protonscr

The Steam Linux Native Vulkan ver. of Deus Ex: Mankind Divided fails to launch

steamclosed
ValveSoftware/steam-for-linux#12686 · opened 2026-01-29 by ghoultek · updated 2026-01-31 · 2 comments · github
Gghoultek 2026-01-29 github

Steam Ticket ID = HT-52V5-FTBC-X59F

System information:
CPU = Ryzen7-3700x
RAM = 32GB
Motherboard = Asus ROG Crosshair VII Hero WiFi-AC
GPU = AMD RX 6800 XT (Asus TUF Gaming RX 6800 XT OC)
Display = Viewsonic XG2401 (24inch TN panel)
Drive = Samsung SATA-6 SSD 850 EVO 500GB
Partitions:

  • /boot/efi (FAT32, 1000mb, grub)
  • manjaro root (ext4, 120 GB)
  • /home (ext4, 120 GB)
  • /mnt/mydata_local/linux_gaming (ext4, 224.78 GB)

Steam system information gist = https://gist.github.com/ghoultek/d069dd503ee1f0627f38b504dfeb2531

  • Steam client version (build number or date): 1769025840
  • Distribution (e.g. Ubuntu): Manjaro KDE v26.0.1 (fresh install, all updates applied, nothing exotic installed)
  • kernel version : 6.18.4-1-MANJARO
  • Opted into Steam client beta?: No
  • Have you checked for system updates?: Yes (all installed)
  • Steam Logs: see the steam logs attached as well as the output from the terminal
  • GPU: AMD RX 6800 XT (Asus TUF Gaming RX 6800 XT OC)

Problem Description:
On a fresh install of Manjaro KDE, with all updates installed, after a cold boot, with no extra programs running, I'm unable to launch Steam and play the Linux native Vulkan version of Deus Ex: Mankind Divided. The Steam Linux Native Vulkan version of Deus Ex: Mankind Divided fails to launch the game. When I click the play button, it does play > stop > play with only a few seconds between the button states. There are no error messages. I expected Steam to launch the Feral Interactive pre-launch window, where I can choose the parameters that are fed to the actual game. The pre-launch window is never displayed. The compatibility module is set to the Steam Linux Runtime (scout) 1.0. Cloud saves are disabled. I tried switching between:

  • Steam Linux Runtime (scout) 1.0
  • Legacy runtime
  • Proton Experimental
  • GE-Proton-29

With GE-Proton-29 the game is re-downloaded as a windows install and launches via proton. The game works via proton but I specifically purchased this game because it has a Linux Native Vulkan version, which gives slightly higher FPS performance over Proton and Windows. The other compatibility modules produce the same play > stop > play behavior, with only a few seconds between the button states.

I'm encountering similar behavior with Shadow of Mordor and DOTA 2. I will create separate issues for these 2 games. The attached command line output contains output from attempting to run all 3 games as Linux Native installs.

manjaro_steam_command_line_output_v1_2026-1-29.txt
steam-logs.tar.gz

Kkisak-valve maintainer 2026-01-29 github

Hello @ghoultek, this issue is already being tracked at https://github.com/ValveSoftware/steam-runtime/issues/613. Closing as a duplicate.

Bbolokanar 2026-01-30 github

@ghoultek Please try this and report: https://github.com/FeralInteractive/ferallinuxscripts/issues/3#issuecomment-3733451041

From the above

Add this in DeusExMD.sh

# ====================================================================
# Ensure the ld library seach path works for multilib
# glibc 2.26 briefly had an issue here
# x86_64 or i686
LD_LIBRARY_PATH="${GAMEROOT}/lib/x86_64:${LD_LIBRARY_PATH}"

Just above:

# ====================================================================
# Run the game
cd "${GAMEROOT}/bin" && ${GAME_LAUNCH_PREFIX} "${GAMEROOT}/bin/${FERAL_GAME_NAME}" "$@"
RESULT=$?

Proton versions

Upstream links