Totem and totem-video-thumbnailer in Ubuntu 20.04/20.10 is currently broken on aarch64

[RussianNeuroMancer]

Hello!

I found that totem-video-thumbnailer is broken on aarch64. It fail with following error:

(totem-video-thumbnailer:12136): GStreamer-WARNING **: 00:43:52.740: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstlibav.so': /lib/aarch64-linux-gnu/libgomp.so.1: cannot allocate memory in static TLS block

(totem-video-thumbnailer:12136): GStreamer-WARNING **: 00:43:52.764: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstlibav.so': /lib/aarch64-linux-gnu/libgomp.so.1: cannot allocate memory in static TLS block

(totem-video-thumbnailer:12136): GStreamer-WARNING **: 00:43:52.788: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstlibav.so': /lib/aarch64-linux-gnu/libgomp.so.1: cannot allocate memory in static TLS block

I tried to rollback all related packages I could think of (totem, gcc-9, ffmpeg) to previous releases, but for some reason this doesn't help. I remember video thumbnail generation on aarch64 worked fine few weeks ago.

[RussianNeuroMancer (russianneuromancer)]

I added gcc-9 and ffmpeg to related packages because if search "libgomp.so.1: cannot allocate memory in static TLS block" in Google you will find this issue starting to appear in different program this years (such as Anaconda installer, OpenCV, PHP ImageMagick module) so I don't think this issue is isolated to Totem. However, Totem is only program where I can reliable reproduce this issue right now.

[Daniel van Vugt (vanvugt)]

Yes, libgomp is from source package gcc-9.

[RussianNeuroMancer (russianneuromancer)]

Daniel, I just found that video previous successfully generated for video files compressed with VP9 video codec, but not for everything else I tested so far. I guess this may suggest this issue is somehow related to gstreamer or ffmpeg extra packages with additional (patented) codecs such as H.264.

[RussianNeuroMancer (russianneuromancer)]

Issue is still reproducible on Focal.

[RussianNeuroMancer (russianneuromancer)]

Just noticed that this issue affect regular Totem video player too. And it also is still reproducible on 20.10.

[RussianNeuroMancer (russianneuromancer)]

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/648

[RussianNeuroMancer (russianneuromancer)]

Answers from GStreamer bugtracker:

> This very much looks like it's something much lower level than gstreamer-libav. Googling libgomp shows it's an openmp implementation used with gcc which means I imagine this issues is either some compiler or ffmpeg issue or some combination thereof.

> Yeah, this is not a problem on our side. Please report this in Ubuntu against their toolchain.

By the way, I guess Totem is currently broken on Ubuntu Desktop images for Raspberry Pi 4 too?

[Alfonso Sanchez-Beato (alfonsosanchezbeato)]

This is, I think, a glibc bug. See https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1914044

[Balint Reczey (rbalint)]

For the record 20.10 should be fixed already and the test packages referred to from the other bug should fix this problem.