Bart Hi,
The errors you are getting are usually from old modules still laying around.
try following the v4l-dvb installation how-to:
http://www.linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers#First_Use:_Out_with_the_Old.2C_In_with_the_New

take special attention to the Special case (compressed kernel modules)
in the Unresolved Symbols section


Best regards,
Paulo

2010/3/5 Bart Koppe <b...@a-bort.org>:
> Hi List,
>
> I'm making a media installation. One screen shows video streams from several
> webcams in the world, another screen shows you watching these streams.
>
> Basically i have two issues that I need to solve. One caused by the install
> (or something I did wrong during that process)
> To make my Microsoft Lifecam Cinema HD (not really a fan of MS, but that's
> what i got) stream live video I installed the dev version of uvc-video.
> After I booted my PC this morning unfortunatly vloopback stopped working.
>
> The other issue I could ask in a separate email, basically i can record the
> webcam output, but not stream it.
>
> Thanks,
>
> Bart
>
>
>
> Some outputs according vloopback (the suggestions I found elsewhere to just
> reboot don't work):
>
> # modprobe vloopback
> FATAL: Error inserting vloopback
> (/lib/modules/2.6.26-2-686/kernel/drivers/misc/vloopback.ko): Unknown symbol
> in module, or unknown parameter (see dmesg)
>
> dmesg shows:
> [ 2216.742102] vloopback: disagrees about version of symbol video_devdata
> [ 2216.742102] vloopback: Unknown symbol video_devdata
> [ 2216.742102] vloopback: disagrees about version of symbol
> video_unregister_device
> [ 2216.742102] vloopback: Unknown symbol video_unregister_device
> [ 2216.742205] vloopback: disagrees about version of symbol
> video_device_alloc
> [ 2216.742210] vloopback: Unknown symbol video_device_alloc
> [ 2216.742293] vloopback: disagrees about version of symbol
> video_register_device
> [ 2216.742298] vloopback: Unknown symbol video_register_device
> [ 2216.742370] vloopback: disagrees about version of symbol
> video_device_release
> [ 2216.742370] vloopback: Unknown symbol video_device_release
>
> # cat /proc/version
> Linux version 2.6.26-2-686 (Debian 2.6.26-21lenny3) (da...@debian.org) (gcc
> version 4.1.3 20080704 (prerelease) (Debian 4.1.2-25)) #1 SMP Wed Feb 10
> 08:59:21 UTC 2010
>
> # cat /proc/modules
> nvidia 7086148 34 - Live 0xf942f000 (P)
> agpgart 28808 1 nvidia, Live 0xf8a6d000
> tun 8292 1 - Live 0xf8a50000
> ppdev 6468 0 - Live 0xf8a4d000
> lp 8164 0 - Live 0xf8a4a000
> ipv6 235396 24 - Live 0xf8c73000
> powernow_k8 12036 0 - Live 0xf89fc000
> cpufreq_powersave 1856 0 - Live 0xf89e3000
> cpufreq_userspace 3172 0 - Live 0xf8945000
> cpufreq_conservative 5960 0 - Live 0xf8a0c000
> cpufreq_ondemand 6476 2 - Live 0xf89f6000
> cpufreq_stats 3776 0 - Live 0xf8830000
> freq_table 4224 3 powernow_k8,cpufreq_ondemand,cpufreq_stats, Live
> 0xf89f9000
> fuse 42908 1 - Live 0xf8a56000
> compat_ioctl32 1248 0 - Live 0xf8918000
