linux-kernel - webcam problem after suspend/hibernate

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Date:	Tue, 30 Mar 2010 23:55:38 +0200
From:	Mohamed Ikbel Boulabiar <boulabiar@...il.com>
To:	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: webcam problem after suspend/hibernate

Hi,

After suspend/resume, I have my webcam no more working.
The /dev/video0 file still exist, but the webcam won't be used until I do this :
rmmod     uvcvideo
modprobe uvcvideo
(2.6.31.8-0.1)

This is may be caused by a bug somewhere.
These are more information about my hardware :

I have Microdia webcam
`lsusb`
Bus 001 Device 004: ID 0c45:62c0 Microdia Sonix USB 2.0 Camera

on openSUSE 11.2 `uname -a`
Linux linux-l365 2.6.31.8-0.1-desktop #1 SMP PREEMPT 2009-12-15
23:55:40 +0100 i686 i686 i386 GNU/Linux

`hwinfo --usb`
: USB 00.0: 0000 Unclassified device
  [Created at usb.122]
  UDI: /org/freedesktop/Hal/devices/usb_device_c45_62c0_1_3_2_1_7_if0_logicaldev_input
  Unique ID: Uc5H.F0c0EBqBP10
  Parent ID: k4bc.9T1GDCLyFd9
  SysFS ID: /devices/pci0000:00/0000:00:1d.7/usb1/1-4/1-4:1.0
  SysFS BusID: 1-4:1.0
  Hardware Class: unknown
  Model: "Microdia LG Webcam"
  Hotplug: USB
  Vendor: usb 0x0c45 "Microdia"
  Device: usb 0x62c0 "LG Webcam"
  Revision: "32.17"
  Serial ID: "1.3.2.1.7"
  Driver: "uvcvideo"
  Driver Modules: "uvcvideo"
  Device File: /dev/input/event8
  Device Files: /dev/input/event8, /dev/char/13:72,
/dev/input/by-id/usb-LG_Innotek_LG_Webcam_1.3.2.1.7-event-if00,
/dev/input/by-path/pci-0000:00:1d.7-usb-0:4:1.0-event
  Device Number: char 13:72
  Speed: 480 Mbps
  Module Alias: "usb:v0C45p62C0d3217dcEFdsc02dp01ic0Eisc01ip00"
  Driver Info #0:
    Driver Status: uvcvideo is active
    Driver Activation Cmd: "modprobe uvcvideo"
  Config Status: cfg=no, avail=yes, need=no, active=unknown
  Attached to: #4 (Hub)


If there is a scenario you propose me to do to detect from where comes
the problem, I can apply it.
Thanks,

ik.
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