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obsproject / obs-studio

OBS Studio - Free and open source software for live streaming and screen recording
https://obsproject.com
GNU General Public License v2.0
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OBS 29 linux crash segmentation fault on startup #8056

Closed disinfectantinjector closed 1 year ago

disinfectantinjector commented 1 year ago

Operating System Info

Other

Other OS

Arch Linux

OBS Studio Version

29.0.0

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/1VlKYHlDMLWUG60B

OBS Studio Crash Log URL

https://obsproject.com/logs/1VlKYHlDMLWUG60B

Expected Behavior

Expected obs to startup normally

Current Behavior

obs startup fails with error Segmentation fault (core dumped)

Steps to Reproduce

  1. Start obs from terminal
  2. obs crashes with error Segmentation fault (core dumped)

Anything else we should know?

Downgrading to obs-studio 28.1.2-2 fixes the issue and obs starts normally.

Arch Linux package versions obs-studio 29.0.0-1 linux 6.1.5.arch1-1 nvidia 525.78.01-3 qt6-base 6.4.2-1 libva-vdpau-driver-chromium 0.7.4-8

Full crash log:

$ obs
debug: Found portal inhibitor
debug: Attempted path: share/obs/obs-studio/locale/en-US.ini
debug: Attempted path: /usr/share/obs/obs-studio/locale/en-US.ini
debug: Attempted path: share/obs/obs-studio/locale.ini
debug: Attempted path: /usr/share/obs/obs-studio/locale.ini
debug: Attempted path: share/obs/obs-studio/themes/Dark.qss
debug: Attempted path: /usr/share/obs/obs-studio/themes/Dark.qss
info: Using EGL/X11
info: CPU Name: AMD Ryzen 5 3600 6-Core Processor
info: CPU Speed: 4067.046MHz
info: Physical Cores: 6, Logical Cores: 12
info: Physical Memory: 32046MB Total, 23802MB Free
info: Kernel Version: Linux 6.1.5-arch1-1
info: Distribution: "Arch Linux" Unknown
info: Session Type: x11
info: Window System: X11.0, Vendor: The X.Org Foundation, Version: 1.21.1
info: Qt Version: 6.4.2 (runtime), 6.4.2 (compiled)
info: Portable mode: false
info: OBS 29.0.0-1 (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: Loading up OpenGL on adapter NVIDIA Corporation NVIDIA GeForce GTX 1060 
6GB/PCIe/SSE2
info: OpenGL loaded successfully, version 3.3.0 NVIDIA 525.78.01, shading 
language 3.30 NVIDIA via Cg compiler
info: ---------------------------------
info: video settings reset:
        base resolution:   3840x2160
        output resolution: 3840x2160
        downscale filter:  Lanczos
        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: ---------------------------------
warning: Failed to load 'en-US' text for module: 'decklink-captions.so'
warning: Failed to load 'en-US' text for module: 'decklink-output-ui.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'
info: [pipewire] Available captures:
info: [pipewire]     - Desktop capture
info: [pipewire]     - Window capture
warning: v4l2loopback not installed, virtual camera disabled
info: NVENC supported
Segmentation fault (core dumped)

Backtrace

           PID: 2209 (obs)
           UID: 1000 (user)
           GID: 1000 (user)
        Signal: 11 (SEGV)
     Timestamp: Thu 2023-01-12 12:25:18 EST (5h 33min ago)
  Command Line: obs
    Executable: /usr/bin/obs
 Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-kscreen@autostart.service
          Unit: user@1000.service
     User Unit: app-kscreen@autostart.service
         Slice: user-1000.slice
     Owner UID: 1000 (user)
       Boot ID: 73252bca57e14790b054bf6befcab693
    Machine ID: 102328bf726a468f80bbc31305b6e509
      Hostname: tomato
       Storage: /var/lib/systemd/coredump/core.obs.1000.73252bca57e14790b054bf6befcab693.2209.1673544318000000.zst (present)
  Size on Disk: 7.0M
       Message: Process 2209 (obs) of user 1000 dumped core.

