system information

• Steam client version (build number or date): 1745876290
• Distribution (e.g. Ubuntu): NobaraOS KDE 6.14.6-200.nobara.fc42.x86_64
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• GPU: Nvidia main + Integrated Radeon Graphichs AMD

Issue:

I moved to NobaraOS KDE Linux from Windows and set up Steam by downloading it. (not flatpak, so not sandboxed)

I installed and downloaded a couple of games (cs2 and stardew valley)

In CS2, the startup is fine, and I can play offline with bots. But when I start matchmaking in CS2, I get a message "VAC can't verify your session."

From searching online, I have tried the following solutions

• Reboot
• Relauch steam
• clear steam cache
• re login
• verify integrity of game files
• reinstall game
• remove custom launch options/settings

But nothing has worked

Please help. Attaching the entire settings for my env below

plasmashell version = plasmashell 6.3.4

kernel details

NAME="Nobara Linux"
VERSION="42 (KDE Plasma Desktop Edition)"
ID=nobara
ID_LIKE="rhel centos fedora"
VERSION_ID=42
VERSION_CODENAME=""
PLATFORM_ID="platform:f42"
PRETTY_NAME="Nobara Linux 42 (KDE Plasma Desktop Edition)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=nobara-logo-icon
CPE_NAME="cpe:/o:nobaraproject:nobara:42"
DEFAULT_HOSTNAME="nobara"
HOME_URL="https://nobaraproject.org/"
DOCUMENTATION_URL="https://www.nobaraproject.org/"
SUPPORT_URL="https://www.nobaraproject.org/"
BUG_REPORT_URL="https://github.com/nobara-project/nobara-images"
REDHAT_BUGZILLA_PRODUCT="Nobara"
REDHAT_BUGZILLA_PRODUCT_VERSION=42
REDHAT_SUPPORT_PRODUCT="Nobara"
REDHAT_SUPPORT_PRODUCT_VERSION=42
SUPPORT_END=2026-05-13
VARIANT="KDE Plasma Desktop Edition"
VARIANT_ID=kde

kernel version

6.14.6-200.nobara.fc42.x86_64

GPU

01:00.0 VGA compatible controller: NVIDIA Corporation TU117M [GeForce GTX 1650 Mobile / Max-Q] (rev a1)
05:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Renoir [Radeon Vega Series / Radeon Vega Mobile Series] (rev c7)

Launch settings for CS

SDL_AUDIODRIVER=pulse gamescope -f -w 1024 -h 768 -W 1920 -H 1080 -S stretch --force-grab-cursor -- %command%

PS: Also, can you please help me --force-grab-cursor does fix the cursor problems (without it, everything was inverted and not working well) quite a bit. But in my dual monitor setup, the cursor still goes out of the window, and the game stops registering.

I need to stretch a 4:3 res to my monitor

Steps for reproducing this issue:

1. install mentioned nobaraOS kernel
2. install steam using steam.deb downloader
3. provide game launch options to cs2
4. launch game
5. start matchmaking