[mythtv-users] Lubuntu 16.04 - Latest NVidia update causes frontend to crash

[Stephen Worthington]

On Thu, 3 Nov 2016 17:26:07 -0500, you wrote:

>Hello all,
>
>This just happened today. Software updater downloaded and installed new
>Nvidia drivers (version 304.132-0ubuntu0.16.04.2) and after rebooting,
>mythtv frontend crashes when it attempts to launch.
>
>The logs are not reporting an error, but here's where they leave off:
>
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: N
>CoreContext DisplayRes.cpp:64 (Initialize) Desktop video mode: 1920x1080
>59.991 Hz*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext DisplayRes.cpp:208 (SwitchToGUI) Using 1920x1080 59.991 Hz*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext DisplayRes.cpp:225 (SwitchToGUI) SwitchToGUI: Switched to
>1920x1080 59.991 Hz*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: E
>CoreContext lirc.cpp:208 (Init) LIRC: Failed to connect to Unix socket
>'/dev/lircd'#012#011#011#011eno: No such file or directory (2)*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext jsmenu.cpp:153 (ReadConfig) No joystick configuration found,
>not enabling joystick control*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: E
>CoreContext cecadapter.cpp:125 (Open) CECAdapter: Failed to load libcec.*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext mythudplistener.cpp:32 (Enable) UDPListener: Enabling*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext serverpool.cpp:508 (bind) Binding to UDP 127.0.0.1:6948
><http://127.0.0.1:6948>*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext serverpool.cpp:508 (bind) Binding to UDP 192.168.1.141:6948
><http://192.168.1.141:6948>*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext serverpool.cpp:508 (bind) Binding to UDP [::1]:6948*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext serverpool.cpp:508 (bind) Binding to UDP
>[2605:a601:2133:4e00:8d1d:678:2d6d:aeda]:6948*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext serverpool.cpp:508 (bind) Binding to UDP 192.168.1.255:6948
><http://192.168.1.255:6948>*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext mythmainwindow.cpp:1041 (Init) Using Frameless Window*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext mythmainwindow.cpp:1079 (Init) UI Screen Resolution: 1920 x
>1080*
>*Nov  3 16:25:15 compuxeon mythfrontend.real: mythfrontend[3070]: I
>CoreContext mythrender_opengl.cpp:93 (Create) OpenGL: Sync to VBlank is
>enabled (good!)*
>
>
>
>I am not sure how to debug this, but what I would like to do is look at the
>specific options I have set for whether it's using OpenGL or what exactly
>it has set for it's settings, but since the frontend doesn't load, I don't
>know how to examine my settings.
>
>Any suggestions?
>
>Is there a command line option I can give to the frontend to increase
>logging relative to it's graphic mode settings?
>
>Thanks in advance,
>
>Also, if the answer ends up being to "undo" the latest update... I am not
>sure how to do that, so any hints towards that would be much appreciated!
>
>-- George

I just had it happen to me too.  I use VDPAU on an Nvidia 220 card
with Mythbuntu 16.04.  I allowed the crash reporter to file a bug
report about it:

https://bugs.launchpad.net/mythbuntu/+bug/1639215

I have now reverted to the previous Nvidia version, which is
nvidia-304.131 in my case, and mythfrontend is starting up properly
again.

If you want to try that, you can do it from the command line with
apt-get (search for web pages explaining how), or more easily, use the
Synaptic package manager.  Install Synaptic if necessary: apt-get
install synaptic.  Then in Synaptic, do a Quick Search for nvidia,
find the package for your Nvidia drivers in the list and click on it,
then click on Package > Force version and select the previous version.
Then Apply.  Once the older version has been installed, go to Package
> Lock version to prevent any later versions from being reinstalled by
automatic updates.  Then reboot to activate the new (old) Nvidia
version.

See here for more on forcing a package version:

http://www.howtogeek.com/117929/how-to-downgrade-packages-on-ubuntu/

So it looks like the Nvidia-340.132 drivers have a bug, or are doing
something new that is exposing a mythfrontend problem.