                Stack trace of thread 2209:
                #0  0x00007f0d46dab8c4 XDisplayString (libX11.so.6 + 0x2b8c4)
                #1  0x00007f0d0d004c17 __vaDriverInit_1_10 (nvidia_drv_video.so + 0x6c17)
                #2  0x00007f0d46ee79c3 n/a (libva.so.2 + 0x39c3)
                #3  0x00007f0d46eeacd0 vaInitialize (libva.so.2 + 0x6cd0)
                #4  0x00007f0d0d0e9b76 vaapi_open_device (obs-ffmpeg.so + 0x16b76)
                #5  0x00007f0d0d0ea124 vaapi_device_h264_supported (obs-ffmpeg.so + 0x17124)
                #6  0x00007f0d0d0ea1f9 vaapi_get_h264_default_device (obs-ffmpeg.so + 0x171f9)
                #7  0x00007f0d0d0e6384 obs_module_load (obs-ffmpeg.so + 0x13384)
                #8  0x00007f0d547ed64e obs_init_module (libobs.so.0 + 0x5164e)
                #9  0x00007f0d547edb5f n/a (libobs.so.0 + 0x51b5f)
                #10 0x00007f0d547ee069 obs_find_modules2 (libobs.so.0 + 0x52069)
                #11 0x00007f0d547ee76d obs_load_all_modules2 (libobs.so.0 + 0x5276d)
                #12 0x0000563f81b4b5ed n/a (obs + 0x1255ed)
                #13 0x0000563f81ab0ca8 main (obs + 0x8aca8)
                #14 0x00007f0d53477290 n/a (libc.so.6 + 0x23290)
                #15 0x00007f0d5347734a __libc_start_main (libc.so.6 + 0x2334a)
                #16 0x0000563f81ab2635 n/a (obs + 0x8c635)

                Stack trace of thread 2212:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d51e3bbef n/a (libglib-2.0.so.0 + 0xacbef)
                #2  0x00007f0d51de3132 g_main_context_iteration (libglib-2.0.so.0 + 0x54132)
                #3  0x00007f0d51de3182 n/a (libglib-2.0.so.0 + 0x54182)
                #4  0x00007f0d51e11e05 n/a (libglib-2.0.so.0 + 0x82e05)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2214:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534d9fd4 pthread_cond_timedwait (libc.so.6 + 0x85fd4)
                #2  0x00007f0d548509ba os_event_timedwait (libobs.so.0 + 0xb49ba)
                #3  0x00007f0d547e6185 obs_hotkey_thread (libobs.so.0 + 0x4a185)
                #4  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #5  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2216:
                #0  0x00007f0d535217c5 clock_nanosleep (libc.so.6 + 0xcd7c5)
                #1  0x00007f0d535262d7 __nanosleep (libc.so.6 + 0xd22d7)
                #2  0x00007f0d53552179 usleep (libc.so.6 + 0xfe179)
                #3  0x00007f0d54850e49 os_sleepto_ns_fast (libobs.so.0 + 0xb4e49)
                #4  0x00007f0d5483aaaa n/a (libobs.so.0 + 0x9eaaa)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2215:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534e26a0 n/a (libc.so.6 + 0x8e6a0)
                #2  0x00007f0d5484f2c3 n/a (libobs.so.0 + 0xb32c3)
                #3  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #4  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2217:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534e26a0 n/a (libc.so.6 + 0x8e6a0)
                #2  0x00007f0d5483ac78 n/a (libobs.so.0 + 0x9ec78)
                #3  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #4  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2223:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534e26a0 n/a (libc.so.6 + 0x8e6a0)
                #2  0x00007f0d300913e6 n/a (libobs-scripting.so.1 + 0x63e6)
                #3  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #4  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2213:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d51e3bbef n/a (libglib-2.0.so.0 + 0xacbef)
                #2  0x00007f0d51de3ddf g_main_loop_run (libglib-2.0.so.0 + 0x54ddf)
                #3  0x00007f0d463fcadc n/a (libgio-2.0.so.0 + 0x10aadc)
                #4  0x00007f0d51e11e05 n/a (libglib-2.0.so.0 + 0x82e05)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2211:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d51e3bbef n/a (libglib-2.0.so.0 + 0xacbef)
                #2  0x00007f0d51de3132 g_main_context_iteration (libglib-2.0.so.0 + 0x54132)
                #3  0x00007f0d53d10382 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x34d382)
                #4  0x00007f0d53af8604 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x135604)
                #5  0x00007f0d53be0778 _ZN7QThread4execEv (libQt6Core.so.6 + 0x21d778)
                #6  0x00007f0d461f811f n/a (libQt6DBus.so.6 + 0x2d11f)
                #7  0x00007f0d53c48a21 n/a (libQt6Core.so.6 + 0x285a21)
                #8  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #9  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2210:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d4652226b n/a (libxcb.so.1 + 0xd26b)
                #2  0x00007f0d46523d1d xcb_wait_for_event (libxcb.so.1 + 0xed1d)
                #3  0x00007f0d42718362 n/a (libQt6XcbQpa.so.6 + 0x4e362)
                #4  0x00007f0d53c48a21 n/a (libQt6Core.so.6 + 0x285a21)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2218:
                #0  0x00007f0d535217c5 clock_nanosleep (libc.so.6 + 0xcd7c5)
                #1  0x00007f0d535262d7 __nanosleep (libc.so.6 + 0xd22d7)
                #2  0x00007f0d54850dd5 os_sleepto_ns (libobs.so.0 + 0xb4dd5)
                #3  0x00007f0d5481f34b obs_graphics_thread_loop (libobs.so.0 + 0x8334b)
                #4  0x00007f0d54820969 obs_graphics_thread (libobs.so.0 + 0x84969)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)
                ELF object binary architecture: AMD x86-64
tytan652 commented 1 year ago

