Re: [Bugme-new] [Bug 16050] New: The ibmcam driver is not working

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 05/29/2010 12:46 AM, Andrew Morton wrote:
>
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Tue, 25 May 2010 23:02:23 GMT
> bugzilla-daemon@bugzilla.kernel.org wrote:
>
>> https://bugzilla.kernel.org/show_bug.cgi?id=16050
>>
>>                 URL: https://bugzilla.redhat.com/show_bug.cgi?id=588900
>>             Summary: The ibmcam driver is not working
>>             Product: Drivers
>>             Version: 2.5
>>      Kernel Version: 2.6.34
>>            Platform: All
>>          OS/Version: Linux
>>                Tree: Mainline
>>              Status: NEW
>>            Severity: normal
>>            Priority: P1
>>           Component: USB
>>          AssignedTo: greg@kroah.com
>>          ReportedBy: davidsen@tmr.com
>>          Regression: Yes
>>
>>
>> This driver has been working, and around the 1st of May I updated my Fedora
>> kernel (FC13-RC) to current. The camera stopped working, so I built the latest
>> 2.6.34-rc version and verified the problem. When 2.6.34 final released I
>> repeated the test and the driver is still not working.
>>
>> Originally reported against Fedora (not going to be fixed in FC13) the
>> information in the Fedora report may be enough to identify the problem. I can
>> do a bit of test almost any day, but the cams are on a video monitoring system,
>> so I'm not able to do long bisects and such.
>>
>
> It's a 2.6.33 ->  2.6.34 regression, I think.  I don't know whether it's
> a v4l problem or a USB one..
>

It may very well be a regression, I don't know. But in general the usbvideo drivers
(of which the ibmcam is one) have been unmaintained for a long while, and they are
still v4l1 drivers. I've been slowly working on converting all old v4l1 usb webcam
drivers to the gspca usb webcam driver framework, removing a lot of code duplication
(and other cruft such as controls being controlled through module parameters)
from these drivers and making them v4l2 drivers in the progress.

I really bough 2 ibmcam driver using webcams in the US and had them shipped to the
Netherlands esp. for this purpose. I hope to have a new gspca subdriver to replace
ibmcam soon.

I know this is not really a fix for the problems with the existing ibmcam driver, but
as it is destined to be replaced soon anyways I think this is the best way forward.

Regards,

Hans