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Blender ignores touch input under wayland session. #121449

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opened 2024-05-05 21:09:55 +02:00 by Henrique-Alves · 6 comments
Henrique-Alves commented 2024-05-05 21:09:55 +02:00
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System Information
Operating system: Linux-6.4.15-200.fc38.x86_64-x86_64-with-glibc2.37 64 Bits, WAYLAND UI
Graphics card: AMD Radeon Graphics (renoir, LLVM 16.0.6, DRM 3.52, 6.4.15-200.fc38.x86_64) AMD 4.6 (Core Profile) Mesa 23.1.9

Blender Version
Broken: version: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: e1743a0317bc
Worked: None
Tested: 3.6.11 from fedora 4.1.1 from flathub, 4.1.1 in kernel 6.8

Short description of error
Touch input is ignored by blender in wayland system in touchscreen. It works as expected in touchpad. Pen input also works. Other programs work fine, the issue is blender specific. Using evtest, the ignored device is:

Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x56a product 0x52fa version 0x100
Input device name: "Wacom HID 52FA Finger"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 330 (BTN_TOUCH)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value   5860
      Min        0
      Max    11440
      Resolution      40
    Event code 1 (ABS_Y)
      Value   2667
      Min        0
      Max     7152
      Resolution      40
    Event code 47 (ABS_MT_SLOT)
      Value      0
      Min        0
      Max        9
    Event code 53 (ABS_MT_POSITION_X)
      Value      0
      Min        0
      Max    11440
      Resolution      40
    Event code 54 (ABS_MT_POSITION_Y)
      Value      0
      Min        0
      Max     7152
      Resolution      40
    Event code 57 (ABS_MT_TRACKING_ID)
      Value      0
      Min        0
      Max    65535
  Event type 4 (EV_MSC)
    Event code 5 (MSC_TIMESTAMP)
Properties:
  Property type 1 (INPUT_PROP_DIRECT)
Testing ... (interrupt to exit)

The Pen input works as expected, and shows up as:

Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x56a product 0x52fa version 0x100
Input device name: "Wacom HID 52FA Pen"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 320 (BTN_TOOL_PEN)
    Event code 321 (BTN_TOOL_RUBBER)
    Event code 330 (BTN_TOUCH)
    Event code 331 (BTN_STYLUS)
    Event code 332 (BTN_STYLUS2)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min        0
      Max    28604
      Fuzz       4
      Resolution     100
    Event code 1 (ABS_Y)
      Value      0
      Min        0
      Max    17878
      Fuzz       4
      Resolution     100
    Event code 24 (ABS_PRESSURE)
      Value      0
      Min        0
      Max     4095
    Event code 26 (ABS_TILT_X)
      Value      0
      Min    -9000
      Max     9000
      Resolution    5730
    Event code 27 (ABS_TILT_Y)
      Value      0
      Min    -9000
      Max     9000
      Resolution    5730
    Event code 40 (ABS_MISC)
      Value      0
      Min        0
      Max      255
  Event type 4 (EV_MSC)
    Event code 0 (MSC_SERIAL)
    Event code 5 (MSC_TIMESTAMP)
Properties:
  Property type 1 (INPUT_PROP_DIRECT)
Testing ... (interrupt to exit)

The touch works as expected under X11 (although there's room for improvement, hehe).

Exact steps for others to reproduce the error
Start Blender under a wayland session
Try to interact with menus using a touchscreen and finger

