CS2 Arch Linux crashes repeatedly with SIGSEGV in librendersystemvulkan.so

[Duszkek]

Bascially randomly while playing the game, it might just freeze it and thats it. Happens to me like 1 per 2-4 games.
From core dump:

           UID: 1000 (duszke)
           GID: 1000 (duszke)
        Signal: 11 (SEGV)
     Timestamp: Mon 2025-11-17 23:30:40 CET (12min ago)
  Command Line: $'/mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/bin/linuxsteamrt64/cs2' -steam
    Executable: /mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/bin/linuxsteamrt64/cs2
 Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-steam@92588e4cfc43483e84259d50dab1af03.service
          Unit: user@1000.service
     User Unit: app-steam@92588e4cfc43483e84259d50dab1af03.service
         Slice: user-1000.slice
     Owner UID: 1000 (duszke)
       Boot ID: 412d90523f7148b6be9218a9da599185
    Machine ID: 467598a6c00845f7ab83a037da96b96c
      Hostname: duszke
       Storage: /var/lib/systemd/coredump/core.cs2.1000.412d90523f7148b6be9218a9da599185.38175.1763418640000000.zst (present)
  Size on Disk: 862.5M
       Message: Process 38175 (cs2) of user 1000 dumped core.
                
                Stack trace of thread 38218:
                #0  0x00007f6d5aad02b3 n/a (librendersystemvulkan.so + 0x4d02b3)
                #1  0x00007f6d5aad8b96 n/a (librendersystemvulkan.so + 0x4d8b96)
                #2  0x00007f6d5a965420 n/a (librendersystemvulkan.so + 0x365420)
                #3  0x00007f6d92ac4b9e _ZN7CThread10ThreadProcEPv (libtier0.so + 0x2c4b9e)
                #4  0x00007f6d92ac052b n/a (libtier0.so + 0x2c052b)
                #5  0x00007f6d9489698b n/a (/run/host/usr/lib/libc.so.6 + 0x9698b)
                #6  0x00007f6d9491a9cc n/a (/run/host/usr/lib/libc.so.6 + 0x11a9cc)
                ELF object binary architecture: AMD x86-64

GPU Drivers: OpenGL version string: 4.6 (Compatibility Profile) Mesa 25.2.7-arch1.1
Kernel: 6.12.58-1-lts
CPU: R9 9900X
GPU: RX 9070 XT

pacman version of steam, ill try with flatpak one but it should work

also for journalctl:

Nov 17 23:15:04 duszke plasmashell[1334]: Failed to find service for Unity Launcher "cs2.desktop"
Nov 17 23:15:04 duszke plasmashell[1334]: Failed to find service for Unity Launcher "cs2.desktop"
Nov 17 23:15:05 duszke steam[1804]: Loaded /mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/bin/linuxsteamrt64/libvphysics2.so, got 0x61107c5b70b0
Nov 17 23:30:40 duszke systemd-coredump[40085]: Process 38175 (cs2) of user 1000 terminated abnormally with signal 11/SEGV, processing...
Nov 17 23:30:49 duszke systemd-coredump[40087]: Process 38175 (cs2) of user 1000 dumped core.
Nov 17 23:30:49 duszke drkonqi-coredump-processor[40088]: "/mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/bin/linuxsteamrt64/cs2" 38175 "/var/lib/systemd/coredump/core.cs2.1000.412d90523f7148b6be9218a9da599185.38175.1763418640000000.zst"
Nov 17 23:30:49 duszke drkonqi-coredump-launcher[40133]: Unable to find file for pid 38175 expected at "kcrash-metadata/cs2.412d90523f7148b6be9218a9da599185.38175.ini"
Nov 17 23:30:50 duszke steam[1804]: /mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/cs2.sh: line 109: 38175 Segmentation fault      (core dumped) ${STEAM_RUNTIME_PREFIX} ${GAME_DEBUGGER} "${GAMEROOT}"/${GAMEEXE} "$@"
Nov 17 23:31:12 duszke steam[1804]: basename: extra operand 'Offensive/game/cs2.sh'
Nov 17 23:31:12 duszke plasmashell[1334]: Failed to find service for Unity Launcher "cs2.desktop"
Nov 17 23:31:12 duszke plasmashell[1334]: Failed to find service for Unity Launcher "cs2.desktop"
Nov 17 23:31:15 duszke steam[1804]: Loaded /mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/bin/linuxsteamrt64/libvphysics2.so, got 0x591afcd64550
Nov 17 23:42:33 duszke systemd-coredump[42052]: Process 40357 (cs2) of user 1000 terminated abnormally with signal 11/SEGV, processing...
Nov 17 23:42:42 duszke systemd-coredump[42054]: Process 40357 (cs2) of user 1000 dumped core.
Nov 17 23:42:42 duszke drkonqi-coredump-processor[42055]: "/mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/bin/linuxsteamrt64/cs2" 40357 "/var/lib/systemd/coredump/core.cs2.1000.412d90523f7148b6be9218a9da599185.40357.1763419353000000.zst"
Nov 17 23:42:42 duszke drkonqi-coredump-launcher[42078]: Unable to find file for pid 40357 expected at "kcrash-metadata/cs2.412d90523f7148b6be9218a9da599185.40357.ini"
Nov 17 23:42:43 duszke steam[1804]: /mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/cs2.sh: line 109: 40357 Segmentation fault      (core dumped) ${STEAM_RUNTIME_PREFIX} ${GAME_DEBUGGER} "${GAMEROOT}"/${GAMEEXE} "$@"
Nov 17 23:42:48 duszke steam[1804]: basename: extra operand 'Offensive/game/cs2.sh'
Nov 17 23:42:48 duszke plasmashell[1334]: Failed to find service for Unity Launcher "cs2.desktop"
Nov 17 23:42:48 duszke plasmashell[1334]: Failed to find service for Unity Launcher "cs2.desktop"
Nov 17 23:42:51 duszke steam[1804]: Loaded /mnt/NVME1/SteamLibrary/steamapps/common/Counter-Strike Global Offensive/game/bin/linuxsteamrt64/libvphysics2.so, got 0x5c885fba00f0```

[Duszkek]

Wanted to wait a week, I don't want to jinx it but after changing to Flatpak version of steam I didn't have any crash in CS2 (or any other game for that matter).

From https://store.steampowered.com/news/app/2246340/view/630069004886606183 post about AMD drivers that break MH:Wilds on windows I kinda suspect that there might be at least partial problem with AMD drivers (even on linux) but I lack knowledge or capacity to confirm that.

For completion I'm adding gist files with steam diagnostics:
https://gist.github.com/Duszkek/fa7fb0a35c4588ca4f9dec984d1a18be - flatpak steam
https://gist.github.com/Duszkek/4feecf8bc2e8005ab16e3c1980d0926b - pacman steam

There might be a clue or some info what flatpak does differently from pacman that might affect stability.

After some time i'll come back to pacman version - after some steam patches and hopefully new amd drivers - and I will check whether the problems dissapear.