Viewing FPS Stats
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Viewing FPS stats on SteamOS is not straightforward at the moment. This is also true for Big Picture Mode users. You may have tried enabling FPS stats in the desktop client in the ordinary Steam for Linux client, only to find that doesn't show up in BPM. You have some options with the custom compositor in SteamOS. One of the following below should work for you.
voglperf is now available via packages.libregeek.org. It may not work with every game (such as wrapper-based games). See https://github.com/ProfessorKaos64/voglperf
Previously, FPS stats could be toggled via an Xbox 360 gamepad. However, due to major changes with SteamOS Brewmaster, the previous udev rules in SteamOS Alchemist no longer work. The developer of VaporOS is currently looking into solutions for Brewmaster
This method involves code from the script steamos-displayfps.sh, dumped into /usr/bin. You will first have to enable access to the Linux desktop by going to Settings > Interface > Enable Access to the Linux desktop. Once there, open a Terminal window by clicking the top left "Activities" word, and typing "Terminal."
Set the user password
passwd
Install SSH access
sudo apt-get install openssh-server
From another computer, run:
ssh desktop@steamos
Install the VaporOS bindings package
./desktop-software install xb360-bindings
Then, toggle FPS stats
sudo runuser -l steam -c '/usr/bin/steamos-displayfps.sh'