**System Information** Operating system: Linux-6.4.15-200.fc38.x86_64-x86_64-with-glibc2.37 64 Bits, WAYLAND UI Graphics card: AMD Radeon Graphics (renoir, LLVM 16.0.6, DRM 3.52, 6.4.15-200.fc38.x86_64) AMD 4.6 (Core Profile) Mesa 23.1.9 **Blender Version** Broken: version: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: `e1743a0317bc` Worked: None Tested: 3.6.11 from fedora 4.1.1 from flathub, 4.1.1 in kernel 6.8 **Short description of error** Touch input is ignored by blender in wayland system in touchscreen. It works as expected in touchpad. Pen input also works. Other programs work fine, the issue is blender specific. Using evtest, the ignored device is: ``` Input driver version is 1.0.1 Input device ID: bus 0x18 vendor 0x56a product 0x52fa version 0x100 Input device name: "Wacom HID 52FA Finger" Supported events: Event type 0 (EV_SYN) Event type 1 (EV_KEY) Event code 330 (BTN_TOUCH) Event type 3 (EV_ABS) Event code 0 (ABS_X) Value 5860 Min 0 Max 11440 Resolution 40 Event code 1 (ABS_Y) Value 2667 Min 0 Max 7152 Resolution 40 Event code 47 (ABS_MT_SLOT) Value 0 Min 0 Max 9 Event code 53 (ABS_MT_POSITION_X) Value 0 Min 0 Max 11440 Resolution 40 Event code 54 (ABS_MT_POSITION_Y) Value 0 Min 0 Max 7152 Resolution 40 Event code 57 (ABS_MT_TRACKING_ID) Value 0 Min 0 Max 65535 Event type 4 (EV_MSC) Event code 5 (MSC_TIMESTAMP) Properties: Property type 1 (INPUT_PROP_DIRECT) Testing ... (interrupt to exit) ``` The Pen input works as expected, and shows up as: ``` Input driver version is 1.0.1 Input device ID: bus 0x18 vendor 0x56a product 0x52fa version 0x100 Input device name: "Wacom HID 52FA Pen" Supported events: Event type 0 (EV_SYN) Event type 1 (EV_KEY) Event code 320 (BTN_TOOL_PEN) Event code 321 (BTN_TOOL_RUBBER) Event code 330 (BTN_TOUCH) Event code 331 (BTN_STYLUS) Event code 332 (BTN_STYLUS2) Event type 3 (EV_ABS) Event code 0 (ABS_X) Value 0 Min 0 Max 28604 Fuzz 4 Resolution 100 Event code 1 (ABS_Y) Value 0 Min 0 Max 17878 Fuzz 4 Resolution 100 Event code 24 (ABS_PRESSURE) Value 0 Min 0 Max 4095 Event code 26 (ABS_TILT_X) Value 0 Min -9000 Max 9000 Resolution 5730 Event code 27 (ABS_TILT_Y) Value 0 Min -9000 Max 9000 Resolution 5730 Event code 40 (ABS_MISC) Value 0 Min 0 Max 255 Event type 4 (EV_MSC) Event code 0 (MSC_SERIAL) Event code 5 (MSC_TIMESTAMP) Properties: Property type 1 (INPUT_PROP_DIRECT) Testing ... (interrupt to exit) ``` The touch works as expected under X11 (although there's room for improvement, hehe). **Exact steps for others to reproduce the error** Start Blender under a wayland session Try to interact with menus using a touchscreen and finger
Henrique-Alves added the
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 labels 2024-05-05 21:09:56 +02:00
Iliya Katushenock added the
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Wayland
 label 2024-05-05 21:21:35 +02:00
Pratik Borhade commented 2024-05-06 07:35:37 +02:00
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Hi, thanks for the report. I'm not aware of the touchscreen support on wayland. Didn't see any reference in #76428
cc @ideasman42

Hi, thanks for the report. I'm not aware of the touchscreen support on wayland. Didn't see any reference in #76428 cc @ideasman42
Campbell Barton commented 2024-05-06 14:54:17 +02:00
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This is probably not difficult to support, I just don't have any input devices that generate these kind of touch events.

Is it that the cursor doesn't move at all when touching? Or that tapping is ignored?

Could you run Blender with WAYLAND_DEBUG=1? this generates a large log which would be best to upload instead of paste inline.

