[mythtv-users] Check DVB device

[dennis]

On 05/03/2015 07:26 AM, Stephen Worthington wrote:
> On Sun, 3 May 2015 13:19:40 +0200, you wrote:
>
>> Hello,
>>
>> I have some problems with DVB USB devices, sometimes it crash and I need to
>> reboot the backend to use it. Here is a dmesg output when it happens:
>> http://paste.debian.net/170723/
>>
>> I am using Debian Jessie with 3.16.0-4-amd64 kernel.
>>
>> Is there any way to check if the device is wrong?
>>
>> The problem is that it occurs and if there is a recording, it doesn't
>> record.
>>
>> I want to check with a script if it happerns and do a fast reboot.
>>
>> Best regards.
>
I have a similar problem with a saa7164 PCI based card (HVR-2250). 
Every  once or twice a year,  the card just stops working.

I have i no symptoms until the backend actually tries to access the 
card.  Nothing in any log, until a recording is supposed to start, and 
fails..   I just have cron grep for the failure in the backend log and 
reboot.  This catches it quickly and I only miss about 2 minutes of the 
show.

I run the following from cron at 01 and 31 minutes past the hour on the 
backend.

DVBSTAT=`grep "Failed to open DVB frontend device" 
/var/log/mythtv/mythbackend.log`
if [ ! "$DVBSTAT" = "" ]
then
         echo "REBOOTING BECAUSE of $DVBSTAT"
         stop mythtv-backend
         /sbin/reboot
fi