(All Proton versions, Various games.) Unable to run many of the games in my library.

[itryen]

Hello!
First of all, I am very sorry if this is most likely a problem caused by my own linux illiteracy. I've only been using it since January.

I've been having problems running pretty much half of my library on linux, with each game seemingly . Here's a rundown of what happens whenever i try to run some of my games, sorted from worst to best outcome:

Foxhole:
-Boots up, shows one frame of the loading screen, then freezes.
-My desktop environment (KDE Plasma) refuses to work.
-I cannot exit fullscreen, close tthe application, access the taskbar or do anything other than move my cursor around.
-I have to reboot my entire system to return to my desktop.

Death Stranding:
-Game runs for a few seconds, then the screen freezes,
-Either i wait for the window to close on its own, or i press the meta key to pull up the taskbar, at which point the game advances by one or two frames, before locking up for good.

No Man's Sky:
-The game runs fine for a seemeingly random period of time, ranging from a few minutes to a couple hours, regardles of where i am or what i do in game.
-The game then freezes, i receive a crash report prompt, but the window refuses to close after i close the prompt.

Dorfromantik:
-The game crashes immediately after i launch it through steam using proton.
-Somehow, the game performs perfectly while running it via wine.

Mewgenics:
-Runs perfectly through Proton.
-Maybe knowing which games don't cause issues could help figuring what exactly the cause of my crashes is.

Native Linux games also run well.

I've already tried:

-Verifying game files.
-Using multiple different proton versions.
-Updating all of my drivers.
-Making sure i have all necessary drivers installed.
-Performing for conflicting packages multiple times.
-Making sure my games are installed on a correctly formatted drive.
-Adding the instructions "__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia %command%" to the launch options, as suggested by someone from the ProtonDB IRC chat.
-Searching for others who've had similar issues.

None of those things worked.

Here is my system information:

Computer Information:
Manufacturer: LENOVO
Model: LNVNB161216
Form Factor: Laptop
No Touch Input Detected

Processor Information:
CPU Vendor: GenuineIntel
CPU Brand: Intel(R) Core(TM) i5-7300HQ CPU @ 2.50GHz
CPU Family: 0x6
CPU Model: 0x9e
CPU Stepping: 0x9
CPU Type: 0x0
Speed: 3500 MHz
4 logical processors
4 physical processors
Hyper-threading: Unsupported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Supported
AES: Supported
AVX: Supported
AVX2: Supported
AVX512F: Unsupported
AVX512PF: Unsupported
AVX512ER: Unsupported
AVX512CD: Unsupported
AVX512VNNI: Unsupported
SHA: Unsupported
CMPXCHG16B: Supported
LAHF/SAHF: Supported
PrefetchW: Unsupported
BMI1: Supported
BMI2: Supported
F16C: Supported
FMA: Supported

Operating System:
openSUSE Tumbleweed (64 bit)
Kernel Name: Linux
Kernel Version: 6.19.12-1-default
X Server Vendor: The X.Org Foundation
X Server Release: 12101021
X Window Manager: KWin
Steam Runtime Version: steam-runtime_1.0.20260316.216267

Client Information:
Version: 1777411435
Browser GPU Acceleration Status: Disabled
Browser Canvas: Unavailable
Browser Canvas out-of-process rasterization: Disabled
Browser Direct Rendering Display Compositor: Disabled
Browser Compositing: Disabled
Browser Multiple Raster Threads: Enabled
Browser OpenGL: Disabled
Browser Rasterization: Disabled
Browser Raw Draw: Disabled
Browser Skia Graphite: Disabled
Browser Video Decode: Disabled
Browser Video Encode: Disabled
Browser Vulkan: Disabled
Browser WebGL: Unavailable
Browser WebGL2: Unavailable
Browser WebGPU: Disabled
Browser WebNN: Disabled

Video Card:
Driver: NVIDIA Corporation NVIDIA GeForce GTX 1050 Ti/PCIe/SSE2
Driver Version: 4.6.0 NVIDIA 580.159.03
OpenGL Version: 4.6
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID: 0x8086
DeviceID: 0x591b
Revision Not Detected
Number of Monitors: 1
Number of Logical Video Cards: 1
Primary Display Resolution: 1920 x 1080
Desktop Resolution: 1920 x 1080
Primary Display Size: 13.54" x 7.64" (15.51" diag), 34.4cm x 19.4cm (39.4cm diag)
Primary VRAM: 4096 MB

Sound card:
Audio device: Realtek ALC233

Memory:
RAM: 23924 Mb

VR Hardware:
VR Headset: None detected
No VR configuration with trackers detected
Most number of trackers in a session: 0

Miscellaneous:
UI Language: English
LANG: de_DE.UTF-8
Total Hard Disk Space Available: 859791 MB
Largest Free Hard Disk Block: 585431 MB

Storage:
Number of SSDs: 2
SSD sizes: 2000G,1000G
Number of HDDs: 0
Number of removable drives: 0

I hope there is no problem with the lack of screenshots or log files. Please notify me if they're needed.
I hope there's a way out of this conundrum for me.
Thank you for your attention!

[VarangW]

Could be a Low file descriptor limit
Check it #9730
Had the same problem after updating my kernel, fixed by increasing it

[itryen]

I checked the file descriptor limit. It's very low, so that's probably what's causing the issues! I'm gonna try to figure out how to increase it, and then i'll report back.

[itryen]

I've increased the limit to 8192, then 131072, then 262144. Death Stranding seems to work now, but Foxhole still freezes everything except the cursor, forcing a reboot.

[itryen]

Update:
I switched the desktop environment from x11 to Wayland, and now everything works correctly!
Therefore i think my issue was a combination of both having a low file descriptor, and using x11.
If i remember correctly, x11 is slowly being phased out by the major distros, so maybe this issue won't affect many people at all. But it would still be nice to receive a notice or a set of instructions, whenever someone faces a similar issue to me.