OBS segfault at start

[siscia]

Operating System Info

Ubuntu 22.04

Other OS

No response

OBS Studio Version

28.1.2

OBS Studio Version (Other)

No response

OBS Studio Log URL

Unable

OBS Studio Crash Log URL

Unable

Expected Behavior

OBS should start.

Current Behavior

OBS does not start, and it crashes just after loading the scenes.

Steps to Reproduce

1. Start OBS

Anything else we should know?

Logs from terminal:

simo@simo-ThinkBook-13s-G2-ITL:~$ obs --debug --verbose
debug: Found portal inhibitor
Attempted path: share/obs/obs-studio/locale/en-US.ini
Attempted path: /usr/share/obs/obs-studio/locale/en-US.ini
Attempted path: share/obs/obs-studio/locale.ini
Attempted path: /usr/share/obs/obs-studio/locale.ini
Attempted path: share/obs/obs-studio/themes/Yami.qss
Attempted path: /usr/share/obs/obs-studio/themes/Yami.qss
info: Command Line Arguments: --debug --verbose
info: Platform: Wayland
info: CPU Name: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
info: CPU Speed: 2400.000MHz
info: Physical Cores: 4, Logical Cores: 8
info: Physical Memory: 15551MB Total, 10519MB Free
info: Kernel Version: Linux 5.15.0-56-generic
info: Distribution: "Ubuntu" "22.04"
info: Session Type: wayland
info: Qt Version: 6.2.4 (runtime), 6.2.4 (compiled)
info: Portable mode: false
Attempted path: share/obs/obs-studio/themes/Dark/no_sources.svg
Attempted path: /usr/share/obs/obs-studio/themes/Dark/no_sources.svg
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_tbar_position_valueChanged(int)
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_actionShowTransitionProperties_triggered()
qt.core.qmetaobject.connectslotsbyname: QMetaObject::connectSlotsByName: No matching signal for on_actionHideTransitionProperties_triggered()
info: OBS 28.1.2 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
	samples per sec: 48000
	speakers:        2
	max buffering:   960 milliseconds
	buffering type:  dynamically increasing
info: ---------------------------------
info: Initializing OpenGL...
info: Using EGL/Wayland
info: Initialized EGL 1.5
debug: Supported EGL Extensions: EGL_ANDROID_blob_cache EGL_ANDROID_native_fence_sync EGL_EXT_buffer_age EGL_EXT_create_context_robustness EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_EXT_present_opaque EGL_EXT_swap_buffers_with_damage EGL_IMG_context_priority EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image_base EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_KHR_swap_buffers_with_damage EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_MESA_query_driver EGL_WL_bind_wayland_display EGL_WL_create_wayland_buffer_from_image 
info: Loading up OpenGL on adapter Intel Mesa Intel(R) Xe Graphics (TGL GT2)
info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 22.0.5, shading language 4.60
info: ---------------------------------
info: video settings reset:
	base resolution:   1920x1080
	output resolution: 1920x1080
	downscale filter:  Bicubic
	fps:               30/1
	format:            NV12
	YUV mode:          Rec. 709/Partial
info: NV12 texture support not available
info: P010 texture support not available
info: Audio monitoring device:
	name: Default
	id: default
info: ---------------------------------
debug: ---------------------------------
debug: Loading module: aja-output-ui.so
warning: No AJA devices found, skipping loading AJA UI plugin
warning: Failed to initialize module 'aja-output-ui.so'
debug: ---------------------------------
debug: Loading module: aja.so
warning: No AJA devices found, skipping loading AJA plugin
warning: Failed to initialize module 'aja.so'
debug: ---------------------------------
debug: Loading module: decklink-captions.so
warning: Failed to load 'en-US' text for module: 'decklink-captions.so'
debug: ---------------------------------
debug: Loading module: decklink-output-ui.so
warning: Failed to load 'en-US' text for module: 'decklink-output-ui.so'
debug: ---------------------------------
debug: Loading module: decklink.so
libDeckLinkAPI.so: cannot open shared object file: No such file or directory
warning: A DeckLink iterator could not be created.  The DeckLink drivers may not be installed
warning: Failed to initialize module 'decklink.so'
debug: ---------------------------------
debug: Loading module: frontend-tools.so
debug: ---------------------------------
debug: Loading module: image-source.so
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libcef.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libcef.so', not an OBS plugin
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libEGL.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libEGL.so', not an OBS plugin
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libGLESv2.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libGLESv2.so', not an OBS plugin
debug: ---------------------------------
debug: Required module function 'obs_module_load' in module '/usr//lib/x86_64-linux-gnu/obs-plugins/libvk_swiftshader.so' not found, loading of module failed
debug: Failed to load module file '/usr//lib/x86_64-linux-gnu/obs-plugins/libvk_swiftshader.so', not an OBS plugin
debug: ---------------------------------
debug: Loading module: linux-alsa.so
debug: ---------------------------------
debug: Loading module: linux-capture.so
debug: ---------------------------------
debug: Loading module: linux-jack.so
debug: ---------------------------------
debug: Loading module: linux-pipewire.so
info: [pipewire] Available captures:
info: [pipewire]     - Desktop capture
info: [pipewire]     - Window capture
debug: ---------------------------------
debug: Loading module: linux-pulseaudio.so
debug: ---------------------------------
debug: Loading module: linux-v4l2.so
debug: ---------------------------------
debug: Loading module: obs-browser.so
info: [obs-browser]: Version 2.18.7
info: [obs-browser]: CEF Version 103.0.5060.134 (runtime), 103.0.0-5060-shared-textures_143.2591+g4204d54+chromium-103.0.5060.134 (compiled)
debug: ---------------------------------
debug: Loading module: obs-ffmpeg.so
info: FFMPEG VAAPI supported
debug: ---------------------------------
debug: Loading module: obs-filters.so
debug: ---------------------------------
debug: Loading module: obs-libfdk.so
debug: ---------------------------------
debug: Loading module: obs-outputs.so
debug: ---------------------------------
debug: Loading module: obs-transitions.so
debug: ---------------------------------
debug: Loading module: obs-vst.so
debug: ---------------------------------
debug: Loading module: obs-websocket.so
info: [obs-websocket] [obs_module_load] you can haz websockets (Version: 5.0.1 | RPC Version: 1)
info: [obs-websocket] [obs_module_load] Qt version (compile-time): 6.2.4 | Qt version (run-time): 6.2.4
info: [obs-websocket] [obs_module_load] Linked ASIO Version: 101201
info: [obs-websocket] [obs_module_load] Module loaded.
debug: ---------------------------------
debug: Loading module: obs-x264.so
debug: ---------------------------------
debug: Loading module: rtmp-services.so
debug: ---------------------------------
debug: Loading module: text-freetype2.so
debug: ---------------------------------
debug: Loading module: vlc-video.so
error: os_dlopen(libvlc.so.5->libvlc.so.5): libvlc.so.5: cannot open shared object file: No such file or directory

