That's correct; both issues appeared around the same time. I suspect SteamVR might also be effected, but I'm less able to consistently reproduce the issue there. But that might just speak to my lack of VR hardware to test with.
How might I provide a crash dump?
I've discovered something weird while trying to debug this myself: running 'strace -f steam' somehow prevents the crash from happening. Everything seems to work, but only with strace -f.
I agree with @kisak-valve this is probably https://github.com/ValveSoftware/steam-for-linux/issues/8695, that button launches a big picture UI window ..
Your system information
Please describe your issue in as much detail as possible:
System info gist
Steam client will crash any time I attempt to access General Controller Settings. I have reinstalled and even downgraded NVIDIA graphics drivers (515.65.01 and 470.141.03), but with no noticeable difference.
This might also be related to another bug where attempting to start BigPicture mode will also crash the client.
Steps for reproducing this issue: