Created attachment 188606 [details] flicker on Hi everyone, I’ve had some issues where when turning on guides or grids or setting two parallel rulers perpendicular to each other will cause the brush shape to flicker. It will also follow the brush. I've attached some screenshots of the flickering when the brush is static and when the brush is moving, for frames where the flicker frame is on and off. I've attached a screenshot but there are more on the thread I made on the krita-artists forum: https://krita-artists.org/t/flickering-brush-when-using-rulers-or-guides/159635 The selected brush is an airbrush. However, the same glitch occurs no matter which brush is selected. Here’s a video of the flickering (Proton Drive link: https://drive.proton.me/urls/80243NK1BR#agE0unKHLzoz). Krita version: 5.2.14 (flatpak) Operating System: Debian 13.2 XFCE I did open up the 5.2.14 AppImage version of Krita and the problem isn’t there. So whatever the issue is seems related to the flatpak version. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Linux Debian 13.2 XFCE From Krita System Information: Krita Version: 5.2.14 Hidpi: true Qt Version (compiled): 5.15.7 Version (loaded): 5.15.7 OS Information Build ABI: x86_64-little_endian-lp64 Build CPU: x86_64 CPU: x86_64 Kernel Type: linux Kernel Version: 6.12.57+deb13-amd64 Pretty Productname: Freedesktop SDK 25.08 (Flatpak runtime) Product Type: org.freedesktop.platform Product Version: 25.08 Desktop: XFCE Appimage build: No Locale Languages: en_AU, en_Latn_AU, en, en_US, en_Latn_US C locale: en_AU.UTF-8 QLocale current: en-AU QLocale system: en-AU QTextCodec for locale: UTF-8 OpenGL Info Vendor: "Mesa" Renderer: "zink Vulkan 1.4(NVIDIA GeForce RTX 3060 Laptop GPU (NVK GA106) (MESA_NVK))" Driver version: "4.6 (Core Profile) Mesa 25.2.6 (git-3f12436d80)" Shading language: "4.60" Requested format: QSurfaceFormat(version 3.3, options QFlags<QSurfaceFormat::FormatOption>(), 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 4.6, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile QSurfaceFormat::CoreProfile) GL version: 4.6 Supports deprecated functions false Is OpenGL ES: false supportsBufferMapping: true supportsBufferInvalidation: true forceDisableTextureBuffers: false Extensions: GL_AMD_performance_monitor GL_EXT_framebuffer_object GL_ARB_fragment_layer_viewport GL_ARB_texture_view GL_EXT_memory_object_fd GL_EXT_EGL_sync GL_EXT_framebuffer_sRGB GL_EXT_semaphore_fd GL_ARB_sparse_buffer GL_OVR_multiview_multisampled_render_to_texture GL_NV_shader_atomic_int64 GL_ARB_texture_mirror_clamp_to_edge GL_ARB_multi_bind GL_ARB_sample_shading GL_ARB_map_buffer_range GL_ARB_clear_buffer_object GL_ARB_shading_language_include GL_EXT_texture_compression_dxt1 GL_EXT_texture_sRGB_R8 GL_NV_packed_depth_stencil GL_EXT_texture_compression_rgtc GL_ARB_multi_draw_indirect GL_ARB_arrays_of_arrays GL_ARB_clear_texture GL_ARB_texture_rg GL_ARB_texture_rgb10_a2ui GL_ARB_shader_storage_buffer_object GL_ANGLE_texture_compression_dxt3 GL_EXT_blend_equation_separate GL_ARB_sampler_objects GL_AMD_vertex_shader_layer GL_ANGLE_texture_compression_dxt5 GL_ARB_shader_atomic_counter_ops GL_ARB_separate_shader_objects GL_ARB_gpu_shader5 GL_EXT_packed_float GL_ARB_robustness GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_clip_control GL_IBM_multimode_draw_arrays GL_ARB_shader_atomic_counters GL_ARB_timer_query GL_ARB_ES2_compatibility GL_EXT_texture_snorm GL_ARB_shader_draw_parameters GL_ARB_gpu_shader_fp64 GL_ARB_cull_distance GL_ARB_depth_clamp GL_ARB_get_program_binary GL_ARB_parallel_shader_compile GL_ATI_blend_equation_separate GL_EXT_EGL_image_storage_compression GL_EXT_semaphore GL_AMD_vertex_shader_viewport_index GL_ARB_vertex_array_object GL_ARB_shading_language_packing GL_ARB_sample_locations GL_NV_compute_shader_derivatives GL_KHR_debug GL_KHR_texture_compression_astc_ldr GL_ARB_copy_image GL_ARB_post_depth_coverage GL_ARB_seamless_cubemap_per_texture GL_EXT_depth_bounds_test GL_KHR_robustness GL_ARB_shader_subroutine GL_AMD_multi_draw_indirect GL_ARB_ES3_2_compatibility GL_EXT_vertex_array_bgra GL_ARB_shader_texture_image_samples GL_ARB_texture_barrier GL_EXT_texture_filter_anisotropic GL_EXT_framebuffer_multisample GL_KHR_no_error GL_ARB_sparse_texture2 GL_ARB_ES3_1_compatibility GL_ARB_blend_func_extended GL_EXT_polygon_offset_clamp GL_ARB_sync GL_ARB_query_buffer_object GL_EXT_framebuffer_multisample_blit_scaled GL_ARB_shader_image_load_store GL_NV_conditional_render GL_EXT_packed_depth_stencil GL_ARB_shader_precision GL_KHR_shader_subgroup GL_ARB_invalidate_subdata GL_ARB_conservative_depth GL_ARB_framebuffer_no_attachments GL_ARB_buffer_storage GL_ARB_texture_query_lod GL_EXT_abgr GL_ARB_spirv_extensions GL_ARB_shader_bit_encoding GL_ARB_transform_feedback_instanced GL_NV_depth_clamp GL_ARB_explicit_uniform_location GL_ATI_meminfo GL_KHR_blend_equation_advanced GL_ARB_transform_feedback3 GL_EXT_provoking_vertex GL_ARB_fragment_shader GL_ARB_shader_image_size GL_EXT_shader_integer_mix GL_ARB_texture_cube_map_array GL_ARB_pipeline_statistics_query GL_ARB_texture_multisample GL_ARB_robust_buffer_access_behavior GL_ARB_texture_storage_multisample GL_EXT_texture_shared_exponent GL_ARB_stencil_texturing GL_ARB_get_texture_sub_image GL_ARB_shader_objects GL_ARB_sparse_texture_clamp GL_ARB_occlusion_query2 GL_ARB_polygon_offset_clamp GL_EXT_draw_instanced GL_EXT_texture_storage GL_ARB_texture_non_power_of_two GL_ARB_compressed_texture_pixel_storage GL_MESA_framebuffer_flip_y GL_ARB_instanced_arrays GL_ARB_texture_query_levels GL_NV_sample_locations GL_ARB_seamless_cube_map GL_ARB_gl_spirv GL_ARB_texture_float GL_EXT_transform_feedback GL_ARB_texture_filter_anisotropic GL_EXT_texture_compression_s3tc GL_ARB_compute_variable_group_size GL_ARB_conditional_render_inverted GL_NVX_gpu_memory_info GL_ARB_base_instance GL_ARB_transform_feedback_overflow_query GL_KHR_robust_buffer_access_behavior GL_ARB_texture_storage GL_S3_s3tc GL_EXT_pixel_buffer_object GL_ARB_texture_buffer_object_rgb32 GL_KHR_parallel_shader_compile GL_ARB_pixel_buffer_object GL_KHR_context_flush_control GL_ARB_internalformat_query GL_OES_EGL_image GL_ARB_texture_buffer_range GL_ARB_fragment_coord_conventions GL_NV_texture_barrier GL_NV_timeline_semaphore GL_ARB_bindless_texture GL_EXT_demote_to_helper_invocation GL_ARB_tessellation_shader GL_ARB_vertex_attrib_64bit GL_ARB_transform_feedback2 GL_EXT_debug_label GL_ARB_texture_buffer_object GL_ARB_shading_language_420pack GL_ARB_draw_instanced GL_EXT_draw_buffers2 