> loop 12748 0 - Live 0xf8a07000
> parport_pc 22500 1 - Live 0xf8a00000
> parport 30988 3 ppdev,lp,parport_pc, Live 0xf89da000
> snd_hda_intel 325720 0 - Live 0xf8a90000
> snd_usb_audio 70272 0 - Live 0xf8a10000
> snd_usb_lib 13472 1 snd_usb_audio, Live 0xf89d5000
> shpchp 25528 0 - Live 0xf89ba000
> snd_pcm 62660 2 snd_hda_intel,snd_usb_audio, Live 0xf89e5000
> snd_seq_midi 5728 0 - Live 0xf8947000
> pci_hotplug 23460 1 shpchp, Live 0xf89a6000
> pcspkr 2432 0 - Live 0xf88b6000
> snd_seq_midi_event 6432 1 snd_seq_midi, Live 0xf898c000
> snd_rawmidi 18496 2 snd_usb_lib,snd_seq_midi, Live 0xf89b4000
> snd_hwdep 6212 1 snd_usb_audio, Live 0xf8951000
> snd_seq 41456 2 snd_seq_midi,snd_seq_midi_event, Live 0xf89c3000
> snd_timer 17800 2 snd_pcm,snd_seq, Live 0xf89ae000
> uvcvideo 51692 0 - Live 0xf897e000
> snd_seq_device 6380 3 snd_seq_midi,snd_rawmidi,snd_seq, Live 0xf894e000
> videodev 34656 1 uvcvideo, Live 0xf899c000
> snd 45636 8
> snd_hda_intel,snd_usb_audio,snd_pcm,snd_rawmidi,snd_hwdep,snd_seq,snd_timer,snd_seq_device,
> Live 0xf898f000
> v4l1_compat 11524 2 uvcvideo,videodev, Live 0xf894a000
> snd_page_alloc 7816 2 snd_hda_intel,snd_pcm, Live 0xf893e000
> soundcore 6368 1 snd, Live 0xf8942000
> ftdi_sio 44296 1 - Live 0xf8955000
> usbserial 26472 3 ftdi_sio, Live 0xf88ae000
> i2c_core 19828 2 nvidia,videodev, Live 0xf8895000
> wmi 6440 0 - Live 0xf88ab000
> button 6096 0 - Live 0xf88a8000
> evdev 8000 4 - Live 0xf884b000
> ext3 105576 2 - Live 0xf8963000
> jbd 39476 1 ext3, Live 0xf8933000
> mbcache 7108 1 ext3, Live 0xf8865000
> sd_mod 22200 4 - Live 0xf8911000
> usbhid 35904 0 - Live 0xf8907000
> hid 33184 1 usbhid, Live 0xf88fd000
> ff_memless 4392 1 usbhid, Live 0xf8892000
> ide_pci_generic 3908 0 [permanent], Live 0xf8852000
> amd74xx 7752 0 [permanent], Live 0xf8824000
> ide_core 96168 2 ide_pci_generic,amd74xx, Live 0xf891a000
> forcedeth 45072 0 - Live 0xf889b000
> ata_generic 4676 0 - Live 0xf884f000
> ahci 23596 3 - Live 0xf885e000
> libata 140448 2 ata_generic,ahci, Live 0xf88d9000
> scsi_mod 129548 2 sd_mod,libata, Live 0xf88b8000
> dock 8304 1 libata, Live 0xf8832000
> ehci_hcd 28428 0 - Live 0xf8856000
> ohci_hcd 18500 0 - Live 0xf8845000
> usbcore 118192 9
> snd_usb_audio,snd_usb_lib,uvcvideo,ftdi_sio,usbserial,usbhid,ehci_hcd,ohci_hcd,
> Live 0xf886d000
> thermal 15228 0 - Live 0xf8836000
> processor 32576 2 powernow_k8,thermal, Live 0xf883c000
> fan 4196 0 - Live 0xf8827000
> thermal_sys 10856 3 thermal,processor,fan, Live 0xf882a000
>
>
> --
> -----/\/\/\/\/\/\-----
> Bart Koppe
> bk at a-bort dot org
> http://a-bort.org
> -----\/\/\/\/\/\/-----
>
> I love deadlines. I like the whooshing sound they make as they fly by.
-
> Douglas Adams
> _______________________________________________
> Linux-uvc-devel mailing list
> Linux-uvc-devel@lists.berlios.de
> https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
>
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