Intermittent Logitech C510 problems (with kernel OOPSes)

Intermittent Logitech C510 problems (with kernel OOPSes)

[Artem S. Tashkinov]

Hi,

I posted a bug report almost a year ago and since it's got zero 
attention so far I'm writing to this mailing list.

My problem is that video capturing doesn't work on Logitech C510 webcam 
in some cases.

Mind that audio input always works.

Video capturing is guaranteed not to work after I reboot from Windows 7.

In rare cases it doesn't work when I cold boot straight into Linux.

When I try to capture - either there's no signal and capturing fails to 
initiate or I get a black screen (a LED on the webcam doesn't turn on in 
both cases).

If I rmmod ehci_hcd and then modprobe ehci_hcd and uvcvideo, then 
everything starts working again.

https://bugzilla.kernel.org/show_bug.cgi?id=67551


-- 
Best regards,

Artem

Re: Intermittent Logitech C510 problems (with kernel OOPSes)

[Laurent Pinchart]

Hi Artem,

On Tuesday 07 October 2014 11:48:48 Artem S. Tashkinov wrote:
> Hi,
> 
> I posted a bug report almost a year ago and since it's got zero
> attention so far I'm writing to this mailing list.

I've CC'ed the linux-media mailing list, as it wasn't in the recipients list 
of your e-mail.

> My problem is that video capturing doesn't work on Logitech C510 webcam
> in some cases.
> 
> Mind that audio input always works.
> 
> Video capturing is guaranteed not to work after I reboot from Windows 7.
> 
> In rare cases it doesn't work when I cold boot straight into Linux.
> 
> When I try to capture - either there's no signal and capturing fails to
> initiate or I get a black screen (a LED on the webcam doesn't turn on in
> both cases).
> 
> If I rmmod ehci_hcd and then modprobe ehci_hcd and uvcvideo, then
> everything starts working again.
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=67551

The kernel log warning message is caused by an issue I'm aware of. I'll try to 
fix it ASAP, but due to attending conferences next week I might get a bit 
delayed.

-- 
Regards,

Laurent Pinchart