If I had to guess without backtrace, uninstall libva-vdpau-driver.

tonkku107 commented 1 year ago

Won't fix? That package is required for some other hardware acceleration, this shouldn't be an acceptable solution. It's also a regression in obs 29 as it does not occur on obs 28.

derrod commented 1 year ago

It's a third-party package we do not directly support anyway. And without a backtrace we cannot help you.

tytan652 commented 1 year ago

Won't fix?

If my guess is right, the issue is not on OBS Side but on this driver.

That package is required for some other hardware acceleration

Edit:

It's also a regression in obs 29 as it does not occur on obs 28.

In 29 we improved VAAPI H264 enablement, and this driver happen to cause this segfault. This improvement just revealed an issue in this driver.

disinfectantinjector commented 1 year ago

Installing https://github.com/elFarto/nvidia-vaapi-driver/ and removing libva-vdpau-driver-chromium fixes the issue, and now obs 29.0.0 starts up normally.

Here's a backtrace in case it's useful.

           PID: 2209 (obs)
           UID: 1000 (user)
           GID: 1000 (user)
        Signal: 11 (SEGV)
     Timestamp: Thu 2023-01-12 12:25:18 EST (5h 33min ago)
  Command Line: obs
    Executable: /usr/bin/obs
 Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-kscreen@autostart.service
          Unit: user@1000.service
     User Unit: app-kscreen@autostart.service
         Slice: user-1000.slice
     Owner UID: 1000 (user)
       Boot ID: 73252bca57e14790b054bf6befcab693
    Machine ID: 102328bf726a468f80bbc31305b6e509
      Hostname: tomato
       Storage: /var/lib/systemd/coredump/core.obs.1000.73252bca57e14790b054bf6befcab693.2209.1673544318000000.zst (present)
  Size on Disk: 7.0M
       Message: Process 2209 (obs) of user 1000 dumped core.

                Stack trace of thread 2209:
                #0  0x00007f0d46dab8c4 XDisplayString (libX11.so.6 + 0x2b8c4)
                #1  0x00007f0d0d004c17 __vaDriverInit_1_10 (nvidia_drv_video.so + 0x6c17)
                #2  0x00007f0d46ee79c3 n/a (libva.so.2 + 0x39c3)
                #3  0x00007f0d46eeacd0 vaInitialize (libva.so.2 + 0x6cd0)
                #4  0x00007f0d0d0e9b76 vaapi_open_device (obs-ffmpeg.so + 0x16b76)
                #5  0x00007f0d0d0ea124 vaapi_device_h264_supported (obs-ffmpeg.so + 0x17124)
                #6  0x00007f0d0d0ea1f9 vaapi_get_h264_default_device (obs-ffmpeg.so + 0x171f9)
                #7  0x00007f0d0d0e6384 obs_module_load (obs-ffmpeg.so + 0x13384)
                #8  0x00007f0d547ed64e obs_init_module (libobs.so.0 + 0x5164e)
                #9  0x00007f0d547edb5f n/a (libobs.so.0 + 0x51b5f)
                #10 0x00007f0d547ee069 obs_find_modules2 (libobs.so.0 + 0x52069)
                #11 0x00007f0d547ee76d obs_load_all_modules2 (libobs.so.0 + 0x5276d)
                #12 0x0000563f81b4b5ed n/a (obs + 0x1255ed)
                #13 0x0000563f81ab0ca8 main (obs + 0x8aca8)
                #14 0x00007f0d53477290 n/a (libc.so.6 + 0x23290)
                #15 0x00007f0d5347734a __libc_start_main (libc.so.6 + 0x2334a)
                #16 0x0000563f81ab2635 n/a (obs + 0x8c635)

