Bug 462716

Summary:	Wacom Tablet input hangup in Krita any time i alt tab
Product:	[Applications] krita	Reporter:	Mike <mikeacall2>
Component:	Tablets (tablet issues are only very rarely bugs in Krita!)	Assignee:	Krita Bugs <krita-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	halla
Priority:	NOR	Keywords:	triaged
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	preview of pen tablet input hangup

Description Mike 2022-12-06 18:36:48 UTC

Created attachment 154363 [details]
preview of pen tablet input hangup

SUMMARY
***
Wacom tablet input is working fine, and then if i alt tab, say to look at reference, and then alt tab back into Krita and start drawing again the first stroke gets stuck. It sticks where i put the pen down, but then catches up in straight line after about 2 seconds. , and won't follow or use pressure as i move my pen. If i lift my pen and start a new stroke, it then works fine.

See a post with gif here: https://www.reddit.com/r/krita/comments/yzmfam/wacom_tablet_input_hangup_in_krita_any_time_i_alt/

Here's the info from my Krita help menu:

Krita

 Version: 5.0.6
 Installation type: installer / portable package
 Languages: en_US, en
 Hidpi: true

Qt

  Version (compiled): 5.12.12
  Version (loaded): 5.12.12

OS Information

  Build ABI: x86_64-little_endian-llp64
  Build CPU: x86_64
  CPU: x86_64
  Kernel Type: winnt
  Kernel Version: 10.0.22621
  Pretty Productname: Windows 10 (10.0)
  Product Type: windows
  Product Version: 10

OpenGL Info
 
  Vendor:  "Google Inc." 
  Renderer:  "ANGLE (NVIDIA GeForce RTX 3080 Direct3D11 vs_5_0 ps_5_0)" 
  Version:  "OpenGL ES 3.0 (ANGLE 2.1.0.57ea533f79a7)" 
  Shading language:  "OpenGL ES GLSL ES 3.00 (ANGLE 2.1.0.57ea533f79a7)" 
  Requested format:  QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::CompatibilityProfile) 
  Current format:  QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) 
     Version: 3.0
     Supports deprecated functions false 
     is OpenGL ES: true 
  supportsBufferMapping: true 
  supportsBufferInvalidation: false 
  Extensions: 
     "GL_ANGLE_translated_shader_source" 
     "GL_EXT_blend_minmax" 
     "GL_EXT_unpack_subimage" 
     "GL_OES_EGL_image_external_essl3" 
     "GL_NV_fence" 
     "GL_OES_texture_float" 
     "GL_EXT_texture_compression_dxt1" 
     "GL_ANGLE_framebuffer_multisample" 
     "GL_NV_pixel_buffer_object" 
     "GL_EXT_texture_storage" 
     "GL_OES_texture_half_float_linear" 
     "GL_OES_packed_depth_stencil" 
     "GL_EXT_robustness" 
     "GL_OES_texture_float_linear" 
     "GL_OES_vertex_array_object" 
     "GL_EXT_shader_texture_lod" 
     "GL_OES_get_program_binary" 
     "GL_OES_EGL_image" 
     "GL_EXT_discard_framebuffer" 
     "GL_CHROMIUM_bind_generates_resource" 
     "GL_ANGLE_framebuffer_blit" 
     "GL_EXT_texture_compression_s3tc_srgb" 
     "GL_CHROMIUM_sync_query" 
     "GL_OES_compressed_ETC1_RGB8_texture" 
     "GL_OES_depth32" 
     "GL_ANGLE_request_extension" 
     "GL_ANGLE_multiview" 
     "GL_ANGLE_program_cache_control" 
     "GL_OES_surfaceless_context" 
     "GL_ANGLE_pack_reverse_row_order" 
     "GL_EXT_color_buffer_float" 
     "GL_NV_pack_subimage" 
     "GL_OES_texture_npot" 
     "GL_EXT_map_buffer_range" 
     "GL_OES_element_index_uint" 
     "GL_OES_standard_derivatives" 
     "GL_OES_rgb8_rgba8" 
     "GL_EXT_sRGB" 
     "GL_EXT_read_format_bgra" 
     "GL_CHROMIUM_color_buffer_float_rgba" 
     "GL_ANGLE_depth_texture" 
     "GL_ANGLE_client_arrays" 
     "GL_ANGLE_texture_usage" 
     "GL_CHROMIUM_copy_compressed_texture" 
     "GL_EXT_debug_marker" 
     "GL_EXT_texture_filter_anisotropic" 
     "GL_ANGLE_texture_compression_dxt5" 
     "GL_CHROMIUM_color_buffer_float_rgb" 
     "GL_EXT_frag_depth" 
     "GL_NV_EGL_stream_consumer_external" 
     "GL_EXT_texture_norm16" 
     "GL_EXT_occlusion_query_boolean" 
     "GL_ANGLE_robust_client_memory" 
     "" 
     "GL_ANGLE_instanced_arrays" 
     "GL_EXT_texture_format_BGRA8888" 
     "GL_ANGLE_texture_compression_dxt3" 
     "GL_CHROMIUM_copy_texture" 
     "GL_EXT_draw_buffers" 
     "GL_ANGLE_lossy_etc_decode" 
     "GL_EXT_color_buffer_half_float" 
     "GL_EXT_disjoint_timer_query" 
     "GL_KHR_debug" 
     "GL_OES_mapbuffer" 
     "GL_CHROMIUM_bind_uniform_location" 
     "GL_EXT_texture_rg" 
     "GL_OES_EGL_image_external" 
     "GL_OES_texture_half_float" 