info: [vlc-video]: Couldn't find VLC installation, VLC video source disabled
info: ---------------------------------
info:   Loaded Modules:
info:     vlc-video.so
info:     text-freetype2.so
info:     rtmp-services.so
info:     obs-x264.so
info:     obs-websocket.so
info:     obs-vst.so
info:     obs-transitions.so
info:     obs-outputs.so
info:     obs-libfdk.so
info:     obs-filters.so
info:     obs-ffmpeg.so
info:     obs-browser.so
info:     linux-v4l2.so
info:     linux-pulseaudio.so
info:     linux-pipewire.so
info:     linux-jack.so
info:     linux-capture.so
info:     linux-alsa.so
info:     image-source.so
info:     frontend-tools.so
info:     decklink-output-ui.so
info:     decklink-captions.so
info: ---------------------------------
QLayout: Attempting to add QLayout "" to OBSBasic "OBSBasic", which already has a layout
QWidget::setTabOrder: 'first' and 'second' must be in the same window
info: ==== Startup complete ===============================================
debug: output 'virtualcam_output' (virtualcam_output) created
debug: encoder 'simple_video_stream' (obs_x264) created
debug: AAC encoder bitrate mapping:
	 32 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	 64 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	 96 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	128 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	160 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	192 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	224 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	256 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	288 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	320 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	352 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	384 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	416 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	448 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	480 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	512 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	544 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	576 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	608 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	640 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	672 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	704 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	736 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	768 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	800 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	832 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	864 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	896 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	928 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	960 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	992 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
	1024 kbit/s: 'libfdk AAC Encoder' (libfdk_aac)
debug: encoder 'simple_aac' (libfdk_aac) created
debug: encoder 'simple_archive_aac' (libfdk_aac) created
debug: encoder 'simple_video_recording' (obs_x264) created
debug: encoder 'simple_aac_recording' (libfdk_aac) created
debug: output 'simple_file_output' (ffmpeg_muxer) created
debug: service 'default_service' (rtmp_common) created
info: All scene data cleared
info: ------------------------------------------------
debug: private source 'Cut' (cut_transition) created
debug: private source 'Fade' (fade_transition) created
info: pulse-input: Server name: 'pulseaudio 15.99.1'
debug: pulse-input: Default output device: 'alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp_3__sink.monitor'
info: pulse-input: Audio format: s16le, 48000 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp_3__sink.monitor' (default)
debug: source 'Desktop Audio' (pulse_output_capture) created
info: [Loaded global audio device]: 'Desktop Audio'
info: pulse-input: Server name: 'pulseaudio 15.99.1'
debug: pulse-input: Default input device: 'alsa_input.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp_6__source'
info: pulse-input: Audio format: s16le, 48000 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_input.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp_6__source' (default)
debug: source 'Mic/Aux' (pulse_input_capture) created
info: [Loaded global audio device]: 'Mic/Aux'
info: v4l2-input: Start capture from /dev/video0
info: v4l2-input: Input: 0
info: v4l2-input: Resolution: 1280x720
info: v4l2-input: Pixelformat: MJPG
info: v4l2-input: Linesize: 0 Bytes
info: v4l2-input: Framerate: 30.00 fps
debug: v4l2-input: decoder: initialized avcodec
debug: source 'Video Capture Device (V4L2)' (v4l2_input) created
debug: v4l2-input: /dev/video0: new capture thread
debug: v4l2-input: /dev/video0: framerate: 30.00 fps
info: v4l2-input: /dev/video0: select timeout set to 166666 (5x frame periods)
debug: private source 'Image Mask/Blend' (mask_filter_v2) created
debug: - filter 'Image Mask/Blend' (mask_filter_v2) added to source 'Video Capture Device (V4L2)'
debug: private source 'Crop/Pad' (crop_filter) created
debug: - filter 'Crop/Pad' (crop_filter) added to source 'Video Capture Device (V4L2)'
info: PipeWire initialized
debug: source 'Screen Capture (PipeWire)' (pipewire-desktop-capture-source) created
debug: source 'Scene' (scene) created
info: Switched to scene 'Scene'
info: ------------------------------------------------
info: Loaded scenes:
info: - scene 'Scene':
info:     - source: 'Screen Capture (PipeWire)' (pipewire-desktop-capture-source)
info:     - source: 'Video Capture Device (V4L2)' (v4l2_input)
info:         - filter: 'Image Mask/Blend' (mask_filter_v2)
info:         - filter: 'Crop/Pad' (crop_filter)
info: ------------------------------------------------
Segmentation fault (core dumped)

