Posts by smp

I'm having an issue compiling the Generic build. Looks like there is some problem with gcc 7.2 because older versions of LE9 master compiled fine with kernel 4.8.x.

kernel/built-in.o: In function `update_wall_time':
(.text+0x58be7): undefined reference to `____ilog2_NaN'
make[1]: *** [Makefile:951: vmlinux] Error 1
make[1]: Leaving directory '/home/a/projects/LibreELEC.tv/build.LibreELEC-Generic.x86_64-9.0-devel/linux-4.8.16'
Makefile:12: recipe for target 'image' failed
make: *** [image] Error 2

Quote from adster13

With media if possible please

In LE 9 media_build is now replaced with the CrazyCat installable add-on (Add-ons-->My addons-->Services).

Rock64 looks promising. If it will get a decent support it will probably replace my RPi3.

Quote from rudrood

Is it possible to create a generic build with downgraded kernel?

Thanks

Yes. I'll do a generic build at some point.

Quote from wouter1971

I think this is a real issue on LibreELEC, running on Ubuntu i have no issues with my Megasat SAT>IP in tvheadend. But running tvheadend on LE i get continuity errors. There is something not ok in LE....can anyone relate to this?

Try a build with a downgraded linux kernel.

I built a Kodi 18 LE9 image for RPi2/3. If anyone wants to check it out here it is. It's the same as Milhouse build #0815 but with linux kernel downgraded to "dvb-friendly" 4.8.16.

Who said that "it was working before"? It never worked properly for me. I got sick and tired of random Kodi crashes that were caused by HTSP. I gave up on TVH almost a year ago and never looked back.

More info about the issue is here.

Add this to /storage/.kodi/userdata/advancedsettings.xml

Quote

<advancedsettings>

<omx>

<omxdecodestartwithvalidframe>0</omxdecodestartwithvalidframe>

</omx>

</advancedsettings>

and restart kodi. That file will play fine.

I had similar crashes when I used TVH/HTSP on Pi3. Fixed by switching to VDR/VNSI.

Quote from metaron

Watching BBC2 HD the green artifacts are back (intermittently as they were before).

I think that pretty much confirms that it is not a LibreELEC/linux.conf issue.

Quote from CvH

"We" think the problem is some setting at linux.conf that behaves >=4.9 differently to =<4.8 .

I did a test build using kernel 4.9.29 with an older linux.arm.conf (for kernel 4.8.11). I also removed CONFIG_HZ_300=y and CONFIG_CPU_IDLE=y. This didn't make any difference, I still see an occasional video corruption.

Quote from Zilog Jones

but still occasional continuity errors when playing live - 8 errors in about 15 minutes

Run "vcgencmd arbiter set arm_uc 12 0" from ssh and see if it helps (you can add it to autostart.sh to make the setting permanent).

Also overclock the sdram to at least 550 mhz

sdram_schmoo=0x02000020
sdram_freq=550

Possibly a related issue - Kernel 4.9.x up to 4.11.0~rc4: RPi2 and RPi3 freezing when using Kodi and pvr.mythtv addon · Issue #1946 · raspberrypi/linux · GitHub

Quote from maroi

no problem at all, DVB-S with DVB-Sky960CI running smoothly, no artefacts visible!

Try a 1080i channel, with deinterlacing method set to "MMAL - advanced".

The problem with with kernel 4.9+ and RPi3+DVB dongle is that you can't use advanced deinterlacing on 1080i channels due to frequent artefacts.

With kernel 4.8 (and older) there is no such issue.

With media_build:

LibreELEC-Generic.x86_64-8.0.2-k48.tar

LibreELEC-RPi2.arm-8.0.2-k48.tar

Without media_build:

LibreELEC-Generic.x86_64-8.0.2-k48-nomb.tar

LibreELEC-RPi2.arm-8.0.2-k48-nomb.tar

I'm pretty sure that the issue is RPi-specific. For whatever reason it simply perform worse with kernels newer than 4.8.

I did some testing on Celeron J1800 board and I don't see any issues with Generic builds with any kernel.

4.3-71~g9a62ad3 RPi2/3 for LE8
4.3-71~g9a62ad3 Generic x86_64 for LE8