Bug 362323 - kdenlive freeze randomly
Summary: kdenlive freeze randomly
Status: RESOLVED FIXED
Alias: None
Product: kdenlive
Classification: Applications
Component: Rendering & Export (show other bugs)
Version: 15.12.2
Platform: Ubuntu Linux
: NOR critical
Target Milestone: ---
Assignee: Jean-Baptiste Mardelle
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-04-26 20:23 UTC by sgripon
Modified: 2016-08-04 17:12 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
strace and call stack (2.08 KB, application/zip)
2016-04-26 20:23 UTC, sgripon 		Details
crash backtrace (14.03 KB, text/plain)
2016-06-25 20:24 UTC, riku.seppala 		Details
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Description sgripon 2016-04-26 20:23:39 UTC 
Created attachment 98628 [details]
strace and call stack

I do not know really when it happens, but kdenlive freeze randomly when using it, most of the time just by moving clips. It looks like a deadlock.

strace show that application is blocked in futex wait call (see attachment) and call stack seems to wait for a pthread join in mlt.

Just for information, if it can be linked:
- just upgraded to Ubuntu 16.04
- I have 2 monitors with 2 different sizes
Comment 1 sgripon 2016-04-26 20:24:30 UTC 
In fact, kdenlinve --version gives me 15.12.3.
Comment 2 sgripon 2016-04-26 20:26:34 UTC 
To be clear: this issue happens at every run in less than 5 minutes, so kdenlive cannot be used for me.

If I can do something to give you more information, just ask!
Comment 3 Jean-Baptiste Mardelle 2016-04-26 20:48:22 UTC 
Could you test the latest version (Kdenlive 16.04), available from our official PPA:
https://launchpad.net/~kdenlive/+archive/ubuntu/kdenlive-testing
Lots of bugfixes and updates were made in this new version. Please let me know if it fixes the problem.
Comment 4 riku.seppala 2016-04-27 06:25:07 UTC 
Happens to me too often with version 15.12.2. I'm on Fedora 23 and waiting for rpmfusion to update to 16.04.

One way to make it freeze for me is: Add clip -> select clip -> press delete
Comment 5 sgripon 2016-04-27 07:28:26 UTC 
Tested with 16.04, I do not have the issue so far. I suggest to monitor this point a few days, I will have to use kedenlive frequently in the coming week.

I experiences a crash but probably no link with previous issue and I don't have much information.
Comment 6 farid 2016-06-25 02:22:54 UTC 
If this issue is resolved please mark it as resolved.
Comment 7 riku.seppala 2016-06-25 20:23:24 UTC 
Well, for me this is not resolved. Finally upgraded to Fedora 24 so I could Kdenlive 16.04. Kdenlive crashed on startup everytime, removing config file made it work. But it still seems crashy. I can open any kdenlive project file made with version 15 and simply press play and Kdenlive will crash or freeze. But I can't get any backtrace even with debug packages installed.

Well I got one backtrace but I don't remember what I did at that time, it might be that startup crash that I fixed by deleting kdenliverc. I'll attach it anyway.
Comment 8 riku.seppala 2016-06-25 20:24:05 UTC 
Created attachment 99693 [details]
crash backtrace
Comment 9 Wegwerf 2016-08-04 16:41:05 UTC 
Riku, still present with stable 16.04.2? This looks very much like a distro issue, thus being a downstream issue. Can you please report back with stable 16.04.2 and recent MLT 6.2.0+?
Comment 10 riku.seppala 2016-08-04 17:00:10 UTC 
No. 16.04 is WAY more stable than 15.12. There was (is?) issues with 16.04 when using nouveau driver, after  I switched to nvidia driver everything is OK now.