Don't know if this would help but I managed to do this to make the game work a little more fluently:

I'm running the GOG Linux version of **The Witcher 2: Enhanced Edition** on a Lenovo ThinkCentre M920q Tiny with an Intel Core i5-8500T, Intel UHD 630 integrated graphics, 24 GB RAM, and a 256 GB NVMe SSD. The OS is Linux Mint 22.1 Cinnamon, updated to kernel 6.8.0-138.

I installed the game using GOG's `.sh` installer. The first launch failed because the 32-bit GTK 2 libraries were missing:

```text
libgtk-x11-2.0.so.0 => not found
libgdk-x11-2.0.so.0 => not found
```

I installed them with:

```bash
sudo apt install libgtk2.0-0t64:i386
```

The next launch reported a missing SDL2_image library:

```text
libSDL2_image-2.0.so.0 => not found
```

That was resolved with:

```bash
sudo apt install libsdl2-image-2.0-0:i386
```

After that, the game launched and was playable, but the 3D gameplay felt sluggish. The mouse cursor was noticeably smoother in the pause/menu screens than during gameplay, which made me suspect rendering performance rather than a mouse problem.

The launcher's **Options** button also wasn't working for me: it would briefly minimize and maximize the launcher without opening the graphics configurator. So I edited the configuration manually.

My configuration file is located at:

```text
~/.local/share/cdprojektred/witcher2/GameDocuments/Witcher 2/config/User.ini
```

I changed the following settings:

```ini
[Engine]
CustomRenderingSettings=1
PerformancePlatform=0
```

And under `[Rendering]`:

```ini
AllowAntialias=0
AllowBloom=0
AllowBlur=0
AllowDOF=0
AllowShafts=0
AllowSharpen=0
MaxAtlasTextureSize=1024
MaxTextureSize=1024
TextureMemoryBudget=256
```

I left the other settings unchanged. Ubersampling was already disabled:

```ini
UberSampling=0
```

This **did improve performance**, although the game still didn't feel completely smooth.

I then tested the game at a lower resolution. My desktop normally runs at **1920×1080, 60 Hz**, so I temporarily changed the display to 1280×720:

```bash
xrandr --output HDMI-2 --mode 1280x720
```

The game felt noticeably better at 720p. I restored the desktop afterward with:

```bash
xrandr --output HDMI-2 --mode 1920x1080
```

I didn't want to keep my entire desktop at 720p, so I also added this section to the end of `User.ini`:

```ini
[Viewport]
Height=720
Width=1280
```

**I haven't yet confirmed whether the Linux port actually respects that last setting**, so I can't claim that part is a working fix.

The main result so far is that the game does run on the UHD 630, and reducing graphical effects and resolution makes it more playable. I'm still looking for a reliable way to make the game itself run at 720p while keeping the Mint desktop at 1080p.