Dear Laurent, Bonne année 2008 et merci pour votre aide. Here's a follow-up to the Sanyo Xacti uvc problem. I did the following:
mount -t debugfs none_debugs /sys/kernel/debug/ modprobe usbmon lsusb Bus 007 Device 003: ID 0474:0241 Sanyo Electric Co., Ltd cat /sys/kernel/debug/usbmon/7t > WebcamStart.dump I then switch on the camera by flipping open the screen and put it into PC CAMERA mode. ctrl-c http://www.ailab.ch/~tnetter/WebcamStart.dump cat /sys/kernel/debug/usbmon/7t > WebcamClose.dump I then switch off the camera by flapping close the screen. ctrl-c http://www.ailab.ch/~tnetter/WebcamClose.dump I then load v4l modules to try out luvcview modprobe v4l2-common modprobe videodev modprobe v4l1-compat modprobe compat_ioctl32 modprobe video-buf cat /sys/kernel/debug/usbmon/7t > Webcam.dump sudo ./luvcview Open webcam. Camera image appears on screen. luvcview version 0.2.1 Video driver: x11 A window manager is available video /dev/video0 G_FMT -1 0 0 0 0 0 134612088 prepare S_FMT 1 320 240 1196444237 0 0 Closing vd->fd Clean Up done Quit http://www.ailab.ch/~tnetter/Webcam.dump Let's give it another try: cat /sys/kernel/debug/usbmon/7t > Webcam2.dump sudo ./luvcview luvcview version 0.2.1 Video driver: x11 A window manager is available video /dev/video0 G_FMT -1 0 0 0 0 0 134612088 prepare S_FMT 1 320 240 1196444237 0 0 Unable to set format: 5. Init v4L2 failed !! exit fatal http://www.ailab.ch/~tnetter/Webcam2.dump Closing the camera produces no usbmon data. Many thanks for your help, -Thomas Laurent Pinchart wrote: > On Thursday 20 December 2007, Thomas Netter wrote: >> Hi Laurent and UVC developers, >> >> I'm starting to give a close look at luvcview failures when using Xacti >> cameras with UVC. I'm new to UVC so any help would be greatly appreciated. >> The problem was initially described by Lars Täuber with the Sanyo HD 1000: >> http://lists.berlios.de/pipermail/linux-uvc-devel/2007-September/002145.htm >> l To summarize: luvcview works on the first execute-quit sequence but fails >> if you try to execute luvcview again. I tried plugging Lars Täuber's code >> snippet into uvc_driver.c but that had no visible effect. >> >> I'm experiencing the same problem with a Xacti C6. I also have access to >> Xacti C4, HD 1000, and HD 2 cameras to test on other models. >> >> Device numbers: >> Xacti HD 1000: 0474:0238 >> Xacti C6: 0474:0241 >> >> Below are logs obtained with SnoopyPro-022 while starting AMCap video >> capture on Windows XP ( http://noeld.com/programs.asp?cat=video ) >> These logs track the following sequence: >> - Start Amcap >> - Capture 2 to 3 seconds of 320x240 video >> - Quit Amcap >> - Wait a few seconds >> - Start Amcap >> - Capture 2 to 3 seconds of 320x240 video >> - Quit Amcap >> >> Log from "video device": >> Snoopy binary log: http://www.ailab.ch/~tnetter/USBLog12.usblog >> Text version: http://www.ailab.ch/~tnetter/log12.txt.gz >> >> Simultaneous log from "composite device": >> Snoopy binary log: http://www.ailab.ch/~tnetter/USBLog13.usblog >> Text version: http://www.ailab.ch/~tnetter/log13.txt.gz >> >> Here's what happens in Ubuntu 7.10, linux 2.6.22-14-generic, >> uvcvideo-r104, luvcview-20070512 (tried both from SVN and from deb >> package). >> >> First attempt works: >> sudo ./luvcview >> luvcview version 0.2.1 >> Video driver: x11 >> A window manager is available >> video /dev/video0 >> Stop asked >> Clean Up done Quit >> >> Second attempt fails: >> sudo ./luvcview >> luvcview version 0.2.1 >> Video driver: x11 >> A window manager is available >> video /dev/video0 >> Unable to set format: 5. >> Init v4L2 failed !! exit fatal >> >> If I unplug and replug the camera into the USB port then luvcview >> works again for one more attempt. >> >> Any help / hints are welcome. > > Thanks a lot for the logs. Unfortunately I won't be able to look at them > before January 7th as I'll be away next week. I'll try to debug the problem > when I'll come back. > > In the meantime, could you generate a log on Linux that includes the two > luvcview runs ? In a nutshell, to use usbmon: > > mount -t debug none /sys/kernel/debug > cat /sys/kernel/debug/usbmon/<busnr>t > usbmon.dump > > You will need debugfs and usbmon support in your kernel. > > Best regards, > > Laurent Pinchart > > _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
