In reply to @tejing:matrix.org
I've checked logs in quite a bit of detail. the steamwebhelper processes are dying on SIGILL, which means they're trying to execute an illegal instruction (I've never actually seen that one before)

In reply to @pedrohlc:ubiquelambda.dev
try deleting .local/share/Steam/config/htmlcache/GPUCache

In reply to @tejing:matrix.org
no help, unfortunately

In reply to @pedrohlc:ubiquelambda.dev
Just to be in peace with it: you're not using my/Chaotic's mesa_git, right?

In reply to @ktn:the-apothecary.club
Recording average framerates and frametimes etc of my games

In reply to @tejing:matrix.org
Anyone else just restart steam and have it totally blow up their machine? The interface was scaling oddly, and steamwebhelper seemed to keep dying and being restarted, leaving behind zombie processes. Before long my system was near-unresponsive... took me a while to get a handle on it and even then an unrelated electron app never recovered for some reason. I had to kill -9 it, too. :-/

In reply to @charles:computer.surgery
if you updated your machine before steam started misbehaving, try rebooting

So, had a problem a couple months ago where, due to intel driver buggyiness, classicube's fog acted very weirdly. ended up fixing it a few months ago, pasting code for posterity

        (unstable.classicube.overrideAttrs(previousAttrs: {#another package that exists
                makeFlags = ["PLAT=linux"];
                #Unfortunately you can't put flags with spaces in makeFlags so
                #this horribleness is needed instead. Why even use a list then...
                #Taken from default CFLAGS from the makefile, make sure they aren't changed from this!
                #Also defines CC_BUILD_GLMODERN so this creates OpenGL 2 code.
                preBuild = ''makeFlagsArray+=(CFLAGS="-g -pipe -fno-math-errno -DCC_BUILD_GLMODERN")'';}))