Re: [Spca50x-devs] [BUG] kernel stall in spca50x driver - identified

[thomas schorpp <t.schorpp@xxxxxx>]

thomas schorpp wrote:
> thomas schorpp wrote:
> 
>>thomas schorpp wrote:
>>
>>
>>>hello,
>>>
>>>touching ekiga gui video sliders triggers spurious stalls of 2.6 kernels.
>>>
>>>any clue? it occours more often on touching the contrast slider.
>>>color and hue seems not to be affected.
>>>usb seems not affected - no stall until touching sliders.
>>>
>>>this will be hard to debug since there will be no kernel oops and 
>>>no logs on serial cable console too.
>>>the kernel seems to lock up in a endless loop somewhere.
>>>
>>>2.6.15.0 K7 kernel.org
>>>aiptek dv3500 webcam mode
>>>ekiga cvs + libs cvs
>>>
>>>y
>>>tom
>>>
>>
>>
>>any grabber triggers.
>>
>>the stall seems to occur if light gets too dark (black picture).
>>
> 
> no also occurs on picture change.
> 
> 
>>here are debug logs until deadlock (serial console gets no oops, even only once so far flashing keyboard lights):
>>
>>

news:

its not the spca driver.

i connected to another usb plug and all is fine again.

seems like a bug in the 2.6.15 kernel usb drivers:

this configuration does not stall: 

tom1:~# lsusb
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 004: ID 08ca:2024 Aiptek International, Inc. Pocket DV3500
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
tom1:~#
tom1:~# lspci |grep USB
0000:00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
0000:00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
0000:00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
0000:00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
tom1:~#
tom1:~#



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