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gtroland
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Joined: 09 Jul 2002
Posts: 74

PostPosted: Thu Jul 11, 2002 12:53 pm    Post subject: Can Anyone Help with Video4Linux? Reply with quote

Hi everyone,

Got Gentoo up and running over the last weekend, but still having a problem with one component of my system: V4L. V4L previously worked on this machine with RH7.0/1/2, so I'm pretty sure the hardware itself is OK. My video capture card is a Pinnacle (Miro) DC10+. I compiled I2C, Video4Linux, Zoran 36057/36060, and Miro DC10+ support into the kernel (also tried substituting Buz for Miro DC10+), and created devices /dev/video, /dev/v4l/video with mknod video0 c 81 0. Also created "video" symlinks.

KDE Control Center sees the device as:
Bus 0, device 13, function 0:
Multimedia video controller: Zoran Corporation ZR36057PQC Video cutting chipset (rev2).
IRQ 11.
Master Capable. Latency=32. Min Gnt=2.Max Lat= 16
Non-prefetchable 32 bit memory at 0xea002000 [0xea002fff]

I believe that is all correct.

Tested with avicap and Xawtv in root and a userID. Xawtv rror message in root is:
can't open /dev/v4l/video0: no such device.
Error message from avicap in root is:
Error opening V4Lxdevice /dev/video: No such device.

From userID messages are slightly different:
Xawtv ads: Permission denied to above error message.
Avicap gives Permission denied in place of "no such device."

Any help with this would be greatly appreciated. As noted above, this hardware configuration worked as recently as last week with RH7.2, so I'm pretty sure the problem is not there.

Thanks in advance for any help with this problem.

- GTR -
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BonezTheGoon
Bodhisattva
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Joined: 14 Jun 2002
Posts: 1375
Location: Albuquerque, NM -- birthplace of Microsoft and Gentoo

PostPosted: Thu Jul 11, 2002 8:07 pm    Post subject: Reply with quote

If you are running the DevFS you really shouldn't need to bother with mknod and other such hassles with adding hardware support. You might want to look into this documentation regarding devfs which could help you on your quest!!!

Check it out here --->http://www-106.ibm.com/developerworks/library/l-fs4.html

That's an article written by Daniel Robbins (Gentoo creator) and is very good!

I hope this helps!!! Please remember to post your results for others! Good luck!

Regards,
BonezTheGoon
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grakker
Tux's lil' helper
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Joined: 17 Apr 2002
Posts: 100

PostPosted: Thu Jul 11, 2002 10:19 pm    Post subject: Reply with quote

Yes, look in /etc/devfs.conf for v4l entry. If it's not there, do a quick search. I set this up a couple months ago under devfs and it worked easy.
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gtroland
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Joined: 09 Jul 2002
Posts: 74

PostPosted: Fri Jul 12, 2002 4:15 am    Post subject: Reply with quote

Thanks for the feedback guys. I'll post a results when I get this working.

- GTR -
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Disquiet
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Joined: 14 Jun 2002
Posts: 48
Location: Christchurch, New Zealand

PostPosted: Fri Jul 12, 2002 8:36 pm    Post subject: Reply with quote

Here's how I got it working:

In devfs.conf add:
Code:
REGISTER        v4l/.*       PERMISSIONS root.audio 660


It means v4l is belongs to the audio group...which you'll have to belong to anyway if you want any sound.

Then all you need is to load the correct modules:
In modules.autoload
Code:
tuner type=5
bttv


Just make sure you have all the v4l modules compiled...you should get these with a lsmod:
Code:
tvaudio                11232   0  (autoclean) (unused)
bttv                   68064   0
i2c-algo-bit            7180   1  [bttv]
videodev                5856   2  [bttv]
tuner                   8388   1
i2c-core               13056   0  [tvaudio bttv i2c-algo-bit tuner]
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gtroland
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Joined: 09 Jul 2002
Posts: 74

PostPosted: Sun Jul 14, 2002 12:07 am    Post subject: No Luck Reply with quote

Thanks for the feedback Disquiet. Unfortunately, I still can't get this working.

What card are you using?

As much as I like my old DC10+, the vendor has discontinued it and I don't think the kernel maintainers have much interest in supporting it. I had this working with the 2.4.7 and 2.2.16 kernels (way back when). Probably easier for me to just replace it with a new card that is still actively supported.

