Re: USB issues in fedora-27 ("can't get device qualifier: Resource temporarily unavailable") not happening when booted into CentOS-6.2, same hardware

[Tom Hodder <tom@xxxxxxxxxxxxxxxx>]

On 30 March 2018 at 04:15, Ed Greshko <ed.greshko@xxxxxxxxxxx> wrote:

The error above is being reported by the uvcvideo module which is part of the
kernel.  For informational and debugging information the first thing I would do is
determine what kernel version is in used for Centos 6.2  v.s. F27.  I'm pretty sure
they are quite different. 

The fedora box is;

$ uname -r

4.15.13-300.fc27.x86_64

and the centos 6.2 is reporting;

2.6.32-220.el6.x86_64

> The error above is being reported by the uvcvideo module which is part of the kernel.

I am getting those errors ("can't get device qualifier: Resource temporarily unavailable") , whether the webcam is plugged in or not, which seems to be a more fundamental problem. I only noticed it when trying to get this particular webcam working.

> As I mentioned above you should find the kernel version of CentOS 6.2 and potentially
> boot a live Fedora with a similar kernel

I booted a fedora-15 liveCD (kernel 2.6.38.6-26.rc1.fc15.x86_64), and I am not seeing any errors (Resource temporarily unavailable ), but none of the webcams I tried work (I tried 3, 2 of which work correctly on f-27 on this hardware)

I guess I am most concerned about the (Resource temporarily unavailable ) which would seem to be separate from the webcam issue, lsusb has only the mouse and the keyboard.... 

...no webcam plugged in .... But still lots of errors in the output;

# lsusb -v  2>&1  | grep -C2  "Resource temporarily unavailable"
     bAlternateSetting       0
     bNumEndpoints           1
     bInterfaceClass         3 Human Interface Dcan't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable

...

I've tried swapping out the mouse and they keyboard with others, but those errors remain..

 

Then, I would also check the actual make/model of the webcam and see if there have
been any firmware updates to the camera.

So I've got a new webcam which is working, and I'm happy to scrap that old webcam as broken, but I'd like to fix those errors that occur in the lsusb output....

Cheers,

Tom

 

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