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Steam Deck5 Reports
only the forced Proton Experimental before the first launch was necessary
With Forced Proton Experimental, the launch parameter "PROTON_LOG=1 %command%" is not needed anymore. Hence, you can play without the constant generation of huge log files. Game works fine, ~50-55 FPS after a few hours on medium settings, DirectX 11.
PROTON_LOG=1 %command%
Launch with PROTON_LOG=1 %command% to fix launcher problem. I also disabled overlay in Ubisoft launcher. To do that you need to launch game in Desktop mode, exit game, open Ubisoft launcher (icon in bottom right), open settings and turn off in-game overlay.
Played docked, 1080p with SteamOS FSR set to 3. Works perfectly well
Could not save due to frequent crashes (black screen, Steam Deck frozen). Increased swap to 16 GB with CryoUtilities v2 to fix.
Even after launcher fixes (Proton-GE, launch command and turn off in-game overlay) Anno 1800 still crashed every 5-10 minutes. It usually happened on save, the screen turned black and I had to force restart Steam Deck wih power button. The problem seems to be in RAM usage, out of memory error. I managed to fix it by using CryoUtilities v2.0: increase swap file to 16 GB and swappiness to 1. I did not apply any other options from CryoUtilities. Larger swap file gave a game more breathing room and crashing stopped.
Plays perfectly after tinkering (CryoUtilities v2 swap size, Proton-GE, Ubisoft launcher fixes). 1080p stable 30-50 fps on medium-low settings. You need to set 1080p in SteamOS game settings. SteamOS FSR set to 3 to upscale to 4k.
PROTON_LOG=1 %command%
Ubisoft Connect has an issue with the default MTU settings on Linux. Enabling the blackhole probing features fixes the Ubisoft Connect globally on the Steam Deck.
echo net.ipv4.tcp_mtu_probing=1 | sudo tee /etc/sysctl.d/custom-mtu-probing.conf
If anyone also wants to remove this workaround again, you can use the following command to undo this change.sudo rm /etc/sysctl.d/custom-mtu-probing.conf
Without setting the custom launch option to PROTON_LOG=1 %command% the game with the MTU change only runs in Desktop mode. But its launchable
Steamdeck desktop with ubisoft connect to offline mode
Removed clicking from touchpads. added buttons to rotate buildings
You need to go offline on ubisoft connect
Ubisoft connect must be disabled in order for the game to pass the 2 min playtime mark on a Steamdeck. Similar issue's as on PC with medium/large game but PC suffers after 2 hours.
Game cannot be launched in offline mode by default. Requires you to first launch the game once. Than return to desktop to set ubisoft connect to offline and than relaunch.
