Hi, I have installed the Linux (Ubuntu 16.04) version of "Baldur's Gate 2 complete" but I can't seem to get the resolution a bit higher.

I tried to download and use WeiDU for linux but I failed.

I did as per instructions. I downloaded the file and extracted the three files in my $PATH. I then changed directory to my GOG - BG2 installation and tried this:

chris@ubuntu-pc ~/G/Baldurs Gate 2 Complete> tolower
Do you want to lowercase everything?
(run if you extracted some mods since the last time you ran this utility)
[Y]es or [N]o
Y
Do you want to generate linux.ini from baldur.ini?
(needed once per installation)
[Y]es or [N]o
Y
Fatal error: exception Sys_error("/home/chris/.wine/dosdevices: No such file or directory")

I also tried this:

chris@ubuntu-pc ~/G/Baldurs Gate 2 Complete> weinstall widescreen
Error: Failure("ERROR: TP2 file not found.")

Is there any way to increase resolution to something more than the default? I don't mind the windowed mode.

Any help would be appreciated.

Please, post the output of the following command:

Weclome to fish, /home/chris!
chris@ubuntu-pc ~> ls -la ~/.wine/dosdevices/
ls: cannot access '/home/chris/.wine/dosdevices/': No such file or directory
chris@ubuntu-pc ~>

This explains everything: either Wine is not configured or not installed at all. Please, install Wine, then run winecfg.

Actually, IIRC, the script is hardcoded and the GOG install doesn't use "$HOME/.wine" as it's prefix.

Correct: even though I have never installed the Linux version, I suppose it comes with Wine pre-packaged. But the WeiDU install script needs Wine to be installed.