[mythtv-users] mythfrontend core dumps after upgrade to Ubuntu 24.04

[Alain]

On 1/1/26 18:54, Peter Bennett wrote:
>
> On 1/1/26 12:15, Alain via mythtv-users wrote:
>> On 12/31/25 18:43, Peter Bennett wrote:
>>>
>>> On 12/31/25 11:27, Alain via mythtv-users wrote:
>>>> 2025-12-31 17:09:03.056833 W  OpenGL: OpenGL is disabled for Remote 
>>>> X Session
>>>
>>> Is this correct? Are you trying to run mythfrontend from a remote X 
>>> Session (e.g. via ssh)?
>>>
>>> I tested mythfrontend throuigh ssh on the master version (v36-pre) 
>>> and it works, although that is not recommended. I get the VDPAU is 
>>> not available message but the frontend does not crash.
>>>
>>> Does mythfrontend work on a local session (i.e. not through ssh)?
>>>
>>> You could try running mythfrontend -O ThemePainter=qt . This used to 
>>> be required when running with X remote.
>>>
>>> Peter
>>
>> Hi Peter,
>>
>>      I get the same result, core dump, when run directly on the 
>> backend, as well as remotely over SSH.  It was just easier for me to 
>> make multiple tests through SSH.
>>
>>
>> Regards,
>>
>> Alain
>>
> If you have built and installed it with debugging information, start 
> it under gdb and get a backtrace after it crashes, or if you have a 
> core dump load the core dump with gdb and get a backtrace. Hopefully 
> that will show what is going wrong.
>
> Let me know if you need assistance with how to do this.
>
> Peter
>
Hi, here is the last bit of the output before the core dump followed 
with the backtrace. This is run is with a remote Xdisplay.

2026-01-02 14:35:24.945884 I [10504/10567] ImageLoad 
mythcommandlineparser.cpp:2932:operator()  Qt: libpng warning: profile 
matches sRGB but writing iCCP instead
2026-01-02 14:35:24.951319 I [10504/10579] SendMessage 
mythcorecontext.cpp:467:ConnectCommandSocket 
MythCoreContext::ConnectCommandSocket(): Connecting to backend server: 
192.168.10.26:6543 (try 1 of 1)
[New Thread 0x7ffece7fc6c0 (LWP 10586)]
[New Thread 0x7ffecdffb6c0 (LWP 10587)]
[New Thread 0x7ffecd7fa6c0 (LWP 10588)]
[New Thread 0x7ffeccff96c0 (LWP 10589)]
[New Thread 0x7ffeaffff6c0 (LWP 10590)]
[New Thread 0x7ffeaf7fe6c0 (LWP 10591)]
[New Thread 0x7ffeaeffd6c0 (LWP 10593)]
[New Thread 0x7ffeae7fc6c0 (LWP 10595)]
[New Thread 0x7ffeadffb6c0 (LWP 10596)]
warning: could not find '.gnu_debugaltlink' file for 
/lib/x86_64-linux-gnu/libvdpau.so.1
[New Thread 0x7ffead7fa6c0 (LWP 10597)]

Thread 1 "mythfrontend" received signal SIGSEGV, Segmentation fault.