Thanks again for your reply.

- GTR -
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Huw in Nice
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Joined: 06 Jun 2002
Posts: 7
Location: Nice France

PostPosted: Thu Jul 18, 2002 8:05 pm    Post subject: Reply with quote

Hi,

I am new to Gentoo and the only thing I still can not do that I managed in other distros with earlier kernels is watch TV. Which might not be a bad thing as my French is not too hot :) so I can not understand it all

this is my dmesg output which after a post install gets the MSP3400 module. Gets the right tuner & card

bttv: Bt8xx card found (0).
bttv0: Bt848 (rev 18) at 00:0a.0, irq: 5, latency: 32, memory: 0xdddff000
bttv0: using: BT848A(Pinnacle PCTV Studio/Ra) [card=39,insmod option]
i2c-core.o: adapter bt848 #0 registered as adapter 0.
bttv0: i2c: checking for MSP34xx @ 0x80... not found
bttv0: miro: id=9 tuner=3 radio=no stereo=no
bttv0: i2c: checking for MSP34xx @ 0x80... not found
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
tvaudio: TV audio decoder + audio/video mux driver
tvaudio: known chips: tda9840,tda9873h,tda9874h/a,tda9850,tda9855,tea6300,tea6420,tda8425,pic16c54 (PV951)
i2c-core.o: driver generic i2c audio driver registered.
i2c-core.o: driver i2c TV tuner driver registered.
tuner: probing bt848 #0 i2c adapter [id=0x10005]
tuner: chip found @ 0xc0
bttv0: i2c attach [client=Philips SECAM,ok]
i2c-core.o: client [Philips SECAM] registered to adapter [bt848 #0](pos. 0).
bttv0: registered device video0
bttv0: registered device vbi0
i2c-core.o: driver i2c msp3400 driver registered.
PCI: Setting latency timer of device 00:11.5 to 64
NVRM: AGPGART: VIA Apollo KT133 chipset
NVRM: AGPGART: aperture: 128M @ 0xe0000000
NVRM: AGPGART: aperture mapped from 0xe0000000 to 0xe1a06000
NVRM: AGPGART: mode 4x
NVRM: AGPGART: allocated 16 pages
spurious 8259A interrupt: IRQ7.
bttv0: PLL: 28636363 => 35468950 ... oops
bttv0: PLL: 28636363 => 35468950 ... oops
bttv0: PLL: 28636363 => 35468950 ... oops

this lsmod output

Module Size Used by Tainted: P
snd-pcm-oss 36228 0
snd-mixer-oss 9536 1 [snd-pcm-oss]
snd-via8233 5124 1
snd-pcm 51872 0 [snd-pcm-oss snd-via8233]
snd-timer 11328 0 [snd-pcm]
snd-ac97-codec 24004 0 [snd-via8233]
snd 26952 0 [snd-pcm-oss snd-mixer-oss snd-via8233 snd-pcm snd-timer snd-ac97-codec]
msp3400 14512 0 (unused)
tuner 8388 1 (autoclean)
tvaudio 11232 0 (autoclean) (unused)
bttv 68064 0
videodev 4224 2 [bttv]
i2c-algo-bit 7180 1 [bttv]
i2c-core 13024 0 [msp3400 tuner tvaudio bttv i2c-algo-bit]
NVdriver 989344 10
3c59x 25384 1
vfat 10844 1 (autoclean)
fat 32888 0 (autoclean) [vfat]
ntfs 50176 1 (autoclean)

modules autoload

3c59x
NVdriver
options bttv card=39 pll=1 radio=0
options tuner type=3 debug=1
options msp3400 once=1 simple=1
post-install bttv modprobe tuner; modprobe videodev
options i2c-core i2c_debug=1
options i2c-algo-bit bit_test=1
snd-via8233
snd-pcm-oss

& modules.devfs


# Video capture devices
alias /dev/video* /dev/v4l
alias /dev/vbi* /dev/v4l

When I launch xawtv it thrashes the cpu until it finds a channel but shows a fuzzy picture. Athough it works with a camera input perfectly.

Hope someone can help I am sure it is a simple mistake on my behalf, any pointers greatly appreciated.

Might be able to improve my French too :)

Thanks
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