[kkartaltepe]

Provide a backtrace from gdb.

[siscia]

Unfortunately it is not very useful:

info: ------------------------------------------------
info: Loaded scenes:
info: - scene 'Scene':
info:     - source: 'Screen Capture (PipeWire)' (pipewire-desktop-capture-source)
info:     - source: 'Video Capture Device (V4L2)' (v4l2_input)
info:         - filter: 'Image Mask/Blend' (mask_filter_v2)
info:         - filter: 'Crop/Pad' (crop_filter)
info: ------------------------------------------------

Thread 1 "obs" received signal SIGSEGV, Segmentation fault.
0x00007ffff4f8fcd4 in QScreen::geometry() const () from /usr/lib/x86_64-linux-gnu/libQt6Gui.so.6
(gdb) bt
#0  0x00007ffff4f8fcd4 in QScreen::geometry() const () from /usr/lib/x86_64-linux-gnu/libQt6Gui.so.6
#1  0x00007ffff5b54bfa in ?? () from /usr/lib/x86_64-linux-gnu/libQt6Widgets.so.6
#2  0x00007ffff5b5e820 in ?? () from /usr/lib/x86_64-linux-gnu/libQt6Widgets.so.6
#3  0x00007ffff5b5e9d8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt6Widgets.so.6
#4  0x00007ffff5b9adb5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt6Widgets.so.6
#5  0x00007ffff5b9b00c in ?? () from /usr/lib/x86_64-linux-gnu/libQt6Widgets.so.6
#6  0x00007ffff5b8d5d9 in QMainWindow::restoreState(QByteArray const&, int) () from /usr/lib/x86_64-linux-gnu/libQt6Widgets.so.6
#7  0x0000555555696d6d in ?? ()
#8  0x0000555555602ff0 in main ()
(gdb) gcore
warning: Memory read failed for corefile section, 4096 bytes at 0xffffffffff600000.
Saved corefile core.14580

The core dump is too big to be uploaded here, I can provide over email if needed.

[kkartaltepe]

This is not our bug, please uninstall broken qt themes such as qt5ct.

[siscia]

Thanks, I appreciated the tip.

However, I don't recall having ever installed a QT theme. As a matter of fact I was even not aware that those were a thing.

If you have any suggestion on how to list those themes and how to remove them, it would be appreciated.

Best regards,

[siscia]

It actually looks much more like this: #7284

I solved the issue by deleting the same line suggested in that thread: DockState

[Atkelar]

Had the same issue here with Linux Mint, fresh install from two weeks ago, all libraries and modules current and up to date. Was worried that I had to remove my nvidia drivers (which are needed for DaVinci Resolve) and deleting the "DockState" in the ini file helped. Somehow this seems to be a bug in the config to me...

[Glitch-Artist]

Had the same issue here with Linux Mint, fresh install from two weeks ago, all libraries and modules current and up to date. Was worried that I had to remove my nvidia drivers (which are needed for DaVinci Resolve) and deleting the "DockState" in the ini file helped. Somehow this seems to be a bug in the config to me...

thank you thank you thank you thank you thank you
I've been surfing the web for 4 days straight 9 hours at a time. And at long last, you solved my issue!
I can't thank you enough for ending my misery