So, I am looking for any ideas, help or head(s) smarter than mine.

This is my main problem for some time now, easiest way to replicate this is to run anything proton related. After that, some apps just keep spitting this via dmesg:

[ 1403.146954] eartag[5309]: segfault at 30 ip 000077f7d796491c sp 00007ffe20a35210 error 6 in libgtk-4.so.1.1400.4[56491c,77f7d74c7000+4c2000] likely on CPU 7 (core 3, socket 0)
[ 1403.146964] Code: c2 4c 8d 4d c0 48 8d 35 02 75 4a 00 45 31 c0 0f b6 d2 e8 c7 4c 01 00 f3 0f 10 03 48 8b 55 c0 4c 89 fe f3 41 0f 58 07 4c 89 f7 <f3> 0f 11 42 30 f3 0f 10 43 04 f3 41 0f 58 47 04 f3 0f 11 42 34 f3

[ 1408.104856] gnome-system-mo[5360]: segfault at 30 ip 00007c02762ec29e sp 00007ffc399829d0 error 6 in libgtk-4.so.1.1400.5[4ec29e,7c0275e81000+4b5000] likely on CPU 1 (core 1, socket 0)
[ 1408.104871] Code: 48 8d 35 c5 6f 62 00 45 31 c0 e8 fd 0f 01 00 48 8b 45 b0 48 8b 5d c0 4c 89 ff f3 41 0f 10 04 24 f3 0f 58 00 48 89 da 48 89 c6 <f3> 0f 11 43 30 f3 41 0f 10 44 24 04 f3 0f 58 40 04 f3 0f 11 43 34

[ 1434.535310] blackbox[5476]: segfault at 30 ip 00007d7ba0f6491c sp 00007ffcc9c2bfb0 error 6 in libgtk-4.so.1.1400.4[56491c,7d7ba0ac7000+4c2000] likely on CPU 4 (core 0, socket 0)
[ 1434.535318] Code: c2 4c 8d 4d c0 48 8d 35 02 75 4a 00 45 31 c0 0f b6 d2 e8 c7 4c 01 00 f3 0f 10 03 48 8b 55 c0 4c 89 fe f3 41 0f 58 07 4c 89 f7 <f3> 0f 11 42 30 f3 0f 10 43 04 f3 41 0f 58 47 04 f3 0f 11 42 34 f3

[ 1519.054496] tidal-hifi[5241]: segfault at 0 ip 0000776c9650bccc sp 00007ffce741f1a0 error 6 in libnvidia-glcore.so.560.35.03[b0bccc,776c95e00000+c00000] likely on CPU 1 (core 1, socket 0)
[ 1519.054505] Code: 41 0f 7e ce 89 fd 48 8b 80 80 00 00 00 c1 e2 12 66 41 0f 7e d5 48 b9 72 0e 05 a0 04 00 00 00 81 ca 00 0e 00 80 66 41 0f 7e dc <89> 10 48 83 c0 1c 48 89 48 e8 66 0f 7e 40 f0 66 0f 7e 48 f4 66 0f

After a restart, all apps run perfectly fine of course and I can do whatever I need to do, until they stop working again.

• On one forum, someone was suggesting a problem with memory, so I memtested it hard — everything is fine

• On another, the idea was to reinstall intel-ucode package, this unfortunately didn't help neither

• Finally, I've tried sudo pacman -Qnq | sudo pacman -S - because it was a suggestion somewhere too, no changes after that

My boat:

Arch Linux x86_64 / 6.10.9-arch1-2
Gnome 46.4 / Mutter (X11)
@
ASUS Z97-PRO (Wi-Fi ac)
INTEL i7-4790 + NVIDIA GTX 1070 Ti

Big, fat thanks for your time!

Update: Idea from jrgd did the trick! I am still testing it, but so far, I can't force anything to fail and everything seems to be working fine!