Mapping h0.2 to a6
Logitech Gamepad F710: Mapping h0.1 to a7
Logitech Gamepad F710: Mapping b8.0 to b8
Logitech Gamepad F710: Mapping b4.0 to b4
Logitech Gamepad F710: Mapping b9.0 to b9
Logitech Gamepad F710: Mapping a2.0 to a2
Logitech Gamepad F710: Mapping a0.0 to a0
Logitech Gamepad F710: Mapping a1.0 to a1
Logitech Gamepad F710: Mapping b5.0 to b5
Logitech Gamepad F710: Mapping b10.0 to b10
Logitech Gamepad F710: Mapping a5.0 to a5
Logitech Gamepad F710: Mapping a3.0 to a3
Logitech Gamepad F710: Mapping a4.0 to a4
Logitech Gamepad F710: Mapping b7.0 to b7
Logitech Gamepad F710: Mapping b2.0 to b2
Logitech Gamepad F710: Mapping b3.0 to b3
Assigning joystick 1
Player is already running
 
(Filename:  Line: 461)

[dpanter]

Update: Development beta works for me.

[☭ REVOLUTIONARY TOAST ADDICT]

You installed the development beta and that helped?

EDIT: I recreated the bug trying to launch the game with a chromium window open, as well as discord. The game refuses to launch with any instance of a chromium browser running.

[dpanter]

Originally posted by FEELDS OF BOO ᕕ( ᐛ )ᕗ:

You installed the development beta and that helped?

Yarp.

The game refuses to launch with any instance of a chromium browser running.

Also yarp, although it doesn't have to actually be Chromium as we would think of it. For instance, the Steam client also uses Chromium.
See here: https://en.wikipedia.org/wiki/Chromium_Embedded_Framework#Applications_using_CEF

Some specific versions of Unity are just borked this way, guess they used another version for the dev beta build. I wouldn't necessarily call the fix "simple" but it seems to me like it would be doable without too much effort to just rebuild towards a fixed Unity version.

[dpanter]

Reporting back in 2019, game runs perfectly in Debian sid with Logitech F710 gamepad.
Small detail, game doesn't support ultrawide resolutions so it will stretch in fullscreen. Playing windowed instead.