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

[John Hoyt]

On Fri, Jan 2, 2026 at 10:12 AM Alain via mythtv-users <
mythtv-users at mythtv.org> wrote:

> 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
>

Have you attempted to clear out and rebuild the old nvidia dkms modules
(substitute the right version for xxx.yyy.zz)?

sudo dkms remove -m nvidia -v xxx.yyy.zz --all (Removes all versions)
sudo dkms add -m nvidia -v xxx.yyy.zz
sudo dkms install -m nvidia -v xxx.yyy.zz -k $(uname -r)
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