Jim and Antonio, Thanks very much for the suggestions! I got it working with luvcview! See below for some details. Jim Paris wrote: > Antonio Ospite wrote: >> before doing any further investigation about code in 2.6.29.4, forgive >> the silly question: is using a more recent kernel/driver an option for >> you? >> >> I've just tried latest code from v4l-dvb and it "just works" with the >> applications I use. You can get the mercurial repository here >> http://linuxtv.org/hg/v4l-dvb >> >> I know that there was a regression in 2.6.30 (not sure about 2.6.29.4) >> and a patch has been sent by Jim Paris to fix it, I don't know if it is >> already in a 2.6.30.x release, tho. The change is this one: >> http://patchwork.kernel.org/patch/42114/ > > I believe 2.6.29.4 should be okay. However, the Fedora folks might > have pulled some newer patches which also added the bug. You might > try a stock 2.6.29.4 kernel instead of Fedora's, or just apply the > patch that Antonio refers to (if thta's the problem). I found that Fedora 11 did indeed have the code that the patch fixes. That is, it was using a payload length of 2040 instead of 2048. I downloaded the fedora kernel source and rebuilt the kernel with the patch applied. > If your kernel does have the same bug, the symptoms would be as you > described, with the camera's red LED turning on during an attempted > capture. Do you get the red LED? Yes, I get the red LED. > You would also probably see the same problem, regardless of kernel > version, if the camera were connected to a full-speed instead of > high-speed USB port. I checked, and the USB port is high speed and the camera connects at high speed. usbtree reports: /: Bus 05.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M /: Bus 04.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M |_ Port 2: Dev 2, If 0, Prod=Dell USB Mouse, Class=HID, Drv=usbhid, 1.5M /: Bus 03.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M |_ Port 2: Dev 2, If 0, Prod=DELL USB Keyboard, Class=HID, Drv=usbhid, 1.5M /: Bus 02.Port 1: Dev 1, Class=root_hub, Drv=uhci_hcd/2p, 12M /: Bus 01.Port 1: Dev 1, Class=root_hub, Drv=ehci_hcd/8p, 480M |_ Port 8: Dev 10, If 0, Prod=USB Camera-B4.04.27.1, Class=vend., Drv=ov534, 480M |_ Port 8: Dev 10, If 1, Prod=, Class=audio, Drv=snd-usb-audio, 480M |_ Port 8: Dev 10, If 2, Prod=, Class=audio, Drv=snd-usb-audio, 480M >> I tested the driver with "mplayer" and "luvcview" during development, >> and I am now using it with "cheese", I've never run v4l-test. > > Agreed. luvcview is probably the easiest to test with, and I can > provide command lines for mplayer, ffmpeg, etc, if necessary. I had 2 test programs. One runs OK and one still hangs (probably a bug on my part since I'm new with v4l.) Cheese and luvcview work great. Thanks very much for your help! -- Tim ============================= Tim Bird Architecture Group Chair, CE Linux Forum Senior Staff Engineer, Sony Corporation of America ============================= -- 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
