[mythtv-users] DVB-T, Could not open card #0

Markus Buchanan markusb at netspace.net.au
Sun Nov 7 08:05:26 UTC 2004

I had this problem with a Nebula DigiTV card, turned out the permission were

Have a look at the permissions on the device files, once I change mine Myth
was happy to register it.


-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of David Whyte
Sent: Sunday, 7 November 2004 4:01 PM
To: Discussion about mythtv
Subject: [mythtv-users] DVB-T, Could not open card #0

Wow!!!  I think my AverMedia 771 DVB-T card is up and running.  I can run
tzap and get signal locks, but I can't use player to test (even after trying
to recompile with DVB support it just does not seem to understand the dvb://

Anyways, everything seems good, with the following output from DMESG

PCI: Setting latency timer of device 0000:00:11.5 to 64 Linux video capture
interface: v1.00
bttv: driver version 0.9.15 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Bt8xx card found (0).
ACPI: PCI interrupt 0000:00:0a.0[A] -> GSI 11 (level, low) -> IRQ 11
bttv0: Bt878 (rev 17) at 0000:00:0a.0, irq: 11, latency: 32, mmio:
bttv0: detected: AVermedia DVB-T 771 [card=123], PCI subsystem ID is
bttv0: using: AVerMedia AVerTV DVB-T 771 [card=123,autodetected]
bttv0: gpio: en=00000000, out=00000000 in=00f0ff0f [init]
bttv0: using tuner=4
bttv0: registered device video0
bttv0: registered device vbi0
bttv0: PLL: 28636363 => 35468950 .. ok
bttv0: add subdevice "remote0"
bttv0: add subdevice "dvb0"
bt878: AUDIO driver version 0.0.0 loaded
bt878: Bt878 AUDIO function found (0).
ACPI: PCI interrupt 0000:00:0a.1[A] -> GSI 11 (level, low) -> IRQ 11
bt878(0): Bt878 (rev 17) at 00:0a.1, irq: 11, latency: 32, memory:
DVB: registering new adapter (bttv0).
DVB: registering frontend 0 (Zarlink MT352 DVB-T)...

The problem is that in Mythsetup, when I try and setup the adaptor, it
obvisouly recognises the card as being there but it cannot open the card,
the 'Device or Resource is busy'.  I am running everything as root and the
ls of the adaptor0 directory is as follows:

[myth at myth myth]$ ls -l /dev/dvb/adapter0/ total 0
crw-rw----  1 root video 212, 1 Nov  4 23:09 audio0
crw-rw----  1 root video 212, 6 Nov  4 23:09 ca0
crw-rw----  1 root video 212, 4 Nov  4 23:09 demux0
crw-rw----  1 root video 212, 5 Nov  4 23:09 dvr0
crw-rw----  1 root video 212, 3 Nov  4 23:09 frontend0
crw-rw----  1 root video 212, 7 Nov  4 23:09 net0
crw-rw----  1 root video 212, 8 Nov  4 23:09 osd0
crw-rw----  1 root video 212, 0 Nov  4 23:09 video0

I don't know what, but in another post i read, the '212' part was
significant, something to do with a change in the major version number.  Of
what I don't know, but by soeone noting that, it fixed the guys problems.

Anyone have any decent ideas of a way to step forward???

GMAIL is 'da bomb baby....YEAH

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