System detection failed error will pop up but can be closed and ignored and the boot will proceed. Signed into Ubi Connect on first install and the game boots to the menu with no issues

Use Gamepad required checking in the in game settings menu, but as soon as that is checked the Xbox pad layout is immediately detected and works

The framerate is terrible but can be fixed if you address the CPU core usage. This can be done by creating a .sh script file in Desktop mode:

#!/bin/bash

while :;

do PID=`ps ax | grep conviction_game |

grep E: | awk '{ print $1 }'`;

if [ -n "$PID" ]; then

taskset -cap 0-15 "$PID";

fi; sleep 5;

done;

After copying this into a text editor and saving i.e. scc.sh, you need to run the script while the game is running. To do so, install the Decky plugin Bash Shortcuts. Create a shortcut with the command:

LD_PRELOAD= QT_SCALE_FACTOR=1.25 konsole -e "/home/deck/./scc.sh"

(make sure the file path is correct for where you have saved the script file)

Mark the box "does this launch an app?" As yes, then save. When you boot Splinter Cell Conviction, use Decky to start this Bash Shortcut and the script will run in the background and drastically increase performance to locked 30fps even with high shadow and environment settings.