[mythtv-users] not registered v4l2

Jarod Wilson jarod at wilsonet.com
Wed Dec 15 06:43:39 UTC 2004

On Tuesday 14 December 2004 15:54, bic1 at optonline.net wrote:
> When I do a
> [root at amd800 sbickfor]# /bin/dmesg |grep ivtv
> ivtv: ==================== START INIT IVTV ====================
> ivtv: Initialized WinTV PVR 350, card #0
> ivtv: ====================  END INIT IVTV  ====================
> Per Wilsonet.com I should see v4l2 registered.  Obviously this isn't in
> there.

Haven't updated that section, I guess. You don't get that anymore without some 
higher debug settings for the ivtv module. Initialized card #0 is sufficient 
evidence you've got a /dev/video0 now, I believe.

> And now, when I do this, I get multiple fb0s:
> [root at amd800 sbickfor]# cat /var/log/messages |grep "iTVC15 TV out"
> Dec 13 19:40:32 amd800 kernel: ivtv-osd: fb0: iTVC15 TV out frame buffer
> device Dec 13 20:11:32 amd800 kernel: ivtv-osd: fb0: iTVC15 TV out frame
> buffer device Dec 14 18:39:27 amd800 kernel: ivtv-osd: fb0: iTVC15 TV out
> frame buffer device


> Then trying to do a:
> [root at amd800 sbickfor]# /usr/bin/ivtvctl -u 0x3000
> Failed to open /dev/video0: Cannot allocate memory
> then when I do
> ivtvctl: page allocation failure. order:5, mode:0xd0
> ....simplified....
>  [<16a99e14>] ivtv_init_buffer+0x45/0xa0 [ivtv]
>  [<16a99e86>] ivtv_init_queue_nolock+0x17/0x63 [ivtv]
>  [<16a99ef4>] ivtv_init_queues_nolock+0x22/0x3b [ivtv]
>  [<16a9e090>] ivtv_stream_alloc+0x74/0xaa [ivtv]
>  [<16a9d810>] ivtv_v4l2_open+0x2e7/0x3d8 [ivtv]
> ivtv: No memory on buffer alloc!
> ivtv: Buffer alloc failed!
> Using FC2 and wilsonet.com guide.

Check out some of the stuff in the ivtv section of the FC3 version, there's a 
fix there that might help. Ah, there it is:

echo 16384 > /proc/sys/vm/min_free_kbytes

See if that helps...

Jarod C. Wilson, RHCE
jarod at wilsonet.com

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