Hi Mauro!
In the past few days I configured my Thinkpad T61 14'1 notebook to use
rtl2832+r820t tuneres. It seems something could be wrong that related to
r820t. Please take a look on the linked logs.
I use tvheadend 3.4patch1 version that configured to full mux reception.
First I tried Ubuntu 13.10 32bit (kernel 3.11.0-15) that has r820t
support out of the box. At first it seemed to be very unreliable and it
got frozen a couple of times. I saw that my dvb-t dongles was
disconnected and reconnected. Also it seemed to have some problems with
ACPI. (probably unrelated)
So, I installed Ubuntu 12.04.3 LTS 64bit (kernel 3.8.0-35) + media tree
(1ec17dea59ca13b99176a8ab17bc055138714263 on yesterday) "basic" approach
following the tutorial from
http://www.linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers
but it seems this has similar problems like Ubuntu 13.10.
It turned out that a system gets unsatble only when my dvb tuners are
connected.
I have some parital logs that I collected
https://gist.github.com/azbesthu/8755858
Some details about the logs:
It seems it not makes a big difference if I connect only 1 tuner or 3 of
them, but maybe it has more often trouble when more tunners are
connected to the machine. Also it makes no difference when I connect the
tuneres directly to the notebook or its docking statinon's usb hub.
Sometimes it gets completly frozen. SSH connection hangs, opening the
lid not turns on the monitor, no connection with the outside world. In
that case just holding the power button for a few seconsd can turn it off.
Once I had a crash while I set up muxes in tvheadend. When I mapped
available channels the system had a crash that turnd the system
partition to read-only. I was not able to save any logs, because the
readonly filesystem... I was connected with ssh and I had some dmesg
output that showed a kernel failure, but i messed it up while I tied to
save it, unfortunately. The system was so messed up that I was not able
to turn off the machine by software. After turning it off and on again
with the power button, It seemd the usb subsystem had still problems,
because the connected usb hub in the dock was disconnected continuously.
Removing the power cord and the battery got it back to normal working.
After I turned on the machine and left it alone for a while, just
checking dmesg for time to time to see what happens. After 5 to 30
minutes I saw that one tuner disconnected and reconnected again after an
error message. It was the same using hub and connecting it directly to
the notebook.
It had an rc related problem with a tuner and an other tuner got
reconnected.
Later I connected only one tuner. I watched a streamed for a few
minutes. Everything seemd to be fine. But leaving the system alone for a
while it got completly frozen again.
So I removed the tuneres and now the notebook runes withont any glitch,
it's rock solid.
Is it possible that some kinde of bug triggerd on my system?
I can provide more logs if you tell me some info about how to do it,
what use case can help you to debug the possible problems. In worst case
I'm completly locked out from the system and hdd gets readonly befor
able to write out logs.
Also I have in my inventory an rtl2832u+e4000 tuner and some it9135 and
an af9015+tda18218, if some test needed with other tuners. I used it9135
and af9015 tuners in similar configuration and those worked well.
I try to use three rtl2832u+r820t:
http://logout.hu/bejegyzes/azbest/usb_dvb-t_tuner_rtl2832u_r820t.html
Some details about the system, with a tuner attached:
lsusb -v
https://gist.github.com/azbesthu/66a45e30b23dac1d15c8
dmesg
https://gist.github.com/azbesthu/e5724a430f9b3516bcda
Best regards,
Zoltan
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