0x00007fffee670364 in XDisplayString () from 
/lib/x86_64-linux-gnu/libX11.so.6
(gdb) bt
#0  0x00007fffee670364 in XDisplayString () at 
/lib/x86_64-linux-gnu/libX11.so.6
#1  0x00007fff20205f05 in __vaDriverInit_1_0 () at 
/usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
#2  0x00007fffee615873 in vaInitialize () at 
/lib/x86_64-linux-gnu/libva.so.2
#3  0x00007fffef26de5a in vaapi_device_connect (ctx=0x5555560b8b00, 
display=0x555556010fd0) at libavutil/hwcontext_vaapi.c:1682
#4  0x00007fffef267bae in av_hwdevice_ctx_create 
(pdevice_ref=0x7fffffffdf30, type=<optimized out>, device=0x0, opts=0x0, 
flags=0) at libavutil/hwcontext.c:619
#5  0x00007ffff77786a7 in MythCodecContext::CreateDevice 
(Type=AV_HWDEVICE_TYPE_VAAPI, Interop=0x0, Device=...) at 
decoders/mythcodeccontext.cpp:562
#6  0x00007ffff78089e3 in MythVAAPIContext::HaveVAAPI (ReCheck=true) at 
decoders/mythvaapicontext.cpp:427
#7  0x00007ffff77766d1 in MythCodecContext::GetDecoders (Opts=..., 
Reinit=true) at decoders/mythcodeccontext.cpp:181
#8  0x00007ffff77e42eb in MythVideoProfile::InitStatics (Reinit=true) at 
mythvideoprofile.cpp:1366
#9  0x00005555555d5916 in operator() (__closure=0x555555e3a890) at 
mythfrontend.cpp:2190
#10 0x00005555555da2d5 in 
QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, 
void, main(int, char**)::<lambda()> >::call(struct {...} &, void **) 
(f=..., arg=0x7fffffffe320)
     at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#11 0x00005555555da163 in QtPrivate::Functor<main(int, 
char**)::<lambda()>, 0>::call<QtPrivate::List<>, void>(struct {...} &, 
void *, void **) (f=..., arg=0x7fffffffe320)
     at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#12 0x00005555555d9df2 in QtPrivate::QFunctorSlotObject<main(int, 
char**)::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, 
QtPrivate::QSlotObjectBase *, QObject *, void **, bool *)
     (which=1, this_=0x555555e3a880, r=0x555555e35e40, a=0x7fffffffe320, 
ret=0x0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:443
#13 0x00007ffff237ee16 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007ffff6b20c9f in MythMainWindow::SignalWindowReady 
(this=0x555555e35e40) at moc/moc_mythmainwindow.cpp:250
#15 0x00007ffff694166d in MythMainWindow::Init (this=0x555555e35e40, 
MayReInit=false) at mythmainwindow.cpp:769
#16 0x00005555555d6eb4 in main (argc=1, argv=0x7fffffffe7e8) at 
mythfrontend.cpp:2192

     And another run after setting DISPLAY to :0

2026-01-02 14:39:38.095904 I [10775/10775] thread_unknown 
mythdisplay.cpp:1234:ConfigureQtGUI  Display: Not requesting EGL for 
vendor 'NVIDIA, 1.5'
2026-01-02 14:39:38.122417 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Interrupt handler
2026-01-02 14:39:38.122422 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Terminated handler
2026-01-02 14:39:38.122425 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Segmentation fault handler
2026-01-02 14:39:38.122428 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Aborted handler
2026-01-02 14:39:38.122431 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Floating point exception 
handler
