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

[Alain]

On 1/2/26 14:52, Will Dormann wrote:
> On 1/2/26 8:41 AM, Alain via mythtv-users wrote:
>> #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
>
>
> I'll let the experts jump in here, but I'd say that this is indicative 
> of an nvidia driver problem.  I seem to recall nvidia drivers being 
> tied to Ubuntu OS releases, so it's possible that from your jumps from 
> 20.04 to 22.04 and 22.04 to 24.04, something got stuck on a non-ideal 
> version.
>
> Personally, I'd try making sure that your nvidia drivers are up to 
> date.  Caution, though, as I think that some nvidia driver versions 
> are tied to support of specific ranges of GPUs.  So finding the right 
> version may require some trial and error.
>
>
>
> -WD
> _______________________________________________

With respect to Nvidia, I've tried different drivers. Including the most 
recent one, 580, all to the same results on the backend server.  This is 
the current configuration:

nvidia-compute-utils-570/noble-updates,noble-security,now 
570.195.03-0ubuntu0.24.04.1 amd64 [installed,automatic]
nvidia-driver-570-open/noble-updates,noble-security,now 
570.195.03-0ubuntu0.24.04.1 amd64 [installed]
nvidia-firmware-570-570.195.03/noble-updates,noble-security,now 
570.195.03-0ubuntu0.24.04.1 amd64 [installed,automatic]
nvidia-kernel-common-570/noble-updates,noble-security,now 
570.195.03-0ubuntu0.24.04.1 amd64 [installed,automatic]
nvidia-kernel-source-570-open/noble-updates,noble-security,now 
570.195.03-0ubuntu0.24.04.1 amd64 [installed,automatic]
nvidia-prime/noble,noble,now 0.8.17.2 all [installed]
nvidia-settings/noble,now 510.47.03-0ubuntu4 amd64 [installed]
nvidia-utils-570/noble-updates,noble-security,now 
570.195.03-0ubuntu0.24.04.1 amd64 [installed,automatic]

    However, given that I'm getting the exact same results when trying 
to display remotely mythfrontend (see previous mails on this thread), 
the local nvidia driver shouldn't be the root cause.

But as I look back in the backtrace, even though DISPLAY is set to 
remote (localhost:12.0), mythfrontend still goes through the same back 
trace which I don't understand.

    I have tried the Nouveau driver, but the X server/GUI doesn't even 
start. I had enough other issues to troubleshoot and I went back to 
NVidia, but to a different driver.

   Also on the topic of Nvidia, I had to also upgrade to Ubuntu 24.04 to 
keep up with my backend. On my desktop, I never had an issue with the 
mythfrontend. On the desktop, I'm using nvidia 580.95.

   So, while the crash occurs through the NVidia driver, there is 
something else which contributes to those core dumps. Otherwise, this 
forum would be flooded with complaints.

In the meanwhile, I'll try other releases of Nvidia.

Alain