This is probably not difficult to support, I just don't have any input devices that generate these kind of touch events. Is it that the cursor doesn't move at all when touching? Or that tapping is ignored? Could you run Blender with `WAYLAND_DEBUG=1`? this generates a large log which would be best to upload instead of paste inline.
Campbell Barton added
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 labels 2024-05-06 14:54:43 +02:00
Henrique-Alves commented 2024-05-06 16:33:39 +02:00
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Here's the log file. Touch gestures are identified, but go ignored. I have moved my finger around the screen, tapped with one finger, pinched and used three-finger swipes as well, before I used the touchpad to quit.

Here's the log file. Touch gestures are identified, but go ignored. I have moved my finger around the screen, tapped with one finger, pinched and used three-finger swipes as well, before I used the touchpad to quit.
log.txt
174 KiB
Campbell Barton added
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 labels 2024-05-08 00:53:07 +02:00
Campbell Barton commented 2024-05-08 01:03:10 +02:00
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@Henrique-Alves thanks for the info, some remaining notes.

Could you please include:

  • The exact hardware (model number) of touch screen your using.
  • The compositor & version your using.

Supporting this might involve using an exact compositor & hardware combination, I have 3 (wacom-intuos-4, apple-trackpad & laptop-style trackpad) and none use the wl_touch interface.

I've also asked on the wayland-developer mailing list to see if there are ways to simulate wl_touch.

I don't think I'll be able to work on this near term, so if someone else wants to check on supporting wl_touch check:

  • ./intern/ghost/intern/GHOST_SystemWayland.cc (touch_seat_handle_down and related functions).
  • Use pointer_handle_frame as a reference.

Otherwise I could try implement this without access to the hardware at some point and check it works using test-builds.

@Henrique-Alves thanks for the info, some remaining notes. Could you please include: - The exact hardware (model number) of touch screen your using. - The compositor & version your using. Supporting this might involve using an exact compositor & hardware combination, I have 3 (wacom-intuos-4, apple-trackpad & laptop-style trackpad) and none use the `wl_touch` interface. I've also asked on the wayland-developer mailing list to see if there are ways to simulate wl_touch. I don't think I'll be able to work on this near term, so if someone else wants to check on supporting `wl_touch` check: - `./intern/ghost/intern/GHOST_SystemWayland.cc` (`touch_seat_handle_down` and related functions). - Use `pointer_handle_frame` as a reference. Otherwise I could try implement this without access to the hardware at some point and check it works using test-builds.
Henrique-Alves commented 2024-05-08 01:59:14 +02:00
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Hello. Thank you for taking the time to look into this.

The screen I'm using is from the lenovo yoga notebook, model 13ABR8, but it is a Wacom HID 52FA which I believe it's exclusive to this laptop model. The vendor and product ids are on my first post. The compositor is mutter 44.9 from gnome, but I have also tested it in KDE6 (kwin) from a fedora live image.

Let me know if there's anything else I can help you with.

Hello. Thank you for taking the time to look into this. The screen I'm using is from the lenovo yoga notebook, model 13ABR8, but it is a Wacom HID 52FA which I believe it's exclusive to this laptop model. The vendor and product ids are on my first post. The compositor is mutter 44.9 from gnome, but I have also tested it in KDE6 (kwin) from a fedora live image. Let me know if there's anything else I can help you with.
Campbell Barton commented 2024-05-08 04:01:22 +02:00
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Update: it seems it's possible to record and reply events from libinput, Peter Hutterer kindly recorded touch input (see the attached YAML file).

I've attached the email as well for reference, so besides having to check on how to replay events, this may be all I need to add support for touch devices.

https://lists.freedesktop.org/archives/wayland-devel/2024-May/043608.html

Update: it seems it's possible to record and reply events from libinput, Peter Hutterer kindly recorded touch input (see the attached YAML file). I've attached the email as well for reference, so besides having to check on how to replay events, this may be all I need to add support for touch devices. https://lists.freedesktop.org/archives/wayland-devel/2024-May/043608.html
wl_touch_email.txt
2.2 KiB
touchscreen.yml
116 KiB
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Reference: blender/blender#121449
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