I've installed my Wacom Bamboo Pen + Touch (CTH-460) in Ubuntu (at least on one system, not another) and the pen works well for controlling the mouse cursor. However, I can't get pressure sensitivity to work in GIMP.

I have 4 extra devices in the input devices settings screen now, two of which are the pen and eraser. I've set them both from Disabled to Screen, and left the default settings intact.

However, after saving I still don't see any pressure options in the brush tool's options.

I've also tried setting the mode to Window instead, but it makes no difference regarding pressure sensitivity. There are no other modes.

The pressure works out-of-the-box in Blender (grease pen) so it must be something in GIMP.

What can be wrong? Why don't the options appear? How can I debug this?