Segmentation fault on loading channel list

[SevereOverfl0w]

Hi, I've just done a fresh install of vuplus to work with OpenATV 7.2. I'm using LibreElec as my Kodi install on a raspberry pi. Unfortunately enabling this plugin triggers reboot loops. Here is a zip of my logs from the crash:

log-2023-10-19-21.32.36-FAILED.zip

In the journal log I noticed there was a segmentation fault which looked pretty damning:

Oct 19 22:31:04 Skarpi kodi.sh[1131]: Segmentation fault (core dumped)
Oct 19 22:31:05 Skarpi pulseaudio[377]: W: [pulseaudio] sap.c: sendmsg() failed: Connection refused
Oct 19 22:31:07 Skarpi kodi.sh[1131]: Crash report available at /storage/.kodi/temp/kodi_crashlog_20231019223104.log

[phunkyfish]

Can you supply a debug log?

It would be a good idea to have a clean LibreElec install, with only pvr.vuplus installed and debug from that point.

The start of your log makes me wonder:

Starting Kodi (20.2 (20.2.0) Git:20.2-Nexus). Platform: Linux ARM 32-bit
Using Release Kodi x32
Kodi compiled 2023-07-15 by GCC 12.2.0 for Linux ARM 32-bit version 6.1.38 (393510)
Running on BCM2835 with LibreELEC (official): 11.0.3, kernel: Linux ARM 64-bit version 6.1.38

Why the mix of 32bit and 64bit?

[SevereOverfl0w]

How can I produce a debug log? I assumed the above logs contained all.

I'm not sure why there's a mix, I'm just using the libreelec raspberry pi image.

[phunkyfish]

https://kodi.wiki/view/Log_file/Easy

[SevereOverfl0w]

log.gz I had to gzip it as the debug log came to 4M! I hope that's OK.

[SevereOverfl0w]

Is there anything I can do to help debug this further?

[phunkyfish]

Just looking at your log now.

[phunkyfish]

Do you have a PC or Mac by any chance? I'd like to rule in/out if this issue is related to 32/64bits.

If you install Kodi and this add-on and see does it crash or run ok.

Nothing obvious stands out from your log. Did you just setup this device up from scratch? Or was it working previously?

[SevereOverfl0w]

I only have linux, and it doesn't appear that there's a zip for it?

I've been running libreelec on my raspberry pi for ages now! It works fine otherwise, I have it working with jellyfin, netflix, prime, etc. You can understand why I'm reluctant to do a clean install.

Poking around, I'm wondering if libreelec are doing their own build of this addon to make it work on the RPi? I can't see an official build that would be for the RPi.

[phunkyfish]

Yes, there are no prebuilt binary addons for linux. Binary add-ons are built differently for LibreElec and Kodi.

Depending on your version of linux your distro might provide kodi packages. Really you just need anyone with a Laptop to connect to your device on your home network to try this out. Or provide remote access but that means opening up your enigma device to the internet.

Ideally we'd have a stacktrace from a debugger to find the root cause.

[chewitt]

Why the mix of 32bit and 64bit?

LE currently uses 32-bit userspace on 64-bit ARM SoC deployments due to a historic lack of aarch64 libwidevine libs to support DRM services. That situation has now changed and LE12 has switched to aarch64 userspace on 64-bit capable hardware. TL/DR: It's normal for LE11 and rather unlikely to be a factor in anything.

[SevereOverfl0w]

I've managed to get this working on Linux using Flatpak, and I am also seeing a segmentation fault. Success!
kodi_crashlog-20231028_163110.log

I'm working on getting a coredump from that now, in the hopes you can extract a stacktrace from it.

[SevereOverfl0w]

kodi_crashlog-20231028_170414.log This version of the log contains the stack trace!

[phunkyfish]

kodi_crashlog-20231028_170414.log This version of the log contains the stack trace!

@ksooo, FYI. This is strange as it looks like a fault in PVR::CPVRChannelGroup::HasChannels somehow.

[SevereOverfl0w]

Are there any clues in that about potential workarounds, can I somehow manually set an option to bypass that HasChannels problem?

I had a look at the source, and it seemed like something wasn't initialised that was being locked.

[phunkyfish]

I agree with you. But I’m afraid I don’t know the solution yet. @ksooo most recently worked in this area of the code so may have an idea.

[phunkyfish]

For some reason your all channels groups does not exist which should never be possible. Maybe your TV.db is corrupt can you supply this file?

[SevereOverfl0w]

I'm not sure how to get the TV.db, can you point me at how to do that? If so, I can!

Looking in OpenWebIf, there's definitely an "All channels" section.

[phunkyfish]

You’ll find it here ~/.kodi/userdata/databases.

Hopefully with that file we can reproduce. Although as it’s happening on two different platforms maybe not.

[SevereOverfl0w]

TV.db.zip

I had TV38.db and TV40.db, so I've included both.

[ksooo]

I had TV38.db and TV40.db

So far for "fresh install". ;-)

Please delete these two files while kodi is not running as well as Epg*.db in the same folder, then report back whether it is still crashing.

[SevereOverfl0w]

Exact same result!
TV.db.zip

Here is TV40.db

[ksooo]

@SevereOverfl0w do you have the chance to disable the "All channels" group in OpenWebIf? If yes, does it make a difference for the crash?

[SevereOverfl0w]

@ksooo I went into OpenWebif's Bouqet Editor and deleted "All channels", but that still has crashed. Did you mean something else?

[ksooo]

I went into OpenWebif's Bouqet Editor and deleted "All channels", but that still has crashed.

@SevereOverfl0w Please also delete TV40.db and Epg*.db after doing this. The TV40.db file gets corrupted due to the bug we're facing. Does this solve the problem?

[SevereOverfl0w]

@ksooo That seems to have made it work, thanks!

[ksooo]

@SevereOverfl0w And now the good news: This bug should already be fixed for Kodi Omega. If you have the chance to test Beta 1 or latest Omega Nightly, you should be able to re-enable "All channels" in OpenWebif's Bouqet Editor and no crash should happen anymore.

Problem is that Kodi in Nexus (and below) does not handle the name clash of your backend-supplied group named "All channels" and the kodi-generated local group with exactly the same name.

[SevereOverfl0w]

Ah, that makes sense! I wonder if I can configure Enigma2 to give the "All channels" bouqet a different name. Thanks for your help!