2026-01-02 14:39:38.122433 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Illegal instruction handler
2026-01-02 14:39:38.122436 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Bus error handler
2026-01-02 14:39:38.122440 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Real-time signal 0 handler
2026-01-02 14:39:38.122443 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup Hangup handler
2026-01-02 14:39:38.122446 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup User defined signal 1 
handler
2026-01-02 14:39:38.122448 I [10775/10775] thread_unknown 
signalhandling.cpp:184:SetHandlerPrivate  Setup User defined signal 2 
handler
2026-01-02 14:39:38.122606 C [10775/10775] thread_unknown 
mythcommandlineparser.cpp:2913:ConfigureLogging  mythfrontend version: 
fixes/35 [v35.0-46-g15866e231e] www.mythtv.org
2026-01-02 14:39:38.122609 C [10775/10775] thread_unknown 
mythcommandlineparser.cpp:2917:ConfigureLogging  Qt version: compile: 
5.15.13, runtime: 5.15.13
2026-01-02 14:39:38.122653 I [10775/10775] thread_unknown 
mythcommandlineparser.cpp:2919:ConfigureLogging  Ubuntu 24.04.3 LTS (x86_64)
2026-01-02 14:39:38.122654 N [10775/10775] thread_unknown 
mythcommandlineparser.cpp:2921:ConfigureLogging  Enabled verbose msgs:  
general
2026-01-02 14:39:38.122664 N [10775/10775] thread_unknown 
logging.cpp:660:logStart  Setting Log Level to LOG_INFO
2026-01-02 14:39:38.133133 I [10775/10783] Logger logging.cpp:292:run  
Added logging to the console
2026-01-02 14:39:38.133143 N [10775/10775] thread_unknown 
mythdirs.cpp:241:InitializeMythDirs  Using runtime prefix = /opt/local
2026-01-02 14:39:38.133145 N [10775/10775] thread_unknown 
mythdirs.cpp:242:InitializeMythDirs  Using configuration directory = 
/home/alain/.mythtv
2026-01-02 14:39:38.133202 I [10775/10775] CoreContext 
mythcorecontext.cpp:266:Init  Assumed character encoding: en_US.UTF-8
2026-01-02 14:39:38.133478 I [10775/10775] CoreContext 
mythtranslation.cpp:62:load  Loading en_ca translation for module 
mythfrontend
2026-01-02 14:39:38.133628 I [10775/10775] CoreContext 
mythcontext.cpp:597:LoadDatabaseSettings  Empty LocalHostName. This is 
typical.
2026-01-02 14:39:38.133638 I [10775/10775] CoreContext 
mythcontext.cpp:652:LoadDatabaseSettings  Using a profile name of: 
'mytv' (Usually the same as this host's name.)
2026-01-02 14:39:38.133726 I [10775/10775] CoreContext 
mythcontext.cpp:896:TestDBconnection  Start up testing connections. DB 
localhost, BE , attempt 0, status dbAwake, Delay: 2000
[New Thread 0x7fffd2b1d6c0 (LWP 10784)]
[New Thread 0x7fffd1bf36c0 (LWP 10786)]
[New Thread 0x7fffd13f26c0 (LWP 10810)]
[New Thread 0x7fff3bfff6c0 (LWP 10811)]
[New Thread 0x7fff3b7fe6c0 (LWP 10812)]
2026-01-02 14:39:39.649375 N [10775/10775] CoreContext 
mythcorecontext.cpp:1868:InitLocale  Setting QT default locale to en_CH
2026-01-02 14:39:39.649384 I [10775/10775] CoreContext 
mythcorecontext.cpp:1901:SaveLocaleDefaults  Current locale en_CH
2026-01-02 14:39:39.649503 E [10775/10775] CoreContext 
mythlocale.cpp:108:LoadDefaultsFromXML  No locale defaults file for 
en_CH, skipping
2026-01-02 14:39:39.650802 W [10775/10775] CoreContext 
mythuithemehelper.cpp:65:FindThemeDir  ThemeHelper: No theme dir: 
