[mythtv-commits] Ticket #6580: changing location of dvb-t-devices in /dev does break channel-scanning

[MythTV]

#6580: changing location of dvb-t-devices in /dev does break channel-scanning
-----------------------------------------+----------------------------------
 Reporter:  markus.doits at googlemail.com  |       Owner:  danielk
     Type:  defect                       |      Status:  new    
 Priority:  minor                        |   Milestone:  unknown
Component:  MythTV - Channel Scanner     |     Version:  unknown
 Severity:  medium                       |     Mlocked:  0      
-----------------------------------------+----------------------------------
 i've got two dvb-t devices. on startup they are created as
 /dev/dvb/adapter[0,1]. sometimes on is "0", sometimes the other. since i
 want them to be static i simply created an udev-rule to put the devices
 into

 {{{
 /dev/dvb/adapter_terra
 /dev/dvb/adapter_nova
 }}}

 by the udev-rule

 {{{
 KERNEL=="dvb*", SUBSYSTEM=="dvb", PROGRAM="/root/scripts/devicenamer.sh
 $name %p", NAME:="%c"
 }}}
 (devicenamer.sh checks the device-info and returns the correct location)

 assigning the new locations in mythtv-setup works, watching tv in frontend
 etc. works too, but scanning for channels in mythtv-setup gives "scan
 type: failed to open the card" and on console

 {{{
 2009-05-26 14:58:52.473 FE_GET_INFO ioctl failed
 (/dev/dvb/adapter_nova/frontend0).
 }}}

 when mythtv-backend is NOT running.

 starting the backend and trying to scan for channels i do not get the
 error (so e.g. i get "scan type: full scan") but on hitting "next" the
 scan also does not work and on console:

 {{{
 2009-05-26 15:00:50.402 DVBChan(1:/dev/dvb/adapter_nova1/frontend0) Error:
 Opening DVB frontend device failed.
                         eno: Device or resource busy (16)
 }}}
 which obviously is as it should be, because the backend is accessing it.

 oh and i think i did not mention before: without the udev-rule (having the
 devices in adapter[0,1]) channel scanning works.

 i also tried symlinking with udev, no success either. in this case i
 cannot scan with mythtv-setup either having the symlink configured as the
 card nor the original device-node the symlink is pointing to. very weird.

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/6580>
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