Hi Jean-Christophe, On Saturday 29 December 2007, Jean-Christophe Jice Cardot wrote: > Le vendredi 28 décembre 2007, Laurent Pinchart a écrit : > > That doesn't look good. Do the 'USB disconnect' messages appear on their > > own when you're not doing anything, or are they printed only when you try > > to use the webcam ? Please try to plug the camera in another port and see > > if it helps. > > here it is. after the ">", the lines from dmesg. > > rmmod uvcvideo (ro remove the old version) > > >usbcore: deregistering driver uvcvideo > > insmod ./uvcvideo.ko > > >uvcvideo: Found UVC 1.00 device Philips SPC 1000NC Webcam (0471:0332) > >usbcore: registered new driver uvcvideo > >USB Video Class driver (v0.1.0) > > press the camera button > > >uvcvideo: Button event (1). > >uvcvideo: Button event (0). > > [EMAIL PROTECTED] luvcview-20070512]$ ./luvcview -d /dev/video1 > luvcview version 0.2.1 > Video driver: x11 > A window manager is available > video /dev/video1 > > Stop asked > Clean Up done Quit > > >nothing in dmesg > > [EMAIL PROTECTED] luvcview-20070512]$ ./luvcview -d /dev/video1 > luvcview version 0.2.1 > Video driver: x11 > A window manager is available > video /dev/video1 > Unable to dequeue buffer (5). > Error grabbing > Clean Up done Quit > > >usb 1-1: USB disconnect, address 2 > >usb 1-1: new high speed USB device using ehci_hcd and address 3 > >usb 1-1: configuration #1 chosen from 1 choice > >uvcvideo: Found UVC 1.00 device Philips SPC 1000NC Webcam (0471:0332) > >3:3:1: cannot get freq at ep 0x84 > > also, /dev/video1 has been recreated: > > it was: > >crw-rw---- 1 fred video 81, 1 2007-12-29 12:12 /dev/v4l/video1 > > and is now, after the failure: > >crw-rw---- 1 fred video 81, 1 2007-12-29 12:25 /dev/v4l/video1 > > note the change in the time. > > again a failure of luvcview: > >usb 1-1: USB disconnect, address 3 > >usb 1-1: new high speed USB device using ehci_hcd and address 4 > >usb 1-1: configuration #1 chosen from 1 choice > >uvcvideo: Found UVC 1.00 device Philips SPC 1000NC Webcam (0471:0332) > >4:3:1: cannot get freq at ep 0x84 > > then another: > >usb 1-1: USB disconnect, address 4 > >usb 1-1: new high speed USB device using ehci_hcd and address 5 > >usb 1-1: configuration #1 chosen from 1 choice > >uvcvideo: Found UVC 1.00 device Philips SPC 1000NC Webcam (0471:0332) > >5:3:1: cannot get freq at ep 0x84 > > then it works (and nothing in dmesg). > > there is no logical suite in the failures and successes (like 2 failures > then one success). > > so let's try to change the plug: > > unplug: > >usb 1-1: USB disconnect, address 13 > > plug: > >usb 1-3: new high speed USB device using ehci_hcd and address 14 > >usb 1-3: configuration #1 chosen from 1 choice > >uvcvideo: Found UVC 1.00 device Philips SPC 1000NC Webcam (0471:0332) > >14:3:1: cannot get freq at ep 0x84 > > again luvcview fails then works then fails then fails... > > >usb 1-3: USB disconnect, address 14 > >usb 1-3: new high speed USB device using ehci_hcd and address 15 > >usb 1-3: configuration #1 chosen from 1 choice > >uvcvideo: Found UVC 1.00 device Philips SPC 1000NC Webcam (0471:0332) > >15:3:1: cannot get freq at ep 0x84 > > ok, this was my only usb2 controller, so let's try a USB1 controller: > >usb 1-3: USB disconnect, address 15 > >usb 5-2: new full speed USB device using uhci_hcd and address 4 > >usb 5-2: not running at top speed; connect to a high speed hub > >usb 5-2: configuration #1 chosen from 1 choice > >uvcvideo: Found UVC 1.00 device Philips SPC 1000NC Webcam (0471:0332) > >4:3:1: cannot get freq at ep 0x84 > > surprise! luvcview always work properly! and with the same fps (12). > > so now I've a work-around, but still I'd like to help it work on the USB2 > controller if it suits you, because maybe others will have the same > problem...
It looks like the camera crashes. I guess the timing is somehow wrong. It's very difficult to find a good workaround without knowing exactly why the camera crashes, and that's difficult to know without access to the firmware's source code. If you already have a workaround, and as long as nobody else experiences the issue, I'd leave it as is. > bye and have a good "fêtes de fin d'année" ! (you're speaking french, > Laurent, aren't you?) Thanks. J'espère que tu as passé de bonnes fêtes :-) Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
