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thornydevil
PostPosted: Fri Jun 17, 2005 8:00 am 
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Joined: Sun Apr 10, 2005 6:00 pm
Posts: 13
Location: Sydney, Australia
I've been successfully using the DViCO FusionHDTV DVB-T Plus card for a while, but I am now trying to find a DVB-T capture card that works out of the box with KnoppMyth (no kernel patching required). After a bit of research the TechniSat AirStar 2 PCI seemed to be the way to go (in Australia). Not enough research I guess...

Auto Install of KnoppMyth r5a16.
Post-install mythtv-setup freezes when I select [new capture card], from the "2.Capture Cards" menu.

Terminal window says:
Couldn't open /dev/video0 to probe its inputs.

I have tried:
-dawas/cesman's suggestion of stopping mythtv-backend http://mysettopbox.tv/phpBB2/viewtopic.php?t=3917
-different PCI slot
-reboot (just in case)

Can anyone point me in the right direction?



The computer configuration is:
Compaq DeskPro EN SFF PIII933
512Mb RAM
hda: 20Gb Maxtor 5T020H2
hdc: YAMAHA CRW2100E CD/RW
built-in LAN and Video
TechniSat AirStar 2 PCI rev:1.0 p/n92400-20200

I've had a search of the LinuxTV forum, but I didn't find anything obvious that would help (at least to someone who is new to Linux). http://www.linuxtv.org/wiki/index.php/Technisat_Airstar2

I thought this might assist?
Extracts from /var/log/messages
Code:
Jun 17 19:52:35 mythtv kernel: ACPI: PCI interrupt 0000:02:0a.0[A] -> GSI 21 (level, low) -> IRQ 21
Jun 17 19:52:35 mythtv kernel: drivers/media/dvb/b2c2/skystar2.c: FlexCopIIB(rev.195) chip found
Jun 17 19:52:35 mythtv kernel: drivers/media/dvb/b2c2/skystar2.c: the chip has 38 hardware filters
Jun 17 19:52:35 mythtv kernel: DVB: registering new adapter (SkyStar2).
Jun 17 19:52:35 mythtv kernel: i2c_readbytes: i2c read error (addr 0a, err == -121)
Jun 17 19:52:35 mythtv kernel: DVB: registering frontend 0 (Zarlink MT352 DVB-T)...

Code:
Jun 17 09:57:51 mythtv kernel: Linux video capture interface: v1.00
Jun 17 09:57:51 mythtv kernel: 00000000
Jun 17 09:57:51 mythtv kernel: PREEMPT SMP
Jun 17 09:57:51 mythtv kernel: Modules linked in: videodev eepro100 pci_hotplug intel_agp 8250_pnp pcspkr tsdev evdev md5 ipv6 autofs4 af_packet snd_mixer$
Jun 17 09:57:51 mythtv kernel: CPU:    0
Jun 17 09:57:51 mythtv kernel: EIP:    0060:[<00000000>]    Not tainted VLI
Jun 17 09:57:51 mythtv kernel: EFLAGS: 00010246   (2.6.11.9-chw-2)
Jun 17 09:57:51 mythtv kernel: EIP is at 0x0
Jun 17 09:57:51 mythtv kernel: eax: e1498234   ebx: de3f8400   ecx: 00000001   edx: 00000001
Jun 17 09:57:51 mythtv kernel: esi: de3f8508   edi: 00000000   ebp: 00000000   esp: d3e89f4c
Jun 17 09:57:51 mythtv kernel: ds: 007b   es: 007b   ss: 0068
Jun 17 09:57:51 mythtv kernel: Process kdvb-fe-0 (pid: 5139, threadinfo=d3e88000 task=dec96aa0)
Jun 17 09:57:51 mythtv kernel: Stack: e148597e de3f8508 de3f8508 e14863e7 00000002 de3f8508 de0ba400 e14a61d3
Jun 17 09:57:51 mythtv kernel:        de3f8508 d3e88000 e14a6643 de3f8508 00000000 00000000 00000000 00000bb8
Jun 17 09:57:51 mythtv kernel:        d3e89fa4 c03e7baf c01175a0 00ec8f60 dfd32040 de1cbcc0 d3e89fb8 c01175ee
Jun 17 09:57:51 mythtv kernel: Call Trace:
Jun 17 09:57:51 mythtv kernel:  [pg0+552642942/1067987968] mt352_init+0x4e/0x70 [mt352]
Jun 17 09:57:51 mythtv kernel:  [pg0+552776147/1067987968] dvb_frontend_init+0x23/0x40 [dvb_core]
Jun 17 09:57:51 mythtv kernel:  [pg0+552777283/1067987968] dvb_frontend_thread+0x93/0x4d0 [dvb_core]
Jun 17 09:57:51 mythtv kernel:  [_spin_unlock_irq+15/48] _spin_unlock_irq+0xf/0x30
Jun 17 09:57:51 mythtv kernel:  [finish_task_switch+48/112] finish_task_switch+0x30/0x70
Jun 17 09:57:51 mythtv kernel:  [schedule_tail+14/80] schedule_tail+0xe/0x50
Jun 17 09:57:51 mythtv kernel:  [ret_from_fork+6/32] ret_from_fork+0x6/0x20
Jun 17 09:57:51 mythtv kernel:  [pg0+552777136/1067987968] dvb_frontend_thread+0x0/0x4d0 [dvb_core]
Jun 17 09:57:51 mythtv kernel:  [pg0+552777136/1067987968] dvb_frontend_thread+0x0/0x4d0 [dvb_core]
Jun 17 09:57:51 mythtv kernel:  [kernel_thread_helper+5/12] kernel_thread_helper+0x5/0xc
Jun 17 09:57:51 mythtv kernel: Code:  Bad EIP value.
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cesman
 Post subject:
PostPosted: Sat Jun 18, 2005 12:34 am 
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Joined: Fri Sep 19, 2003 7:05 pm
Posts: 5088
Location: Fontana, Ca
Your setup is wrong the Air2PC isn't /dev/videoX, it is a DVB device and must be setup as such.

_________________
cesman

When the source is open, the possibilities are endless!
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thornydevil
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PostPosted: Sat Jun 18, 2005 5:33 pm 
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Joined: Sun Apr 10, 2005 6:00 pm
Posts: 13
Location: Sydney, Australia
cesman wrote:
Your setup is wrong the Air2PC isn't /dev/videoX, it is a DVB device and must be setup as such.


If you mean in the mythtv-setup card selection screen, choose DVB card rather than /dev/videoX, I cannot get that far. As soon as I select [new capture card] instead of display the screen that allows me to choose the card type, I get bounced back to the main mythtv-setup menu "1.General", "2.Capture Cards",... and the mythtv-setup screen is frozen.

If you mean somewhere else, where do I look?
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thornydevil
PostPosted: Sun Jun 19, 2005 7:24 am 
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Joined: Sun Apr 10, 2005 6:00 pm
Posts: 13
Location: Sydney, Australia
Success. I don't know if it was overkill, but I updated the kernel to 2.6.12 and the TechniSat AirStar 2 DVB-T card works a treat. No patching required :-)

I'm not sure what was wrong with the basic KnoppMyth r5a16 installation with the 2.6.11.9-chw-2 kernel, but I could never get into the card settings screen in mythtv-setup.

I tried a previous version of KnoppMyth (r5a12, but it didn't recognise card - although mythtv-setup did not lock-up).

I noticed that there had been some patches to the B2C2 flexcop modules in kernel 2.6.12.

I just found this webpage which says that the card has an updated frontend chip (mt352) and only the earlier revision (mt312) worked out of the box. So maybe therein lies the culprit?
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