Little to no pressure sensitivity on tablet while drawing vertically #44078

New Issue

TurboDentha · 2015-03-21T15:44:55+01:00

TurboDentha commented

2015-03-21 15:44:55 +01:00

System Information
Machine 1
Xubuntu 14.04.2
linux kernel 3.13.0-46-generic
graphics card Nvidia GTX 260
tablet Huion 580

Machine 2
Xubuntu 14.04.2
linux kernel 3.13.0-46-generic
graphics card Mobile Intel GM45 Express Chipset
tablet Huion 580 (same tablet)

Blender Version
Broken: 2.74.1 0582aa6

When using a pressure sensitive tablet, drawing straight vertically up and down seems to register little to no pressure sensitivity causing very transparent (for Strength) lines and very thin (Radius). Drawing horizontally and drawing at very steep slopes works as expected. The erratic behaviour only seems to happen when drawing perfectly straight up and down. Seems to happen in when drawing on images and also occurs when sculpting.

Can't reproduce the same effects in Gimp 2.8.10 (Ubuntu Trusty Tahr Repository) and Inkscape 0.48 (Ubuntu Trusty Tahr Repository).

Exact steps for others to reproduce the error

Plug in graphics tablet.
Open blender.
Change the editor type to UV/Image Editor
Create a new image.
Change the editing context to Paint.
Ensure that pressure sensitivity is enabled for Strength and/or Radius
Draw Up and Down on the image.

**System Information** Machine 1 Xubuntu 14.04.2 linux kernel 3.13.0-46-generic graphics card Nvidia GTX 260 tablet Huion 580 Machine 2 Xubuntu 14.04.2 linux kernel 3.13.0-46-generic graphics card Mobile Intel GM45 Express Chipset tablet Huion 580 (same tablet) **Blender Version** Broken: 2.74.1 0582aa6 When using a pressure sensitive tablet, drawing straight vertically up and down seems to register little to no pressure sensitivity causing very transparent (for Strength) lines and very thin (Radius). Drawing horizontally and drawing at very steep slopes works as expected. The erratic behaviour only seems to happen when drawing perfectly straight up and down. Seems to happen in when drawing on images and also occurs when sculpting. Can't reproduce the same effects in Gimp 2.8.10 (Ubuntu Trusty Tahr Repository) and Inkscape 0.48 (Ubuntu Trusty Tahr Repository). **Exact steps for others to reproduce the error** 1) Plug in graphics tablet. 2) Open blender. 3) Change the editor type to **UV/Image Editor** 4) Create a new image. 5) Change the editing context to **Paint**. 6) Ensure that pressure sensitivity is enabled for **Strength** and/or **Radius** 7) Draw Up and Down on the image.

TurboDentha commented

2015-03-21 15:44:55 +01:00

Changed status to: 'Open'

TurboDentha commented

2015-03-21 15:44:55 +01:00

Added subscriber: @TurboDentha

marc dion commented

2015-03-22 13:14:49 +01:00

Added subscriber: @MarcClintDion

marc dion commented

2015-03-22 13:14:49 +01:00

OSX 10.9.5

Blender: 2.74.1

Intuos 5.

This could be an OS or Tablet brand/model specific problem. It looks fine here.

OSX 10.9.5 Blender: 2.74.1 Intuos 5. This could be an OS or Tablet brand/model specific problem. It looks fine here. ![pressure.png](https://archive.blender.org/developer/F154062/pressure.png)

TurboDentha commented

2015-03-22 14:43:31 +01:00

I'm beginning to think this might be an OS/Driver error after all. I could have sworn that the tablet worked properly on Xubuntu 14.04 at one point and an update along the way caused this behavior to happen. I re-installed Xubuntu 14.04 to confirm it wasn't an update to the system but it seems to have the erratic behavior on that as well.

Windows 7 Home Premium

Blender 2.73 b4d8fb5

NVidia GTX 260

Huion Tablet 580

I can't reproduce the bug. Everything seems to be working as normal.

I'm beginning to think this might be an OS/Driver error after all. I could have sworn that the tablet worked properly on Xubuntu 14.04 at one point and an update along the way caused this behavior to happen. I re-installed Xubuntu 14.04 to confirm it wasn't an update to the system but it seems to have the erratic behavior on that as well. Windows 7 Home Premium Blender 2.73 b4d8fb5 NVidia GTX 260 Huion Tablet 580 I can't reproduce the bug. Everything seems to be working as normal.

Julian Eisel commented

2015-03-22 15:51:52 +01:00

Changed status from 'Open' to: 'Archived'

Julian Eisel closed this issue

2015-03-22 15:51:52 +01:00

Julian Eisel self-assigned this 2015-03-22 15:51:52 +01:00

Julian Eisel commented

2015-03-22 15:51:52 +01:00

Yeah indeed, this looks like an OS/driver issue for which we can't do much.

So thanks for the report but closing for now.

Yeah indeed, this looks like an OS/driver issue for which we can't do much. So thanks for the report but closing for now.

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Little to no pressure sensitivity on tablet while drawing vertically #44078