> simon@xxxxxxxxxxxxxx wrote: >> Hi I am using a v4l2 usb video capturer (em28xx based), and it is >> working >> fine for around 5 minutes. However, it stops capturing after this time. >> >> There is no error message sent to kmsg ot the application, which >> apparently waits for more data to be received. >> >> The debug dump from usbmon is: >> > <snip usbmon dump> > >> >> I am using kernel 2.6.34-rc7, and now the E messages are shown. In >> kernels >> 2.6.33 and 2.6.32 the bus went on sending callbacks with 0s. >> I assume that there is still some work in progress on the ehci module, >> and >> eventually this issue will be solved. >> >> Also, when I stop the application the following message is shown: >> >> em28xx #0: cannot change alternate number to 0 (error=-110) >> > > Which processor and which board are you running this on? What is the > transceiver you are using? (We had issues due to inadequate capacitance > on some power rails, and poor board design). This could be one source > of your problem. > > Then again, you might be hitting an OMAP errata. > > Are you able to use the device after you load the EHCI module again? > > - Anand > I am using gumstix overo air board. I am using a hub attached to the overo, and the capturer attached to the device. Once I reload the ehci-hcd module, I have to replug either the usb hub or the capturer so that it is detected again by ehci. I mean, when I reload the ehci-hcd module the root hub is detected, but not the devices attached to it. Thanks, Simon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