GL_ARB_gpu_shader_int64 GL_EXT_shader_image_load_formatted GL_ARB_draw_buffers GL_EXT_framebuffer_blit GL_ARB_program_interface_query GL_OVR_multiview2 GL_ARB_shader_texture_lod GL_EXT_timer_query GL_ARB_shader_viewport_layer_array GL_ARB_direct_state_access GL_ARB_viewport_array GL_EXT_texture_integer GL_ARB_vertex_type_10f_11f_11f_rev GL_AMD_texture_texture4 GL_ATI_texture_float GL_MESA_pack_invert GL_EXT_texture_array GL_AMD_shader_trinary_minmax GL_ARB_provoking_vertex GL_ARB_sparse_texture GL_ARB_texture_rectangle GL_EXT_texture_swizzle GL_ARB_texture_gather GL_ARB_half_float_vertex GL_ARB_texture_compression_rgtc GL_EXT_shader_clock GL_ARB_shader_ballot GL_ARB_shader_group_vote GL_EXT_texture_sRGB GL_ARB_vertex_attrib_binding GL_ARB_map_buffer_alignment GL_AMD_seamless_cubemap_per_texture GL_ARB_vertex_shader GL_EXT_texture_sRGB_decode GL_ARB_framebuffer_sRGB GL_ARB_texture_border_clamp GL_ARB_texture_swizzle GL_KHR_texture_compression_astc_sliced_3d GL_ARB_framebuffer_object GL_ARB_internalformat_query2 GL_ARB_enhanced_layouts GL_ARB_draw_indirect GL_ARB_uniform_buffer_object GL_AMD_gpu_shader_int64 GL_ARB_draw_buffers_blend GL_ARB_indirect_parameters GL_NV_copy_image GL_ARB_draw_elements_base_vertex GL_ARB_point_sprite GL_ARB_shader_clock GL_OVR_multiview GL_ARB_derivative_control GL_ARB_half_float_pixel GL_AMD_query_buffer_object GL_AMD_conservative_depth GL_MESA_shader_integer_functions GL_ARB_copy_buffer GL_AMD_draw_buffers_blend GL_ARB_explicit_attrib_location GL_ARB_vertex_buffer_object GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_ES3_compatibility GL_ARB_texture_filter_minmax GL_MESA_texture_signed_rgba GL_EXT_memory_object GL_ARB_vertex_array_bgra GL_ARB_compute_shader GL_ARB_texture_stencil8 GL_EXT_EGL_image_storage GL_EXT_vertex_attrib_64bit GL_ARB_texture_compression_bptc QPA OpenGL Detection Info supportsDesktopGL: true supportsOpenGLES: true isQtPreferOpenGLES: false Detected renderers: (Supported) zink Vulkan 1.4(NVIDIA GeForce RTX 3060 Laptop GPU (NVK GA106) (MESA_NVK)) (OpenGL ES 3.2 Mesa 25.2.6 (git-3f12436d80)) (Supported) zink Vulkan 1.4(NVIDIA GeForce RTX 3060 Laptop GPU (NVK GA106) (MESA_NVK)) (4.6 (Core Profile) Mesa 25.2.6 (git-3f12436d80)) useBufferInvalidation (config option): false Hardware Information GPU Acceleration: auto Memory: 15849 Mb Number of Cores: 12 Swap Location: /var/tmp Built for: sse2 Base instruction set: fma3+avx2 Supported instruction sets: fma3+avx2 avx2 fma3+avx avx fma3+sse4.2 sse4.2 sse4.1 ssse3 sse3 sse2 Current Settings Current Swap Location: /var/tmp 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 Resource Location: /home/travis/.var/app/org.kde.krita/data/krita Use Win8 Pointer Input: false Use RightMiddleTabletButton Workaround: false Levels of Detail Enabled: true Use Zip64: false Loaded Python Plugins colorspace comics_project_management_tools documenttools exportlayers filtermanager lastdocumentsdocker plugin_importer quick_settings_docker scripter tenbrushes tenscripts Display Information Number of screens: 1 Screen: 0 Name: HDMI-1 Depth: 24 Scale: 1 Physical DPI92.6073 Logical DPI96 Physical Size: 527, 296 Position: 0, 0 Resolution in pixels: 1920x1080 Manufacturer: Dell Inc. Model: DELL SE2425HM Refresh Rate: 60 Serial Number: GG5DT94