can anyone help with this ? https://tvheadend.org/boards/5/topics/39128
void09: could you please send an e-mail to linux-media@vger.kernel.org? please provide additional details... for example: what software were you using? Did you test with some other software? are you watching CI encrypted channels? etc
I could do that, but I want to know what details to provide
that said, celeron g1840 seems a slow machine, specially if you're using it to watch the channel
mchehab:, I was using tvheadend, as this is posted on their forums, and tried kaffeine which works without issues. same thing if encrypted or non encrypted channels
mchehab: no, i was using it just to stream, although watching the channel has little overhead, h264 is cheap to decode
12% cpu usage when streaming, no visible spikes with htop
h264 is only cheap to decode if using the GPU
but celeron g1840 is heaps faster than raspberry pi, and people are using the pi for streaming
I tried using kaffeine, which does not stream , just plays locally. and with the decoding overhead from kaffeine + the encoding overhead of teamviewer, i still do not get errors in the stream
works ok at 93% cpu usage
so it's tvheadend issue, or a combo of the way tvheadend manipulates the driver of this tuner
yeah, it sounds so
I can't help you with tvheadend, as I don't even have it installed
from Kernel PoV, querying the status shouldn't be a problem
well, it does relieve the problem, as I wrote. error rate is ~5x lesss with 8s probe vs 1s probe
can't set it to more than 8s, tvheadend limit
and only using 1 tuner, so no usb bottleneck. I have 12 tuners in total but removed them all but one to debug this problem
took a quick look at the driver... in principle, I didn't see any problem
(hard to tell without knowing more)
dvb_usb_rtl28xxu     ?
does this issue happen with other tuners too?
looked there, at r820t and at rtl2830 frontend
yeah, i tested tvheadend with 8 tuners, all recordding 1-2 stations each.
status queries are actually handled by r820t and rtl2830
all recordings had many errors, constantly
i thought it's a signal problem, as i used a signal amplifier/splitter.
try kernel < 4.9 and see if the same issue happens
but now the tuner is connected directly to the main cable, nothing in between. and kaffeine, as I said, plays smoothly
(there was a change at Kernel 4.9 logic with affects the softirq scheduler)
this causes a bug with some RPi devices that look somewhat similar
uhm, on the wiki page i mentioned, it said something about kernel >5.0 for support of my tuner
Supported: most likely since 5.0
all 12 tuners you have are based on rtl chipset?
yes, they are identical model
they also have a  Sony CXD2837ER  chip
the rtl driver is old... it shouldn't be hard to backport it
but that is not used for dvb-c as far as i can see, but for dvb-t
you can also use media-build tree
with will compile the media stack against an older Kernel
hmm... Demodulator: Panasonic MN88473 (2013 revision: MN88472) (2018 revision: Sony CXD2837ER)
kernel 4.19.69, good ?
no, < 4.9
4.8, for example
4.4 is the newest <4.9 in my package manager's options
ok, 4.4 should work
help me with setting it as default ? it's a remote box
if you're using the Kernel from the distro, you'll need the devel package as well, in order to build the Kernel drivers from media-build git tree
grub-set-default
(or grub2-set-default, depending on the distro)
oh, i must build drivers too?
yes
if the support was added after 4.4
it is easy to build
ok, how to list grub menu entries?
grub-set-default asks me for menu entry number
actually, it asks for the name
cat /etc/grub.conf
(or grub-efi.conf)
no such file on manjaro linux
this is how to build the drivers: https://linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers
I've no idea on manjaro
you'll find it also at /boot/grub
$ ls -l /etc/|grep grub
lrwxrwxrwx.  1 root root        22 mai 20 14:19 grub2.cfg -> ../boot/grub2/grub.cfg
lrwxrwxrwx.  1 root root        31 mai 20 14:19 grub2-efi.cfg -> ../boot/efi/EFI/fedora/grub.cfg
set it to "3" and rebooted, hope it gets back online
it asked me to blacklist some network module that conflicted with what I had.. forgot.
good luck!
yep it's online
check if it detected the device
if not, use the wiki page above as a helper about how to build the media Kernel drivers for 4.4
the "Basic" User's Approach should be enough
but kernel has not changed.. entry #3 was not the one
depending on how grub is set on manjaro, you could do:
$ sudo su -c "grep title /boot/loader/entries/* |cut -d: -f 2-"
on Fedora, this gives:
title Fedora (4.18.20+) 30 (Workstation Edition)
title Fedora (4.20.0) 30 (Workstation Edition)
...
then you can set with the title name, like:
grub2-set-default "Fedora (4.20.0) 30 (Workstation Edition)"
Manjaro Linux (Kernel: 4.4.190-1-MANJARO x64)
ok
grub2-set-default "Manjaro Linux (Kernel: 4.4.190-1-MANJARO x64)"
sudo grub-set-default "Manjaro Linux (Kernel: 4.4.190-1-MANJARO x64)"
isso
and i'm still on 5.2 lol
found grub-customizer gui tool (for noobs like me)
ok with 4.4,only seeing rtl2832 (DVB-T)
so I got all the requirements.. a little help please?
git clone --depth=1 git://linuxtv.org/media_build.git
cd media_build  && ./build
?
I did that.. and build fails: https://pastebin.com/8wDt22gE