QPA OpenGL Detection Info 
  supportsDesktopGL: true 
  supportsAngleD3D11: true 
  isQtPreferAngle: true 

useBufferInvalidation (config option): false


Hardware Information

  GPU Acceleration: auto
  Memory: 65451 Mb
  Number of Cores: 12
  Swap Location: C:/Users/mikea/AppData/Local/Temp

Current Settings

  Current Swap Location: C:/Users/mikea/AppData/Local/Temp
  Current Swap Location writable: true
  Undo Enabled: true
  Undo Stack Limit: 200
  Use OpenGL: true
  Use OpenGL Texture Buffer: true
  Disable Vector Optimizations: false
  Disable AVX Optimizations: false
  Canvas State: OPENGL_SUCCESS
  Autosave Interval: 420
  Use Backup Files: true
  Number of Backups Kept: 1
  Backup File Suffix: ~
  Backup Location: Same Folder as the File
  Backup Location writable: false
  Use Win8 Pointer Input: false
  Use RightMiddleTabletButton Workaround: false
  Levels of Detail Enabled: false
  Use Zip64: false


Display Information
Number of screens: 2
	Screen: 0
		Name: \\.\DISPLAY2
		Depth: 32
		Scale: 1
		Resolution in pixels: 2560x1440
		Manufacturer: 
		Model: 
		Refresh Rate: 59
	Screen: 1
		Name: \\.\DISPLAY1
		Depth: 32
		Scale: 1
		Resolution in pixels: 2560x1440
		Manufacturer: 
		Model: 
		Refresh Rate: 59



Windows 6.2.9200
DrMingw 0.9.4

Comment 1 Halla Rempt 2022-12-06 19:04:03 UTC

Please update to the latest version of Krita and try again. We fixed something like this quite recently.

Comment 2 Mike 2022-12-06 19:53:49 UTC

(In reply to Halla Rempt from comment #1)
> Please update to the latest version of Krita and try again. We fixed
> something like this quite recently.

Thanks for suggestion, didn't realize i was behind. I have updated to 5.1.3, but the problem persists.

Comment 3 Bug Janitor Service 2022-12-07 05:12:36 UTC

Thanks for your comment!

Automatically switching the status of this bug to REPORTED so that the KDE team
knows that the bug is ready to get confirmed.

In the future you may also do this yourself when providing needed information.

Comment 4 Halla Rempt 2022-12-08 12:11:30 UTC

Hm, from the gif I don't see the delay? But I do see that the first stroke doesn't have pressure, but that's because the click to focus krita, even when made with a stylus is always seen as a mouse click.

Comment 5 Halla Rempt 2022-12-08 12:16:20 UTC

I only managed to reproduce this once, though, and only by not using alt-tab, but by clicking on the canvas.

Comment 6 Halla Rempt 2022-12-08 12:35:51 UTC

Note: someone on IRC said "I recall that the wacom driver switches between wintab and winink only after switching window focus, that may be what's going on"

Comment 7 Mike 2022-12-08 15:26:38 UTC

(In reply to Halla Rempt from comment #4)
> Hm, from the gif I don't see the delay? But I do see that the first stroke
> doesn't have pressure, but that's because the click to focus krita, even
> when made with a stylus is always seen as a mouse click.

It's had to tell when the delay is happening, but it's the moment that the cursor stops moving, to when it snaps forward in a straight line. It's about a full second.

When i use photoshop i alt tab a lot as well, my first input with the pen tablet is not used to focus the program, but instead draws normally. Though i have seen in photoshop that if i had been using the pen before i alt-tab out, it has issues if i use the mouse instead right when i alt tab back in, and i must use the pen again first. This might be a similar issue.

Comment 8 Mike 2022-12-08 17:57:37 UTC

(In reply to Halla Rempt from comment #6)
> Note: someone on IRC said "I recall that the wacom driver switches between
> wintab and winink only after switching window focus, that may be what's
> going on"

I'm not sure i understand what this means. Is it something i can change to help resolve the problem?