'/opt/local/share/mythtv/themes/Mythbuntu'
2026-01-02 14:39:39.650813 E [10775/10775] CoreContext 
mythuithemehelper.cpp:75:FindThemeDir  ThemeHelper: Could not find 
theme: Mythbuntu - Switching to MythCenter-wide
2026-01-02 14:39:39.667143 I [10775/10775] CoreContext 
mythpowerdbus.cpp:544:AcquireLock  PowerDBus: Failed to delay 
sleep,shutdown: Permission denied
2026-01-02 14:39:39.698440 I [10775/10775] CoreContext 
mythpower.cpp:350:PowerLevelChanged  Power: On AC power
2026-01-02 14:39:39.698445 I [10775/10775] CoreContext 
mythpower.cpp:132:Init  Power: Supported actions: None
2026-01-02 14:39:39.701989 I [10775/10775] CoreContext 
serverpool.cpp:421:listen  Listening on TCP 0.0.0.0:6551
2026-01-02 14:39:39.702260 I [10775/10775] CoreContext 
serverpool.cpp:421:listen  Listening on TCP [::]:6551
warning: could not find '.gnu_debugaltlink' file for 
/usr/lib/x86_64-linux-gnu/qt5/plugins/imageformats/libqgif.so
warning: could not find '.gnu_debugaltlink' file for 
/usr/lib/x86_64-linux-gnu/qt5/plugins/imageformats/libqico.so
warning: could not find '.gnu_debugaltlink' file for 
/usr/lib/x86_64-linux-gnu/qt5/plugins/imageformats/libqjpeg.so
warning: could not find '.gnu_debugaltlink' file for 
/usr/lib/x86_64-linux-gnu/qt5/plugins/imageformats/libqsvg.so
warning: could not find '.gnu_debugaltlink' file for 
/lib/x86_64-linux-gnu/libQt5Svg.so.5
[New Thread 0x7fff3affd6c0 (LWP 10813)]
[New Thread 0x7fff3a7fc6c0 (LWP 10814)]
2026-01-02 14:39:39.922206 I [10775/10775] CoreContext 
mythtranslation.cpp:62:load  Loading en_ca translation for module 
mythfrontend
2026-01-02 14:39:39.922493 W [10775/10775] CoreContext 
mythuithemehelper.cpp:65:FindThemeDir  ThemeHelper: No theme dir: 
'/opt/local/share/mythtv/themes/Mythbuntu'
2026-01-02 14:39:39.922502 E [10775/10775] CoreContext 
mythuithemehelper.cpp:75:FindThemeDir  ThemeHelper: Could not find 
theme: Mythbuntu - Switching to MythCenter-wide
2026-01-02 14:39:39.924207 I [10775/10775] CoreContext 
mythdisplay.cpp:412:GetDesiredScreen  Display: Screen 'HDMI-0' not 
found, defaulting to primary screen (:0.0)
2026-01-02 14:39:39.924218 I [10775/10775] CoreContext 
mythdisplay.cpp:517:DebugScreen  Display: Using screen ':0.0' (Make: 
Unknown Model: Unknown)
2026-01-02 14:39:39.924227 I [10775/10775] CoreContext 
mythdisplay.cpp:519:DebugScreen  Display: Qt screen pixel ratio: 1.00
2026-01-02 14:39:39.924240 I [10775/10775] CoreContext 
mythdisplay.cpp:521:DebugScreen  Display: Geometry: 3840x2160+0+0 
Size(Qt): 1016mmx572mm
2026-01-02 14:39:39.925531 E [10775/10775] CoreContext 
mythdisplayx11.cpp:117:GetVideoModes  DisplayX11: Failed to find an 
output that matches ':0.0'
2026-01-02 14:39:39.928050 I [10775/10775] CoreContext 
mythvrr.cpp:95:Create  VRR: No variable refresh rate support detected
2026-01-02 14:39:39.928074 N [10775/10775] CoreContext 
mythdisplay.cpp:550:Initialise  Display: Desktop video mode: 3840x2160 
60.000Hz
2026-01-02 14:39:39.931997 I [10775/10775] CoreContext 
mythinputdevicehandler.cpp:54:Start  InputHandler: Starting
2026-01-02 14:39:39.932179 E [10775/10775] CoreContext 
