Crash after scrolling many (larger) pictures

Bedford · June 22, 2022 at 7:02 PM

Hi,

I'm running LibreELEC 10 on a Raspberry Pi 3 B. When scrolling through a big picture collection (e.g. Album covers in the Music folder), LE hangs and then crashes/reboots.

After some web search I've meddled with the parameters "gpu_mem=192" and "dtoverlay=cma,cma-384" in /flash/config.txt, which seems to improve the situation, but does not solve the issue completely.

As I don't have a clue what I'm doing here: what are the "correct" values?

TIA,

Oliver

**HiassofT** · June 23, 2022 at 7:30 AM

Keep gpu_mem at 76, setting it higher only wastes memory.

You could try reducing cma to 384 (as you did), but the problem seems to be that kodi is caching too many pictures and if they are large it runs out of memory at some point...

so long,

Hias

**Da Flex** · June 23, 2022 at 8:05 AM

If you provide a log, then we could get a proof for bad caching implementation, and Kodi team hopefully reacts:

Please provide a full debug log.

How to post a log (wiki)

1. Enable debugging in Settings>System Settings>Logging
2. Restart Kodi
3. Replicate the problem
4. Generate a log URL (do not post/upload logs to the forum)

use "Settings > LibreELEC > System > Paste system logs" or run "pastekodi" over SSH, then post the URL link

Bedford · June 23, 2022 at 7:48 PM

Quote from Da Flex

If you provide a log, then we could get a proof for bad caching implementation, and Kodi team hopefully reacts:

I think this behaviour has already been documented by other people on the web.

Anyway, while trying to paste the log I noticed that "pastekodi" does not produce any link. "pastekodi -c" does indeed show the crash log incl. segfault. Pasting the logs from the GUI failed, too.

I can't paste KODI.log manually, as it exceeds the size limit of pastebin.com with 3.2 MB

Here's the journal log with the segfault:

External Content pastebin.com

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Through the activation of external content, you agree that personal data may be transferred to third party platforms. We have provided more information on this in our privacy policy.

Regards,

Oliver

**Da Flex** · June 23, 2022 at 8:14 PM

Sometimes it takes a while until pastekodi creates a link, but it also could be a server error during the upload. However, the CMA error is visible at the current log:

Code

Jun 23 20:17:15 pan kernel: [drm:vc4_bo_create] *ERROR* Failed to allocate from CMA:
Jun 23 20:17:15 pan kernel: vc4-drm soc:gpu: [drm]                            V3D: 287868kb BOs (281)
Jun 23 20:17:15 pan kernel: vc4-drm soc:gpu: [drm]                     V3D shader:     44kb BOs (11)
Jun 23 20:17:15 pan kernel: vc4-drm soc:gpu: [drm]                           dumb:   4052kb BOs (1)
Jun 23 20:17:15 pan kernel: vc4-drm soc:gpu: [drm]                         binner:  16384kb BOs (1)
Jun 23 20:17:15 pan kernel: vc4-drm soc:gpu: [drm]                total purged BO: 240528kb BOs (235)

**HiassofT** · June 23, 2022 at 9:24 PM

Please try with stock config.txt (i.e gpu_mem=76 and no cma dtoverlay) - the log indicates you are running out of CMA memory, so 394 isn't enough.

Please post another log with stock settings if it fails.

so long,

Hias

Bedford · June 23, 2022 at 9:51 PM

To repeat the already stated facts: meddling with the a.m. values was a result of crashes with the stock configuration - not the other way around. Reverting to original values makes the situation worse, KODI crashes after shorter times/less entries scrolled.

Here is the current journal.log:

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Through the activation of external content, you agree that personal data may be transferred to third party platforms. We have provided more information on this in our privacy policy.

Here the altered config.txt:

External Content pastebin.com

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Oliver

**HiassofT** · June 24, 2022 at 1:30 PM

Do you have an advancedsettings.xml file and have changed imageres , fanartres or other settings? If yes, remove your advancedsettings.xml file and test again.

so long,

Hias

Bedford · June 24, 2022 at 7:21 PM

This was my advancedsettings.xml:

Code

<advancedsettings version="1.0">
  <cache>
    <!--- Settings to improve drop-out behavviour during audio playback -->
    <buffermode>0</buffermode> <!-- perhaps only relevant to video? -->
    <memorysize>60000000</memorysize> <!-- approx. default * 2 -->
  </cache>
  <samba>
    <doscodepage></doscodepage>
    <clienttimeout>10</clienttimeout>
    <statfiles>false</statfiles>
  </samba> 

</advancedsettings>

Display More

Removed it, rebooted. Trying to scroll through my albums: crash after entry 76...

Regards,

Oliver

**HiassofT** · June 24, 2022 at 7:48 PM

You could try increasing cma size further to 448 or 512 (the latter is used on RPi4 by default, but it could be problematic with only 1GB RAM).

It might also be worth to try a full clean installation on a separate SD card (without any further addons, skins etc) - it could also be related to some addon or setting you changed.

We'll need a full pastecrash log to give further advice (non-debug log might already help and cut size down, but debug log would be preferred of course).

so long,

Hias

**HiassofT** · June 24, 2022 at 7:51 PM

Ah, and testing with the latest LE11 nightly build (on a separate SD card) would also be interesting.

so long,

Hias

Bedford · June 24, 2022 at 8:10 PM

The easy part: After increasing cma size to 448 I can scroll all of my album covers (>1600) without crash.

LE still crashes, when trying to access photos on my NAS (to be precise: directory with 178 photos@24 MPixel, each jpg around 4 MB)

I'll try to find a spare micro SD...

Oliver

**Da Flex** · June 24, 2022 at 8:24 PM

If you still have issues with LE11 nightly, then it's time to post a report at Kodi forum (not sure whether it's a known bug). A caching algorithm for picture scrolling should be implemented.

Bedford · June 29, 2022 at 9:15 PM

Rebooted into a clean LE 10 install. Attached my Music-SMB share, populated the database and scrolled my Albums: no crash.

Connected the image folder (s. above): crash after scrolling a few pictures.

I'll try to get a full log, but Kodi is heavily used in the evenings...

Oliver

**Da Flex** · June 29, 2022 at 9:25 PM

Log from LE 11, installed on a different microSD please. Link to nightly builds: Click!

Bedford · July 1, 2022 at 9:27 PM

Using LibreELEC-RPi2.arm-11.0-nightly-20220701-10d897b.img I can provoke a crash by accessing my picture folder (I haven't tested scrolling through my album covers as populating the database is a bit time consuming).

Logs: http://ix.io/41od

I've overwritten my spare SD card with "dd". Is this what you meant with "different" SD card, or do you really mean a physically different one?

Regards,

Oliver

**Da Flex** · July 1, 2022 at 10:48 PM

Physically to avoid surprises on regular usage. No big deal.

**HiassofT** · July 1, 2022 at 10:54 PM

Pletse post the crash log (using "pastecrash" or the crash log file uploader in LE settings). The log you uploaded only contains kodi log after it was restarted.

so long,

Hias