The log is a plain text file. No special viewer needed.
Environment Variable | Description |
---|---|
PROTON_LOG |
Convenience method for dumping a useful debug log to $PROTON_LOG_DIR/steam-$APPID.log . Set to 1 to enable default logging, or set to a string to be appended to the default WINEDEBUG channels. |
PROTON_LOG_DIR |
Output log files into the directory specified. Defaults to your home directory. |
https://github.com/ValveSoftware/Proton/#runtime-config-options
I think you can set the
WINEDEBUG=+eventlog
environment variable to make Windows Event Log entries appear on stderr (the standard error stream). You can normally see this output if you run Steam from a terminal window. You may be able to redirect it to a file using Steam launch options, but I’ve never tried it.