lirc.cpp:207:Init  LIRC: Failed to connect to Unix socket '/dev/lircd'
             eno: No such file or directory (2)
2026-01-02 14:39:39.932193 I [10775/10775] CoreContext 
jsmenu.cpp:160:ReadConfig  No joystick configuration found, not enabling 
joystick control
2026-01-02 14:39:39.932427 I [10775/10814] UDP 
mythudplistener.cpp:34:DoEnable  UDPListener: Enabling
2026-01-02 14:39:39.933225 I [10775/10814] UDP serverpool.cpp:562:bind  
Binding to UDP 0.0.0.0:6948
2026-01-02 14:39:39.933252 I [10775/10814] UDP serverpool.cpp:562:bind  
Binding to UDP [::]:6948
[New Thread 0x7fff39ffb6c0 (LWP 10815)]
[New Thread 0x7fff397fa6c0 (LWP 10816)]
[New Thread 0x7fff38ff96c0 (LWP 10817)]
[New Thread 0x7fff23fff6c0 (LWP 10818)]
[Detaching after fork from child process 10819]
warning: could not find '.gnu_debugaltlink' file for 
/usr/lib/x86_64-linux-gnu/qt5/plugins/xcbglintegrations/libqxcb-glx-integration.so
2026-01-02 14:39:39.944653 I [10775/10815] SystemManager 
mythsystemunix.cpp:278:run  Starting process manager
2026-01-02 14:39:39.944841 I [10775/10816] SystemSignalManager 
mythsystemunix.cpp:504:run  Starting process signal handler
2026-01-02 14:39:39.945074 I [10775/10817] SystemIOHandlerR 
mythsystemunix.cpp:91:run  Starting IO manager (read)
2026-01-02 14:39:39.948394 I [10775/10818] SystemIOHandlerW 
mythsystemunix.cpp:91:run  Starting IO manager (write)
2026-01-02 14:39:39.995551 I [10775/10775] CoreContext 
mythscreensaverx11.cpp:68:ScreenSaverX11Private  ScreenSaverX11: DPMS is 
disabled.
2026-01-02 14:39:39.995751 I [10775/10775] CoreContext 
mythmainwindow.cpp:663:Init  Using Frameless Window
2026-01-02 14:39:39.995752 I [10775/10775] CoreContext 
mythmainwindow.cpp:679:Init  Using Full Screen Window
2026-01-02 14:39:40.056777 I [10775/10775] CoreContext 
mythdisplay.cpp:260:SetWidget  Display: Have main widget
2026-01-02 14:39:40.056780 I [10775/10775] CoreContext 
mythdisplay.cpp:264:SetWidget  Display: Have main window
2026-01-02 14:39:40.056792 I [10775/10775] CoreContext 
mythdisplay.cpp:412:GetDesiredScreen  Display: Screen 'HDMI-0' not 
found, defaulting to primary screen (:0.0)
2026-01-02 14:39:40.070260 I [10775/10775] CoreContext 
mythuiscreenbounds.cpp:208:SetUIScreenRect  UIBounds: New UI bounds: 
3840x2160+0+0
[New Thread 0x7fff2158d6c0 (LWP 10821)]
[New Thread 0x7fff20d8c6c0 (LWP 10822)]
[New Thread 0x7fff0ffff6c0 (LWP 10823)]
[New Thread 0x7fff0f7fe6c0 (LWP 10824)]
[New Thread 0x7fff0effd6c0 (LWP 10825)]
[New Thread 0x7fff0e7fc6c0 (LWP 10826)]
[New Thread 0x7fff0dffb6c0 (LWP 10827)]
[New Thread 0x7fff0d7fa6c0 (LWP 10828)]
[New Thread 0x7fff0cff96c0 (LWP 10829)]
[New Thread 0x7ffeeffff6c0 (LWP 10830)]
[New Thread 0x7ffeef7fe6c0 (LWP 10831)]
[New Thread 0x7ffeeeffd6c0 (LWP 10832)]
[New Thread 0x7ffeee7fc6c0 (LWP 10833)]
[New Thread 0x7ffeedffb6c0 (LWP 10834)]
[New Thread 0x7ffeed7fa6c0 (LWP 10835)]
[New Thread 0x7ffeecff96c0 (LWP 10837)]
[New Thread 0x7ffecffff6c0 (LWP 10839)]
[New Thread 0x7ffecf7fe6c0 (LWP 10840)]
[New Thread 0x7ffeceffd6c0 (LWP 10841)]
warning: could not find '.gnu_debugaltlink' file for 
/lib/x86_64-linux-gnu/libvdpau.so.1
2026-01-02 14:39:40.252892 I [10775/10775] CoreContext 
