EDIT: The issue was caused by my SSD being formatted in exFAT, which doesn’t support symlinks. I backed up my SSD & reformatted it to btrfs, and then I could install .NET without hassle & the game runs!
Original Post:
I’m having an issue running this game on linux, every time I click play in Steam I get the following popup:
“you must install .NET desktop runtime to run this application”
Clicking “yes” takes me to download a Windows .exe which of course can’t run on linux. I manually installed the .NET runtime following linux instructions here: https://learn.microsoft.com/en-us/dotnet/core/install/linux-debian but the game still gives me this error.
Other things I’ve tried:
- Reinstalling BG3
- Completely deleting every file from steamapps/common for BG3 & reinstalling
- Reinstalling Proton
- Skipping the launcher
- Tried with proton experimental, 9, 8, 7
My launch args are STEAM_COMPAT_DATA_PATH=/home/user/.local/share/Steam/steamapps/compatdata gamemoderun %command% --skip-launcher
On protondb everybody else seems to be running the game fine, but I don’t understand how to get past this error.
Skip the useless launcher. Set the steam shortcut to run the game exe directly, it doesn’t need anything special, been playing it fine on Debian and arch with both nvidia and amd gpus as well as my steam deck.
I already skip the launcher but this error still happens. My launch args are
STEAM_COMPAT_DATA_PATH=/home/user/.local/share/Steam/steamapps/compatdata %command% --skip-launcher
I don’t know if --skip-launcher is a valid command line option. If it is, I expect it just tells the launcher to immediately launch the game without showing a launcher screen. Of course, if the launcher requires a version of .Net that isn’t set up correctly, then it can’t run at all, and therefore can’t even get as far as noticing the command line option (let alone run the game). So I wouldn’t expect this to work.
Instead, read through the bug report that I linked earlier. Look for the comments that explain how to make Steam run bg3_dx11.exe or bg3.exe instead of running the launcher at all. (I don’t remember the exact paths, so I can’t just write the correct command line here.)
(Note: GitHub often hides some comments until you click the link to reveal more of them, so just using Control+F in your browser might not find these comments until you’ve clicked it several times.)
I think you’ve just pointed me in the direction of a solution…
The comment you’re referring to seems to be this one:
mv Launcher Launcherbak
ln -s bin Launcher
ln -s ./bin/bg3_dx11.exe ./bin/LariLauncher.exe
cp ./Launcherbak/*.dll ./bin
creating a symlink to trick steam into thinking it’s running the launcher when it actually runs the game. BUT … my SSD is formatted as exFAT, which doesn’t support symlinks, so I can’t do this.
So I’m guessing proton is trying to create a symlink at pfx/dosdevices/c when it installs .NET, but fails, which is also probably why everyone else seems to have a breezy time with it. Not sure why my other games haven’t run into this though… maybe they haven’t needed to install anything there?
I will report back after reformatting my entire SSD lol
Did you try stripping out everything in the launch options except ‘–skip-launcher’? I tried your command and it didn’t launch but then tried just the skip option and it worked again.
I need STEAM_COMPAT_DATA_PATH because my proton is installed in a different steam library than the game, all of my proton games use this. I tried to remove it anyway and try just ‘–skip-launcher’, but now the game doesn’t launch lol
The command likely won’t work for you because you don’t have proton installed at that location
Steam should handle this stuff by itself. I’d report it as a bug. But in the meantime you can do what the others said, use Protontricks to install the .Net runtime.
When you need a component such as the .NET framework you can install it in Wine/Proton using the Windows installers. The .exe you are being recommended should be able to run, but the other way around it is to use something like protontricks, a proton version of winetricks (technically it uses winetricks and is more of a set of integrations and a GUI, but yeah). Using protontricks you can install the .NET framework, the C++ runtimes, dxvk, and other tools. I would recommend learning a little about how to use protontricks and maybe look for a few specific tutorials for using it with specific games to get a feel for it.
I see!
I installed protontricks and read through the usage instructions
I’ve done protontricks-launch --appid 1086940 /home/user/Downloads/windowsdesktop-runtime-6.0.35-win-x64.exe
but it looks like it’s stuck?
pressure-vessel-locale-gen: Missing locale en_US.UTF-8
pressure-vessel-locale-gen: Generating locale en_AU.UTF-8...
pressure-vessel-locale-gen: Generated locale en_AU.UTF-8 successfully
pressure-vessel-locale-gen: Generating locale en_US.UTF-8...
pressure-vessel-locale-gen: Generated locale en_US.UTF-8 successfully
pressure-vessel-adverb[101880]: W: Container startup will be faster if missing locales are created at OS level
0084:err:file:init_redirects /media/user/T7/Main/Games/SteamInstalled/steamapps/compatdata/1086940/pfx/dosdevices/c:/windows: No such file or directory
Thank you for pointing me in the right direction, I’ve never used protontricks before
Edit: using protontricks 1086940 dotnetdesktop7 seems to get past that point, but then I get another error
protontricks (ERROR): Active compatibility tool was found, but it's not a Proton installation supported by Protontricks.
Proton installation could not be found!
my proton is installed in a different steam library than BG3, could this cause issues?
It is possible, can you confirm the filesystem your steam install is on? The T7 mount looks like an automatic user mount, is it a standard ext4 or btrfs partition? Also, why is it mounting there, not in a fixed location denoted in your /etc/fstab file? If it is just automatic mounting there are some possible issues that could come from that, it may be worth testing another windows game through proton installed in the same steam library folder.
That all said, you definitely need to have proton installed. If you go to your steam library you should be able to search for proton there. I would recommend installing the current version, the experimental, and if it is there proton-ge. I haven’t used Debian for a while so I don’t know what is in your repos but searching for proton-ge there may also have results.
Once you definitely have the latest and experimental versions try switching version, testing with protontricks. It should show up both versions and allow you to switch between them without problems. You may also need to define your proton prefix as an environmental variable, something like PROTONPREFIX=/path/to/your/T7/proton/prefix/
If you can’t get that going consider jumping on to a matrix channel for more second by second help, tonnes of people are happy to help you get wine/proton working correctly.
Try deleting the prefix (steamapps/compatdata/1086940). This should work completely fine out of the box. (Not sure if uninstalling the game deletes that already, just in case)
Still the same error unfortunately.
Interestingly though, when I try to install .NET manually via protontricks-launch -v --appid 1086940 /home/user/Downloads/windowsdesktop-runtime-6.0.35-win-x64.exe I get the following error:
/media/user/T7/Main/Games/SteamInstalled/steamapps/compatdata/1086940/pfx/dosdevices/c:/windows: No such file or directory
Going down that tree I see the entire path is there except for “/c” at the end. I manually added a “c” folder, but then I get stuck at this error:
protontricks (ERROR): Active compatibility tool was found, but it's not a Proton installation supported by Protontricks.
Proton installation could not be found!
I know my proton installation works because all my other games use it fine. Proton is on a different drive than BG3, could that cause issues?
dosdevices/c: is missing I’m assuming is what you mean? That’s very weird, it is there in every wine prefix and should be a link to …/drive_c.
Proton is on a different drive than BG3, could that cause issues?
I don’t think so.
Have you tried (in Steam’s properties for the game) switching the compatibility setting to force Proton Experimental? You might also need other workarounds, like configuring Steam to skip the game’s launcher.
The best place to find and discuss options is here:
https://github.com/ValveSoftware/Proton/issues/4243
Also, you might want to join this community:
