From: j <jlafontaine@ctecworld.com>
To: Devin Heitmueller <dheitmueller@kernellabs.com>
Cc: "video4linux-list@redhat.com" <video4linux-list@redhat.com>
Subject: Re: Chronic USB disconnect events for Pinnacle Dazzle DVC 100 video capture device
Date: Thu, 25 Feb 2010 14:27:01 -0500 [thread overview]
Message-ID: <4B86CF05.3@ctecworld.com> (raw)
In-Reply-To: <829197381002251107v68f8cd87q90345de5715f6cc@mail.gmail.com>
Devin Heitmueller wrote:
> On Thu, Feb 25, 2010 at 1:52 PM, Ben Swartzlander <ben@swartzlander.org> wrote:
>
>> I have a Pinnacle Dazzle DVC 100 USB video capture device hooked up to a
>> security camera capturing video 24/7. A few times a month, my kernel
>> suddenly decides that the USB device was disconnected and reconnected,
>> resulting in the device getting a new number and causing my recording
>> software to stop recording until I restart it with the new device number.
>> Here is an example of the dmesg output when it happens:
>>
>
> The USB host controller might be going to sleep if the PC's
> suspend/resume kicked in. Or, is there a USB hub involved which might
> have been power cycled? It's pretty hard to figure out *why* the
> hardware decided to disconnect the USB device.
>
> The reason the device gets a new device number is because it is still
> in use when the disconnect occurs. If the application were not
> running at the time of the disconnect event, you would get the same
> device number.
>
> Also, it's probably worth mentioning that these sorts of devices are
> not really designed for capture 24/7, so it might be overheating or
> some bug in the hardware.
>
> Devin
>
>
try to update to ubuntu 9.04 from 8.10 this solve my problem
but I think I need to modprobe blacklist any usb keu that need the ehci
(usb2)
or it kicks my em2860 vstream to usb1 hub
8.10 = my ehci was loaded after ohci
9.04 = ehci loaded before all the time
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prev parent reply other threads:[~2010-02-25 19:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-25 18:52 Chronic USB disconnect events for Pinnacle Dazzle DVC 100 video capture device Ben Swartzlander
2010-02-25 19:07 ` Devin Heitmueller
2010-02-25 19:27 ` j [this message]
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