--- Alan Stern <[EMAIL PROTECTED]> wrote: > On Tue, 13 Sep 2005, Leslie Katz wrote: > > > > It should be /sys/module/usbcore/parameters/usbfs_snoop (this may > > > vary > > > depending on which version of the kernel you use). And maybe "1" > > > would be > > > better than "y"; I'm not sure. But basically, yes. > > > > > > At any rate, when a subsystem has been compiled into the kernel > > > instead of > > > built as a module, you can set parameters for it on the boot > command > > > line. > > > For instance, you could interactively edit the grub boot > parameters > > > when > > > you start up, and add > > > > > > usbcore.usbfs_snoop=1 > > > > > > to the end of the line. That would have the desired effect. > > Actually, it turns out that either way will work. Of course, if you > put > the parameter on the boot command then the change will take effect as > soon > as you boot. > > > Here is a summary of what I've tried to do in accordance with your > > request. > > > > I booted up with the camera plugged in. > > > > Immediately after booting up, I looked at the dmesg output. It may > be > > worth reporting the following lines: > > > > "usb 3-2: new full speed USB device using uhci_hcd and address 2 > > usb 3-2: device not accepting address 2, error -71 > > usb 3-2: new full speed USB device using uhci_hcd and address 3 > > usb 3-2: device not accepting address 3, error -71 > > usb 3-2: new full speed USB device using uhci_hcd and address 4 > > usb 3-2: device descriptor read/64, error -71 > > usb 3-2: device descriptor read/64, error -71 > > usb 3-2: new full speed USB device using uhci_hcd and address 5 > > usb 3-2: device descriptor read/64, error -71 > > usb 3-2: device descriptor read/64, error -71" > > > > After bootup, I asked gphoto2 to auto-detect the camera. It didn't. > I > > No wonder, since the camera was never initialized properly. > > > unplugged the camera and plugged it back in. gphoto2 then detected > the > > camera correctly, but would not download any images. > > Odd that it should initialize after booting but not while booting... > > > I checked dmesg after that and found one new line added to the end. > It > > said, "usb 3-2: new full speed USB device using uhci_hcd and > address > > 6". > > > > I edited /boot/grub/grub.conf. What I think were the relevant lines > > said beforehand, > > > > "title Fedora Core (2.6.11-1.35_FC3) > > root (hd1,0) > > kernel /vmlinuz-2.6.11-1.35_FC3 ro root=LABEL=/ rhgb quiet > > acpi=off" > > > > I added a space and then "usbcore.usbfs_snoop=1" after "acpi=off". > > > > I rebooted with the camera still plugged in. > > > > I ran dmesg. Again there were a series of lines about errors re usb > > 3-2, but they differed from the lines the first time. I then > followed > > the steps I'd followed before amending grub.conf: failed > auto-detect, > > unplug camera, plug back in, gphoto2 auto-detects now, but won't > > download, I look at dmesg, nothing more than the line, "usb 3-2: > new > > full speed USB device using uhci_hcd and address 6", which I take > to be > > the result of having unplugged the camera and plugged it back in. > There > > was no new information as a result of my amendment of grub.conf. > > > > I next amended grub.conf, sustituting a "y" for the "1" I'd earlier > > tried. I rebooted and went through all of the steps above, with > exactly > > the same result as before. Only one line was added to dmesg, the > one > > that acknowledged the replugging of the camera. > > > > It's plain that I'm not doing what needs to be done to get > usbfs_snoop > > working. Having tried setting the thing by using "1" and then "y", > I've > > got no additional information at all. > > > > Can it be that I haven't inserted the information at the > appropriate > > point in my grub.conf file? Apart from raising that, I don't know > what > > else to think. > > As far as I can see, you're doing everything correctly. For now, > don't > worry about what happens when the camera is plugged in a boot time; > just > concentrate on the problems when the camera is plugged in later. > > You can easily test whether your "usbfs_snoop=y" has worked by > running > "lsusb -v". That should cause a lot of snoop messages to show up in > the > dmesg log, even if you don't have any USB devices plugged in. If > you're > running at a text console (not an X window) and as root you do > > echo 9 >/proc/sys/kernel/printk > > then you will see those snoop messages interspersed with the output > from > lsusb. Or you could run "lsusb -v >/dev/null", in which case you'd > see > nothing but the snoop messages. > > Give me some time to download the libgphoto2 source code and look > through > it. I'll get back to you about it. > > Alan Stern > > Hello again, Alan.
I believe I've obtained the information you wanted me to obtain. I unplugged, not only the DSC, but also a webcam and a flashdrive, so that I had no devices plugged into any USB port on the computer. I rebooted. I plugged in the DSC. That added the following line at the end of the dmesg output: "usb 3-2: new full speed USB device using uhci_hcd and address 2". I then ran, as root, "/sbin/lsusb -v". That added the following lines to the dmesg output: "usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 4 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 256 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 2 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 9 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 9 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 9 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 9 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 9 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 9 ret -71 usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd lsusb rqt 128 rq 6 len 4 ret -71" I understand that I may not hear from you again about this for some time. Thanks again, Leslie Send instant messages to your online friends http://au.messenger.yahoo.com ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