mythrenderopengl.cpp:419:DebugFeatures  OpenGL: OpenGL vendor   : NVIDIA 
Corporation
2026-01-02 14:39:40.252894 I [10775/10775] CoreContext 
mythrenderopengl.cpp:420:DebugFeatures  OpenGL: OpenGL renderer   : 
NVIDIA GeForce RTX 2060/PCIe/SSE2
2026-01-02 14:39:40.252895 I [10775/10775] CoreContext 
mythrenderopengl.cpp:421:DebugFeatures  OpenGL: OpenGL version    : 
4.6.0 NVIDIA 570.195.03
2026-01-02 14:39:40.252905 I [10775/10775] CoreContext 
mythrenderopengl.cpp:422:DebugFeatures  OpenGL: Qt platform   : xcb
2026-01-02 14:39:40.252918 I [10775/10775] CoreContext 
mythrenderopengl.cpp:425:DebugFeatures  OpenGL: EGL display   : No
2026-01-02 14:39:40.252919 I [10775/10775] CoreContext 
mythrenderopengl.cpp:428:DebugFeatures  OpenGL: Qt OpenGL module    : 
OpenGL (not ES)
2026-01-02 14:39:40.252920 I [10775/10775] CoreContext 
mythrenderopengl.cpp:429:DebugFeatures  OpenGL: Qt OpenGL format    : 
OpenGL 4.6
2026-01-02 14:39:40.252920 I [10775/10775] CoreContext 
mythrenderopengl.cpp:430:DebugFeatures  OpenGL: Qt OpenGL surface   : 
RGBA: 8:8:8:0 Depth: 24 Stencil: 0
2026-01-02 14:39:40.252921 I [10775/10775] CoreContext 
mythrenderopengl.cpp:431:DebugFeatures  OpenGL: Max texture size    : 32768
2026-01-02 14:39:40.252923 I [10775/10775] CoreContext 
mythrenderopengl.cpp:432:DebugFeatures  OpenGL: Shaders   : 
Vertex,Fragment,Geometry,Compute
2026-01-02 14:39:40.252924 I [10775/10775] CoreContext 
mythrenderopengl.cpp:433:DebugFeatures  OpenGL: 16bit framebuffers   : Yes
2026-01-02 14:39:40.253881 I [10775/10775] CoreContext 
mythrenderopengl.cpp:387:Init  OpenGL: Initialised MythRenderOpenGL
2026-01-02 14:39:40.253883 I [10775/10775] CoreContext 
mythrenderopengl.cpp:388:Init  OpenGL: Using full range output
2026-01-02 14:39:40.254862 E [10775/10775] CoreContext 
mythuithemecache.cpp:131:RemoveCacheDir  UICache: Removing stale cache 
dir: /home/alain/.mythtv/cache/themecache/alain.3840.2160
2026-01-02 14:39:40.271756 I [10775/10775] CoreContext 
mythuithemecache.cpp:171:PruneCacheDir  UICache: Pruning cache 
directory: /home/alain/.mythtv/cache/remotecache
2026-01-02 14:39:40.272872 I [10775/10775] CoreContext 
mythuithemecache.cpp:221:PruneCacheDir  UICache: Kept 83 files, deleted 
0 files, stat error on 0 files
2026-01-02 14:39:40.272883 I [10775/10775] CoreContext 
mythuithemecache.cpp:171:PruneCacheDir  UICache: Pruning cache 
directory: /home/alain/.mythtv/cache/thumbnails
2026-01-02 14:39:40.274122 I [10775/10775] CoreContext 
mythuithemecache.cpp:221:PruneCacheDir  UICache: Kept 76 files, deleted 
0 files, stat error on 0 files
2026-01-02 14:39:40.306300 I [10775/10831] SendMessage 
mythcorecontext.cpp:467:ConnectCommandSocket 
MythCoreContext::ConnectCommandSocket(): Connecting to backend server: 
192.168.10.26:6543 (try 1 of 1)
2026-01-02 14:39:40.307316 I [10775/10831] SendMessage 
mythcorecontext.cpp:1716:CheckProtoVersion 
MythCoreContext::CheckProtoVersion(): Using protocol version 91 BuzzOff
2026-01-02 14:39:40.331938 I [10775/10775] CoreContext 
mythvideoprofile.cpp:1341:InitStatics  VideoProfile: Resetting 
decoder/render support

Thread 1 "mythfrontend" received signal SIGSEGV, Segmentation fault.