                Stack trace of thread 2212:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d51e3bbef n/a (libglib-2.0.so.0 + 0xacbef)
                #2  0x00007f0d51de3132 g_main_context_iteration (libglib-2.0.so.0 + 0x54132)
                #3  0x00007f0d51de3182 n/a (libglib-2.0.so.0 + 0x54182)
                #4  0x00007f0d51e11e05 n/a (libglib-2.0.so.0 + 0x82e05)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2214:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534d9fd4 pthread_cond_timedwait (libc.so.6 + 0x85fd4)
                #2  0x00007f0d548509ba os_event_timedwait (libobs.so.0 + 0xb49ba)
                #3  0x00007f0d547e6185 obs_hotkey_thread (libobs.so.0 + 0x4a185)
                #4  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #5  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2216:
                #0  0x00007f0d535217c5 clock_nanosleep (libc.so.6 + 0xcd7c5)
                #1  0x00007f0d535262d7 __nanosleep (libc.so.6 + 0xd22d7)
                #2  0x00007f0d53552179 usleep (libc.so.6 + 0xfe179)
                #3  0x00007f0d54850e49 os_sleepto_ns_fast (libobs.so.0 + 0xb4e49)
                #4  0x00007f0d5483aaaa n/a (libobs.so.0 + 0x9eaaa)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2215:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534e26a0 n/a (libc.so.6 + 0x8e6a0)
                #2  0x00007f0d5484f2c3 n/a (libobs.so.0 + 0xb32c3)
                #3  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #4  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2217:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534e26a0 n/a (libc.so.6 + 0x8e6a0)
                #2  0x00007f0d5483ac78 n/a (libobs.so.0 + 0x9ec78)
                #3  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #4  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2223:
                #0  0x00007f0d534d74b6 n/a (libc.so.6 + 0x834b6)
                #1  0x00007f0d534e26a0 n/a (libc.so.6 + 0x8e6a0)
                #2  0x00007f0d300913e6 n/a (libobs-scripting.so.1 + 0x63e6)
                #3  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #4  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2213:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d51e3bbef n/a (libglib-2.0.so.0 + 0xacbef)
                #2  0x00007f0d51de3ddf g_main_loop_run (libglib-2.0.so.0 + 0x54ddf)
                #3  0x00007f0d463fcadc n/a (libgio-2.0.so.0 + 0x10aadc)
                #4  0x00007f0d51e11e05 n/a (libglib-2.0.so.0 + 0x82e05)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2211:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d51e3bbef n/a (libglib-2.0.so.0 + 0xacbef)
                #2  0x00007f0d51de3132 g_main_context_iteration (libglib-2.0.so.0 + 0x54132)
                #3  0x00007f0d53d10382 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x34d382)
                #4  0x00007f0d53af8604 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x135604)
                #5  0x00007f0d53be0778 _ZN7QThread4execEv (libQt6Core.so.6 + 0x21d778)
                #6  0x00007f0d461f811f n/a (libQt6DBus.so.6 + 0x2d11f)
                #7  0x00007f0d53c48a21 n/a (libQt6Core.so.6 + 0x285a21)
                #8  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #9  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2210:
                #0  0x00007f0d5354f0bf __poll (libc.so.6 + 0xfb0bf)
                #1  0x00007f0d4652226b n/a (libxcb.so.1 + 0xd26b)
                #2  0x00007f0d46523d1d xcb_wait_for_event (libxcb.so.1 + 0xed1d)
                #3  0x00007f0d42718362 n/a (libQt6XcbQpa.so.6 + 0x4e362)
                #4  0x00007f0d53c48a21 n/a (libQt6Core.so.6 + 0x285a21)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)

                Stack trace of thread 2218:
                #0  0x00007f0d535217c5 clock_nanosleep (libc.so.6 + 0xcd7c5)
                #1  0x00007f0d535262d7 __nanosleep (libc.so.6 + 0xd22d7)
                #2  0x00007f0d54850dd5 os_sleepto_ns (libobs.so.0 + 0xb4dd5)
                #3  0x00007f0d5481f34b obs_graphics_thread_loop (libobs.so.0 + 0x8334b)
                #4  0x00007f0d54820969 obs_graphics_thread (libobs.so.0 + 0x84969)
                #5  0x00007f0d534da8fd n/a (libc.so.6 + 0x868fd)
                #6  0x00007f0d5355ca60 n/a (libc.so.6 + 0x108a60)
                ELF object binary architecture: AMD x86-64
kkartaltepe commented 1 year ago

