Arch Linux

fasigno

Member

Registered: 2013-11-02

Posts: 5

[SOLVED] Pcie card detecting problem

Hi,
I have met some problems in setting up a Htpc.
I have installed base/base-devel and the drivers for my Turbosight  TBS 6280 DVB-T2 card through AUR.
Sometimes, starting up the pc, it happens that the card is not recognized and the kernel modules are not loaded. Whenever  I reboot the machine the card is immediately recognized, the modules are loaded, the /dev/dvb folder is created with the card's entries.

Unfortunately I wasn't able to try the card when recognized as my mythbackend doesn't work properly yet, but this is another issue.

I attach the "journalctl -b" output both with the card recognized and not.

With dvb recognized: https://dl.dropboxusercontent.com/u/227 … tl.new.txt
Without dvb: https://dl.dropboxusercontent.com/u/227 … -nodvb.txt

Please let me know if you need more logs, as I'm not experienced with them.

Thank you in advance for any kind of help.

Last edited by fasigno (2014-02-12 15:22:33)

fasigno

Member

Registered: 2013-11-02

Posts: 5

Re: [SOLVED] Pcie card detecting problem

Hello,

I haven't succeded in solving the problem yet, and it is very frustrating.

I was able to set up the pvr backend correctly, I switched to Tvheadend because I like faster tv zapping.

The dvb card works perfectly when recognized, also with HD channels.

But the card is often not initialized, particularly when the system is boot up after night.
This morning, for example, the system didn't recognize the card for the first two attemps, then I reboot the system up to 15 times and the card was perfectly recognized.

Here there are the "journalctl -lb" logs:

Dvb recognized: https://dl.dropboxusercontent.com/u/227 … 12-dvb.txt
Dvb not recognized: https://dl.dropboxusercontent.com/u/227 … -nodvb.txt
lspci: https://dl.dropboxusercontent.com/u/227 … ci-dvb.txt

From lspci:

02:00.0 Multimedia controller: Philips Semiconductors SAA7160 (rev 03)
	Subsystem: Device 6280:0011
	Flags: bus master, fast devsel, latency 0, IRQ 17
	Memory at f7d00000 (64-bit, non-prefetchable) [size=1M]
	Capabilities: [40] MSI: Enable- Count=1/32 Maskable- 64bit+
	Capabilities: [50] Express Endpoint, MSI 00
	Capabilities: [74] Power Management version 2
	Capabilities: [80] Vendor Specific Information: Len=50 <?>
	Capabilities: [100] Vendor Specific Information: ID=0000 Rev=0 Len=088 <?>
	Kernel driver in use: SAA716x TBS
	Kernel modules: saa716x_tbs_dvb

After my first post I have updated the system with the new kernel 3.12 and recompiled the dvb drivers.
Then I followed this guide to make tvheadend wait for dvb card initialization, without this tvheadend starts before the card's initialization and I had to restart the backend all the times this happend:

To make tvheadend start after the dvb device is plugged in, I created an udev rule in /etc/udev/rules.d/99-tvheadend.rules:
SUBSYSTEM=="dvb", TAG+="systemd", ENV{SYSTEMD_WANTS}="tvheadend.service"
Also, I added in tvheadend.service:
Wants=dev-dvb-adapter0-frontend0.device
After=dev-dvb-adapter0-frontend0.device 

I have no problems with this in fact each time the card doesn't work is because the /dev/dvb folder is not present.

I'm asking you for any kind of help because I don't even know where to look at, and I cannot understand the reason from the logs.

Could it be a kernel bug? Could it be the motherboard/pci card?

Thank you.

Last edited by fasigno (2013-11-18 19:57:33)

fasigno

Member

Registered: 2013-11-02

Posts: 5

Re: [SOLVED] Pcie card detecting problem

It was a pcie power issue fixed with a patched bios version from manufacturer.