A small sample of the problematic file could be useful.
Posts by smp
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Are you able to use adv (x2)
Yes. There is no reason not to use advanced x2.
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have you tested if you get the same results if recording to a USB HDD instead of sdcard?
I actually get the same results even if there is no recording going on (~1 or 2 ActiveAE errors per hour in kodi.log and rare short audio dropouts). Recording just makes the issue far more obvious and easy to reproduce.
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Tested kernels 4.11.9 and 4.10.14. With both I had audio dropouts / ActiveAE errors in kodi.log when recording to an sdcard.
Absolutely no issues with kernel 4.9.75 + Linus softirq patch. Not a single audio dropout, no ActiveAE errors in log.
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Will test 4.12 now.
Same issue with kernel 4.12.14. Will test 4.11 now.
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did you see continuity errors such as these in your tvheadend log?
I don't use tvheadend, I use VDR. There are audio dropouts and tons of ActiveAE errors in kodi.log when there is any network activity or during recording to an RPi's sdcard. I just tested a build with kernel 4.13.16 and the issue is there too. Will test 4.12 now.
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So I would suggest this further regression has occurred since 4.11.12.
I will compile and test a couple of RPi2 builds with kernels 4.12 and 4.13. Thankfully the issue is very easy to reproduce.
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there has been a further regression in later kernels 4.14/4.15?
I'm afraid so. But unlike the softirq problem this does not affect the recorded stream, this is a playback-only issue. Also, I don't know when this started - I did not test kernels 4.10/4.11/4.12/4.13.
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Try this LE9 RPi2 build with Linus Torvalds' softirq patch and kernel 4.9.73. Works great, no issues even when recording.
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when I watch Live-TV while recording (the same channel, like timeshift) there are audio drop-outs.
I noticed the audio dropouts with kernels 4.14/4.15 but didn't want to post about it in this thread because this issue is unrelated to softirq. There is no such problem with kernel 4.9 (with patched and unpatched softirq).
I did some basic performance testing with different kernels but with otherwise identical builds. For some reason kernels 4.14/4.15 generally perform much worse than 4.9 in LE and have all sorts of audio issues (the dropouts sometimes happen even when there's not much network or i/o activity).
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I now tested the patch from Linus Torvalds with kernel 4.9.75 and 4.14.10 and it works great, no issues whatsoever. I can only test on RPi3.
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Linus provided a further patch. Please test
This looks very good. No video corruption, same effect as reverting 4cd13c21b207e80ddb1144c576500098f2d5f882.
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I tried to increase the buffer size even further
Codestream = DVB_USB_STREAM_BULK(0x82, 128, 8192)No improvement as well.
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No improvement whatsoever with the buffer increase patch.
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Ok, I compiled an RPi2 build with dvbsky buffer patch, no reverted commits, kernel 4.9.73. VDR works. Testing right now.
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Presumably the VDR issue is unrelated to the kernel patch.
This must be somehow related, I never had an issue with VDR before. No clues in kodi.log or "dmesg | grep dvb". The tuner seem to be enabled but VDR backend just doesn't start.
I will try it with my own build.
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Please test and report results - thanks!
VDR server does not start with that build.
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But now I upgraded to image provided by milhouse (this one: LibreELEC-RPi2.arm-9.0-Milhouse-20180102133316-#0101z-g866291e.tar
You can now use Milhouse' nightly builds - the ksoftirqd patch is included since build #0104.