As mentioned, this is not a problem in OBS but in these (not nvidia supported, and not anyone supported considering its age) drivers. OBS is not doing anything naughty with the VA-API so there is nothing we can do short of making life worse for users with working drivers.

tytan652 commented 1 year ago

Last note: The backtrace confirmed my guess, nvidia_drv_video.so comes from libva-vdpau-driver in this situation.

Some might say that https://github.com/elFarto/nvidia-vaapi-driver/ provides the file but it is a different one code-wise.

tonkku107 commented 1 year ago

@tytan652 thank you for actually mentioning the alternative. I wasn't aware that there was a newer replacement package available.

absolutelynothelix commented 1 year ago

it happened to me as well and removing the libva-vdpau-driver immediately solved the issue. hmu if you want to look at a backtrace.

Paethon commented 1 year ago

Thx. Still had libva-vdpau-driver installed without knowing it. Led to obs crashing with a SIGSEGV signal. Uninstalling solved the problem :+1:

aspensmonster commented 1 year ago

Stumbled across this problem on my Debian install. Seeing as this is the most common search result -- and lots of other forums link back here -- I'm dropping my Debian troubleshooting for posterity.

Running obs in gdb gave me a similar backtrace:

$ gdb obs
... [trimmed output]
(gdb) run
... [trimmed output; crash on start happens here]
(gdb) backtrace
... [trimmed output]
info: NVENC supported

Thread 1 "obs" received signal SIGSEGV, Segmentation fault.
0x00007fffee8f01b0 in XDisplayString () from /usr/lib/x86_64-linux-gnu/libX11.so.6
(gdb) bt
#0  0x00007fffee8f01b0 in XDisplayString () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#1  0x00007fffa1e05ee5 in __vaDriverInit_1_0 () at /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
#2  0x00007ffff0a15e21 in  () at /usr/lib/x86_64-linux-gnu/libva.so.2
#3  0x00007ffff0a16f8e in vaInitialize () at /usr/lib/x86_64-linux-gnu/libva.so.2
#4  0x00007fffb4050e7c in vaapi_open_device () at /usr//lib/x86_64-linux-gnu/obs-plugins/obs-ffmpeg.so
#5  0x00007fffb405120f in vaapi_device_h264_supported () at /usr//lib/x86_64-linux-gnu/obs-plugins/obs-ffmpeg.so
#6  0x00007fffb40512d8 in vaapi_get_h264_default_device () at /usr//lib/x86_64-linux-gnu/obs-plugins/obs-ffmpeg.so
#7  0x00007fffb403d14a in obs_module_load () at /usr//lib/x86_64-linux-gnu/obs-plugins/obs-ffmpeg.so
#8  0x00007ffff655856b in obs_init_module () at /usr/lib/x86_64-linux-gnu/libobs.so.0
#9  0x00007ffff6559a15 in  () at /usr/lib/x86_64-linux-gnu/libobs.so.0
#10 0x00007ffff6559057 in obs_find_modules2 () at /usr/lib/x86_64-linux-gnu/libobs.so.0
#11 0x00007ffff6559727 in obs_load_all_modules2 () at /usr/lib/x86_64-linux-gnu/libobs.so.0
#12 0x00005555556bd2a7 in  ()
#13 0x00005555555ff83c in  ()
#14 0x00005555555dc610 in main ()
(gdb) q
A debugging session is active.

    Inferior 1 [process 81337] will be killed.

Quit anyway? (y or n) y
$

So I dug around for vdpau packages that I might have installed, and found one:

$ apt search vdpau
...[trimmed output]
vdpau-va-driver/now 0.7.4-dmo8 amd64 [installed,local]
  VDPAU-based backend for VA API

In particular, it's listed as [installed,local], meaning it didn't come from deb repositories and I must've installed it myself ages ago (or that it's a super old package from ages ago, which seems to be the case). Which means that there may be landmines for me to discover if I just up and remove it. I tried following the chain of dependencies up from vdpau-va-driver:

