The UVC video driver lacks the VIDIOCGMBUF ioctl and this limits the software it can work with.
This problem can easily be reproduced as follows. Note the error it gets for the VIDIOCGMBUF ioctl.
dcampbel@vostro:~$ hasciicam
HasciiCam 0.9.1 - (h)ascii 4 the masses! - http://ascii.dyne.org
(c)2000-2003 Denis Rojo < jaromil @ dyne.org >
watch out for the (h)ASCII ROOTS http://hascii.org
Device detected is /dev/video0
Integrated Webcam
1 channels detected
max size w[1280] h[1024] - min size w[48] h[32]
Video capabilities:
VID_TYPE_CAPTURE can capture to memory
!! error in ioctl VIDIOCGMBUF: : Invalid argument
This is a right-up-to-date Intrepid....
root@vostro:~# lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dcampbel 3923 F.... pulseaudio
/dev/snd/pcmC0D0p: dcampbel 3923 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf8300000 irq 48'
Mixer name : 'Realtek ALC268'
Components : 'HDA:10ec0268,10280275,00100003'
Controls : 12
Simple ctrls : 7
DistroRelease: Ubuntu 10.10
HibernationDevice: RESUME=UUID=6acbb5ef-566a-41e9-8ec1-ef4d0ab03fa6
MachineType: Dell Inc. Vostro1710
NonfreeKernelModules: nvidia
Package: linux (not installed)
ProcCmdLine: root=UUID=de3674a2-2543-4e51-95ea-70f61cbad1ba ro quiet splash
ProcEnviron:
PATH=(custom, no user)
LANG=en_AU.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Regression: No
RelatedPackageVersions: linux-firmware 1.38
Reproducible: Yes
Tags: maverick kernel-graphics needs-upstream-testing
Uname: Linux 2.6.35-22-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 10/09/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 0X805C
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnDellInc.:bvrA10:bd10/09/2008:svnDellInc.:pnVostro1710:pvrNull:rvnDellInc.:rn0X805C:rvr:cvnDellInc.:ct8:cvrN/A:
dmi.product.name: Vostro1710
dmi.product.version: Null
dmi.sys.vendor: Dell Inc.
same error in up-to-date ubuntustudio 9.04.