Re: [pwc] USB Timeout with Kernel 2.6.11.12 (tangent)

[James Barabas <>]

I'm working on an arm system that only has 2.4 kernel support, and  
I'm also having trouble with control request timeouts. In my case, I  
think there may be an unresolvable hardware issue, but I've had some  
success with wrapping control request code in the PWC driver with  
retry loops so that occasional timeouts don't break everything.  
Although this log looks like none of the requests are getting through  
at all, I wonder if in general it would make sense to add retry code  
to the PWC driver. Luc, would you be interested in adding the retry  
code if I submitted a patch?
-Jim

On Jun 15, 2005, at 9:14 AM, Matthias Strack wrote:

> Hi,
>
> i just upgraded my Kernel to 2.6.11.12 on a Debian Sarge System.
> The module 10.0.7a seems to compile fine, but when i load it, ill  
> get some strange timeouts:
> Jun 15 15:10:02 cucumber kernel: pwc Philips webcam module version  
> 10.0.7-unofficial loaded.
> Jun 15 15:10:02 cucumber kernel: pwc Supports Philips PCA645/646,  
> PCVC675/680/690, PCVC720[40]/730/740/750 & PCVC830/840.
> Jun 15 15:10:02 cucumber kernel: pwc Also supports the Askey VC010,  
> various Logitech Quickcams, Samsung MPC-C10 and MPC-C30,
> Jun 15 15:10:02 cucumber kernel: pwc the Creative WebCam 5 & Pro  
> Ex, SOTEC Afina Eye and Visionite VCS-UC300 and VCS-UM100.
> Jun 15 15:10:02 cucumber kernel: pwc Trace options: 0x00a1
> Jun 15 15:10:02 cucumber kernel: pwc Philips PCVC730K (ToUCam Fun)/ 
> PCVC830 (ToUCam II) USB webcam detected.
> Jun 15 15:10:07 cucumber kernel: usb 1-2.1: modprobe timed out on  
> ep0in
> Jun 15 15:10:12 cucumber kernel: usb 1-2.1: modprobe timed out on  
> ep0in
> Jun 15 15:10:12 cucumber kernel: usb 1-2.1: string descriptor 0  
> read error: -110
> Jun 15 15:10:12 cucumber kernel: pwc Registered as /dev/video0.
> Jun 15 15:10:12 cucumber kernel: usbcore: registered new driver  
> Philips webcam
> My Webcam App camE cant get an Image from the Cam...
>
> Jun 15 15:11:46 cucumber kernel: usb 1-2.1: camE timed out on ep0out
> Jun 15 15:11:46 cucumber kernel: pwc Failed to set LED on/off time.
> Jun 15 15:11:46 cucumber kernel: pwc set_video_mode(176x144 @ 10,  
> palette 15).
> Jun 15 15:11:46 cucumber kernel: pwc decode_size = 1.
> Jun 15 15:11:46 cucumber kernel: pwc Using alternate setting 1.
> Jun 15 15:11:47 cucumber kernel: usb 1-2.1: camE timed out on ep0out
> Jun 15 15:11:47 cucumber kernel: pwc Failed to set video mode  
>  fps; return code = -110
> Jun 15 15:11:47 cucumber kernel: pwc set_video_mode(160x120 @ 10,  
> palette 15).
> Jun 15 15:11:47 cucumber kernel: pwc decode_size = 1.
> Jun 15 15:11:47 cucumber kernel: pwc Using alternate setting 1.
> Jun 15 15:11:48 cucumber kernel: usb 1-2.1: camE timed out on ep0out
> Jun 15 15:11:48 cucumber kernel: pwc Failed to set video mode  
>  fps; return code = -110
> Any hints whats wrong?
> The Cam worked fine under 2.6.11.6 until this morning.
>
> Regards....
>
>
> --
> Matthias Strack <>
> http://www.bobbes.de/
> ICQ: 115177798
> Jabber: 
> GPG Key: 0xde3c07d7
>
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