Red orchestra ostfront, game can't open in a window

[keq-1]

• Steam client version (build number or date): 7 june 2022
• Distribution (e.g. Ubuntu): Linux Mint 19.3 Tricia
• Opted into Steam client beta?: No ?
• Have you checked for system updates?: Yes

I want to open Red Orchestra Ostfront 41-45. It seems that the game launches and it's written "opened" in steam (in green letters), but no window opens at all.

Here is a copy of my RedOrchestra.log :

Log: Log file open, Mon Jun 13 14:54:30 2022
Init: Name subsystem initialized
Init: Version: 3339 (128.29)
Init: Compiled: Oct 29 2012 10:22:31
Init: Command line: 
Init: (This is Linux patch version 3339.0)
Init: Character set: Unicode
Init: Base directory: /home/lionel/.steam/steam/steamapps/common/Red Orchestra/System/
Init: Ini:RedOrchestra.ini   UserIni:User.ini
Init: Build label:  Build RedOrchestra_Build_[2005-11-27_10.48]
Init: Object subsystem initialized
Warning: Missing Class Class Editor.TransBuffer
Warning: Failed to load 'PixoDrv': Can't find file for package 'PixoDrv'
Warning: Failed to load 'Class PixoDrv.PixoRenderDevice': Can't find file for package 'PixoDrv'
Warning: Can't find file for package 'PixoDrv'
Critical: Can't find file for package 'PixoDrv'
Exit: Executing UObject::StaticShutdownAfterError
Exit: Executing USDLClient::ShutdownAfterError
Exit: Exiting.
Log: FileManager: Reading 0 GByte 96 MByte 175 KByte 542 Bytes from HD took 4.471018 seconds (1.994402 reading, 2.476616 seeking).
Log: FileManager: 0.000000 seconds spent with misc. duties
Uninitialized: Name subsystem shut down
Uninitialized: Log file closed, Mon Jun 13 14:54:44 2022

[kisak-valve]

Hello @keq-1, this issue should be mentioned to the game's dev(s).

Maybe check if https://steamcommunity.com/app/1200/discussions/0/558754899190050155/ is relevant?

[keq-1]

Hello @kisak-valve

Thank you, the link you provided solved my issue. It was because I changed Open GL to Direct3D in game's options...