[SOLVED] KSP no longer starts after music set to 0

[Noumex]

KSP Version: no longer work, I can't check version on splash screen but it's always updated by Steam and the buildID.txt is

build id = 01289
2016-06-21_20-12-27
Branch: master

What happen:
I was playing all week nights, with a few random crashes but I'm not complaining on those, game was mostly running fine and then...
- I paused the game while on rescue operation in orbit
- Since music still plays after Alt-Tab to read docs on the web, I decided to set music volume to 0...
Escape-> Settings -> Music volume 0 -> Apply
After that no more music but the window app game is frozen and then gone...
And I can NO LONGER START THE GAME in anyway. Tried after rebooting PC, nothing happen when I start the game from Steam.

No splash screen, nothing.
It was (mostly) fine before that setting change, I could play for hours.

No mods, no add-on, Steam verified install

Step to replicate: see description of what happened, but I'm enable to try to replicate: it no longer start.

Last lines of KSP.log:

[LOG 21:50:31.995] Game Paused!
[LOG 21:50:45.826] Launcher start settings screen: False
[LOG 21:51:10.296] Launcher here(in write): False
[LOG 21:51:10.372] [MessageSystem] Reposition 12.0902 228753
[LOG 21:51:10.372] [GenericAppFrame] Reposition 12.0902 228753
[LOG 21:51:10.372] [GenericAppFrame] Reposition 12.0902 228753
[LOG 21:51:10.373] [GenericAppFrame] Reposition 12.0902 228753
[EXC 22:09:35.566] DllNotFoundException: CSteamworks
        Steamworks.InteropHelp.TestIfAvailableClient ()
        Steamworks.SteamController.Shutdown ()
        SteamController.KSPSteamController.OnDestroy ()
        SteamController.KSPSteamController.OnApplicationQuit ()

Start by command line:

user@mypc:/data/Steam/steamapps/common/Kerbal Space Program > LANC=C ./KSP.x86_64
Set current directory to /data/Steam/steamapps/common/Kerbal Space Program
Found path: /data/Steam/steamapps/common/Kerbal Space Program/KSP.x86_64
Mono path[0] = '/data/Steam/steamapps/common/Kerbal Space Program/KSP_Data/Managed'
Mono path[1] = '/data/Steam/steamapps/common/Kerbal Space Program/KSP_Data/Mono'
Mono config path = '/data/Steam/steamapps/common/Kerbal Space Program/KSP_Data/Mono/etc'
displaymanager : xrandr version warning. 1.4
client has 4 screens
displaymanager screen (0)(DP-0): 1920 x 1200
Using libudev for joystick management


Importing game controller configs

And that's all. Nothing happen after.

My system:

PC Intel x86_64 + NVidia, Linux Mint KDE 17.3 64, 8GB RAM, French locale. Classic keyboard and mouse, no fancy controller or joypad. One screen attached to the graphic card.

Steam games in custom directory, no problem before and no problem to start other Steam games. Lots of space on disk.

My attempts:

I edited settings.cfg to set back music to more than 0 (0.3), and I also put back Full screen and resolution that wasn't correct (that's strange). I have a copy of the unedited file.

I changed Steam KSP startup option as suggested: LC_ALL=C %command%_64

My question / request:

I would be very grateful to anyone would could help me or point me toward a bug solving process, but right now I can't even find a clue

EDIT: looking into that thread that look promising...

EDIT 2: SOLVED! (workaround)

Just delete or rename that file: ~/.config/unity3d/Squad/Kerbal Space Program/prefs

Here is the offending prefs file content, a bug in KSP has written crazy resolution:

<unity_prefs version_major="1" version_minor="1">
        <pref name="Screenmanager Is Fullscreen mode" type="int">0</pref>
        <pref name="Screenmanager Resolution Height" type="int">23</pref>
        <pref name="Screenmanager Resolution Width" type="int">1</pref>
        <pref name="UnityGraphicsQuality" type="int">5</pref>
        <pref name="UnitySelectMonitor" type="int">-1</pref>
</unity_prefs>

 

Edited September 17, 2016 by Noumex
found a solution, but for sure there's a bug