0x00007fffee670364 in XDisplayString () from 
/lib/x86_64-linux-gnu/libX11.so.6
(gdb) bt
#0  0x00007fffee670364 in XDisplayString () at 
/lib/x86_64-linux-gnu/libX11.so.6
#1  0x00007fff20205f05 in __vaDriverInit_1_0 () at 
/usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
#2  0x00007fffee615873 in vaInitialize () at 
/lib/x86_64-linux-gnu/libva.so.2
#3  0x00007fffef26de5a in vaapi_device_connect (ctx=0x555556778380, 
display=0x5555565cfdd0) at libavutil/hwcontext_vaapi.c:1682
#4  0x00007fffef267bae in av_hwdevice_ctx_create 
(pdevice_ref=0x7fffffffdf40, type=<optimized out>, device=0x0, opts=0x0, 
flags=0) at libavutil/hwcontext.c:619
#5  0x00007ffff77786a7 in MythCodecContext::CreateDevice 
(Type=AV_HWDEVICE_TYPE_VAAPI, Interop=0x0, Device=...) at 
decoders/mythcodeccontext.cpp:562
#6  0x00007ffff78089e3 in MythVAAPIContext::HaveVAAPI (ReCheck=true) at 
decoders/mythvaapicontext.cpp:427
#7  0x00007ffff77766d1 in MythCodecContext::GetDecoders (Opts=..., 
Reinit=true) at decoders/mythcodeccontext.cpp:181
#8  0x00007ffff77e42eb in MythVideoProfile::InitStatics (Reinit=true) at 
mythvideoprofile.cpp:1366
#9  0x00005555555d5916 in operator() (__closure=0x555555e32bb0) at 
mythfrontend.cpp:2190
#10 0x00005555555da2d5 in 
QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, 
void, main(int, char**)::<lambda()> >::call(struct {...} &, void **) 
(f=..., arg=0x7fffffffe330)
     at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#11 0x00005555555da163 in QtPrivate::Functor<main(int, 
char**)::<lambda()>, 0>::call<QtPrivate::List<>, void>(struct {...} &, 
void *, void **) (f=..., arg=0x7fffffffe330)
     at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#12 0x00005555555d9df2 in QtPrivate::QFunctorSlotObject<main(int, 
char**)::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, 
QtPrivate::QSlotObjectBase *, QObject *, void **, bool *)
     (which=1, this_=0x555555e32ba0, r=0x555555e23470, a=0x7fffffffe330, 
ret=0x0) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:443
#13 0x00007ffff237ee16 in ??? () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007ffff6b20c9f in MythMainWindow::SignalWindowReady 
(this=0x555555e23470) at moc/moc_mythmainwindow.cpp:250
#15 0x00007ffff694166d in MythMainWindow::Init (this=0x555555e23470, 
MayReInit=false) at mythmainwindow.cpp:769
#16 0x00005555555d6eb4 in main (argc=1, argv=0x7fffffffe7f8) at 
mythfrontend.cpp:2192

Thanks in advance,

Alain