UÅytkownik Laurent Pinchart napisaÅ: > Hi, > > On Wednesday 02 March 2011 16:57:05 W.P. wrote: > >> Hi there, >> I just got an Creative VGA (640x480) USB Live Webcam, VF0520. >> >> lsusb (partial): >> >> Bus 003 Device 007: ID 041e:406c Creative Technology, Ltd >> Device Descriptor: >> bLength 18 >> bDescriptorType 1 >> bcdUSB 2.00 >> bDeviceClass 239 Miscellaneous Device >> bDeviceSubClass 2 ? >> bDeviceProtocol 1 Interface Association >> bMaxPacketSize0 64 >> idVendor 0x041e Creative Technology, Ltd >> idProduct 0x406c >> bcdDevice 10.19 >> iManufacturer 1 Creative Labs >> iProduct 3 VF0520 Live! Cam Sync >> iSerial 0 >> bNumConfigurations 1 >> >> lsmod | grep vid: >> uvcvideo 50184 0 >> compat_ioctl32 5120 1 uvcvideo >> videodev 32000 1 uvcvideo >> v4l1_compat 15876 2 uvcvideo,videodev >> >> uname -a (kernel from Fedora 10): >> [root@laurent-home ~]# uname -a >> Linux laurent-home 2.6.27.5-117.fc10.i686 #1 SMP Tue Nov 18 12:19:59 EST >> 2008 i686 athlon i386 GNU/Linux >> >> Problem: device nodes are created, but NO video in gmplayer, tvtime >> complains: can't open /dev/video0. >> >> Only trace in syslog is: >> >> Mar 2 16:26:56 laurent-home kernel: uvcvideo: Failed to submit URB 0 >> (-28). >> > > This means the webcam requires more USB bandwidth than available. Another > device probably uses USB bandwidth (it could be another webcam, an audio > device, ...). > > It is the only USB 2.0 device connected (rest are keyboard, mouse, 2x PL2303 converters, BT, and WiFi (unused). But what is strange: it seems device runs in 1.1 mode: Mar 3 15:54:46 laurent-home kernel: usb 3-1.4: new full speed USB device using uhci_hcd and address 24 Mar 3 15:54:47 laurent-home kernel: usb 3-1.4: *not running at top speed*; conne ct to a high speed hub Mar 3 15:54:47 laurent-home kernel: usb 3-1.4: configuration #1 chosen from 1 choice Mar 3 15:54:47 laurent-home kernel: uvcvideo: Found UVC 1.00 device VF0520 Liv e! Cam Sync (041e:406c) Mar 3 15:54:47 laurent-home kernel: uvcvideo: Found a valid video chain (1 -> 2). Mar 3 15:54:47 laurent-home kernel: input: VF0520 Live! Cam Sync as /devices/p ci0000:00/0000:00:0b.1/usb3/3-1/3-1.4/3-1.4:1.0/input/input19 Mar 3 15:54:47 laurent-home kernel: usb 3-1.4: New USB device found, idVendor= 041e, idProduct=406c Mar 3 15:54:47 laurent-home kernel: usb 3-1.4: New USB device strings: Mfr=1, Product=3, SerialNumber=0 Mar 3 15:54:47 laurent-home kernel: usb 3-1.4: Product: VF0520 Live! Cam Sync Mar 3 15:54:47 laurent-home kernel: usb 3-1.4: Manufacturer: Creative Labs But I have tested it with 2 hubs on different controller ports, same. >> Webcam is connected to VIA USB 2.0 controller through a USB 2.0 hub. >> >> What is strange, two days ago I tried apparently the same (model VFxxxx) >> with SUCCESS. >> Device seems working in Windoze (Ekiga). >> >> What should I check/ do? >> Only switching OS (for test) and it works. WTF? W.P. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
