This is a duplicate of https://github.com/ValveSoftware/steam-for-linux/issues/6845 and https://github.com/ValveSoftware/steam-for-linux/issues/6499.
Based on https://github.com/ValveSoftware/steam-runtime/issues/253 you are forcing an incompatible fontconfig to libcef, which causes the problem.
On Fri, Apr 24, 2020 at 08:03:28AM -0700, TTimo wrote:
Closed #7059.
What do you mean? The breaking fontconfig is the verbatim one from the steam-runtime.
I don't understand.
Wow.
Yesterday, I could not check the issues you were refering to because github
would send me a blunt "not found" error code... Today it worked and I could verify
that my issue was actually a duplicate of 6845. Something web/internet is
significantly "laggy".
with an up-to-date beta client, using the steam-runtinem fontconfig library will break the client, which will periodically output:
"STEAM_RUNTIME_HEAVY: ./steam-runtime-heavy
./steamwebhelper: symbol lookup error: ./libcef.so: undefined symbol: FcConfigGetSysRoot"