$ apt-cache rdepends vdpau-va-driver --installed
vdpau-va-driver
Reverse Depends:
  mesa-va-drivers
  mesa-va-drivers
$ apt-cache rdepends mesa-va-drivers --installed
mesa-va-drivers
Reverse Depends:
  va-driver-all
$ apt-cache rdepends va-driver-all --installed
va-driver-all
Reverse Depends:
 |libva1
 |steam-libs
 |libva2
$ apt-cache rdepends libva2 --installed
libva2
Reverse Depends:
  libavcodec57
  vdpau-va-driver
  libmfx1
  libmfx0
  libgstreamer-plugins-bad1.0-0
  libavutil57
  libavutil56
  libavutil55
  libavcodec59
  libavcodec58
  gstreamer1.0-plugins-bad
  libva-drm2
  vlc-plugin-video-output
  obs-studio
  mpv
  libgstreamer-plugins-bad1.0-0
  gstreamer1.0-plugins-bad
  libavutil58
  libavfilter9
  libavcodec60
  libavutil57
  libavcodec59
  libavutil56
  libavcodec58
  vlc-plugin-video-output
  steam-libs
  obs-studio
  mpv
  mesa-va-drivers
  libva-x11-2
  libva-x11-2
  libva-wayland2
  libva-wayland2
  libva-glx2
  libva-glx2
  libva-drm2
  i965-va-driver
  libmfx1
  libgstreamer-plugins-bad1.0-0
  gstreamer1.0-plugins-bad
  libgavl2
  libavutil57
  libavcodec59
$ apt-cache rdepends libva1 --installed
libva1
Reverse Depends:
  libavcodec54
  libavcodec56
  libavcodec55
  libavcodec53
  libavcodec-ffmpeg56
$

Which ultimately showed a fair amount of reverse-dependencies.

Nevertheless, I'm in a living dangerously mood, so I removed the package anyway:

$ sudo apt remove vdpau-va-driver
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  vdpau-va-driver
0 upgraded, 0 newly installed, 1 to remove and 8 not upgraded.
After this operation, 108 kB disk space will be freed.
Do you want to continue? [Y/n] Y
(Reading database ... 942623 files and directories currently installed.)
Removing vdpau-va-driver:amd64 (0.7.4-dmo8) ...

And then OBS would at least start again. Knowing that vlc was one of the reverse dependencies, I tried playing a video, and it worked, though with log complaints about unknown libva errors:

$ vlc Videos/Fast\ Rapper\ Watsky\ Has\ Damages\ Rapped\ up\ -\ YouTube.mp4 
VLC media player 3.0.18 Vetinari (revision 3.0.18-0-ge9eceaed4d)
[00005619414db550] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[00007f76400049b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
libva info: VA-API version 1.17.0
libva error: vaGetDriverNameByIndex() failed with unknown libva error, driver_name = (null)
[00007f76400049b0] glconv_vaapi_x11 gl error: vaInitialize: unknown libva error
libva info: VA-API version 1.17.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
[00007f76400049b0] glconv_vaapi_drm gl error: vaInitialize: unknown libva error
libva info: VA-API version 1.17.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
libva info: va_openDriver() returns -1
[00007f76400049b0] glconv_vaapi_drm gl error: vaInitialize: unknown libva error
[00007f76400049b0] gl gl: Initialized libplacebo v5.264.1 (API v264)
[00007f7654c18900] avcodec decoder: Using NVIDIA VDPAU Driver Shared Library  525.116.04  Thu Apr 27 17:54:53 UTC 2023 for hardware decoding

I'll update here if I run into any other landmines from my decision to apt remove vdpau-va-driver.

UPDATE 2023-06-14: No problems resulting from that decision. OBS works fine again, no other observed issues on my system.

mirh commented 5 months ago

FWIW the problem was diagnosed at https://github.com/intel/libva/issues/675#issuecomment-1408950331

felixniemeyer commented 5 months ago

On manjaro (arch linux) removing the libva-vdpau-driver resolved the issue:

pacman -Rns libva-vdpau-driver

Be careful not to remove the packages libvdpau lib32-libvdpau Otherwise you'll get: 

obs: error while loading shared libraries: libvdpau.so.1: cannot open shared object file: No such file or directory
mirh commented 5 months ago

Hopefully getting fixed soon™ https://gitlab.archlinux.org/archlinux/packaging/packages/libva-vdpau-driver/-/merge_requests/1 Or you can install libva-nvidia-driver

karenmcd commented 4 months ago

libva-vdpau

i un-installed this driver and obs launched and played perfectly after this, thanks