Solution for Webcam sleep & back problems after the upgrade to Windows 7

Just thought I'd share the solution I recently found a problem I've had since a Satellite Pro A200 GE 26 Q of the upgrade from Vista to Windows 7.

I installed the software webcam for windows 7 on the toshiba site and built-in Chicony camera would work very well after a reboot, but if the computer is in sleep for a long enough period, the unit would stay asleep when the computer woke up and wouldn't work at all, unless the computer has fully restarted.

The solution lies in a change in the registry to force the computer to update the webcam USB controller is attached, after the release of sleep. It was apparently the default for Vista when it was released, but was changed in Vista SP1 and Windows 7. Designed for Vista original material which did not have its drivers/registry updated entries could therefore be subject to a failure because of changes to the default settings through the updates of windows. Toshiba, it seems, do not think that this issue then of the extinction of the registry fix for Win7 upgrades for the satellite Pro A200. Therefore fix manually.

The article where the solution is here: [http://support.microsoft.com/kb/928631]

You do NOT have the file of the fix, you must only make the change to the registry described later.

You need turn on the camera while you do the following to make sure that it appears in Device Manager correctly.

Step 1: Determine the specific USB host controller


# Click on * early *, enter devmgmt.msc #the * search * box, then click on * devmgmt.msc* in the * list of programs.
# The * view * menu, click on * devices of * connection *.
# Expand the processor node. For example, expand * ACPI * Multiprocessor PC *. (In my case, * ACPI x 86 based PC) *.
# Extend * system compatible ACPI Microsoft *.
# Extend * PCI Bus *. Several USB host controllers will be listed.
# Expand each USB host controller node, and then expand successive subnodes until you find the name of the device that is failing. For example, the device entry might look like the following: ACPI Multiprocessor PC\Microsoft ACPI-Compliant System\PCI Bus\Intel (R) \ICH8 family USB Universal Host Controller - drive root Hub\fingerprint 2830\USB * (Note: for me, I found the webcam to ACPI x 86 PC\Microsoft ACPI-Compliant System\PCI Bus\Intel (R) \ICH8 family USB2 Enhanced Host Controller - 283A\USB Root Hub + USB Composite Device\Chicony USB 2.0 Camera-based) *.
# When you have located the device, right click on the associated and then USB host controller click on * properties *. In the example that is listed in step 6 you would right-click * Intel(r) ICH8 Family USB Universal Host Controller-* 2830, then click on * properties *. (* Again, for me it was different - ICH8 Family USB2 Enhanced Host Controller - 283 a *).
# Click on the * details * tab.
# Select * pilot key * in the list. The driver key will look like the following. Note the last four digits of this driver key. {36fc9e60-c465-11cf-8056-444553540000} \0002 * (on my system it's: (36fc9e60-c465-11cf-8056-444553540000) \0005*).

Step 2: Add the ForceHCResetOnResume registry value for the USB host controller


# Click on * early *, type regedit #in the * search * box, then click on * regedit.exe* in the * list of programs.
# Find and then click the registry subkeys that are similar to the following: * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contr ol\Class{36FC9E60-C465-11CF-8056-444553540000}\Four-digit_number.* in this step, the numero_a_quatre_chiffres is a placeholder for the USB devices in the system.
# You must search the registry subkey by using the value that you noted in step 9 above. For example, if the key of the pilot to step 9 is * {36fc9e60-c465-11cf-8056-444553540000} \0002*, then you need to get * HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contr ol\Class {36FC9E60-C465-11CF-8056-444553540000} \0002. (For me, as mentioned above, this was \0005 (36fc9e60-c465-11cf-8056-444553540000)). *

# On the * Edit * menu, point on * New * and then click on * DWORD value *.
# Type# * ForceHCResetOnResume * to the name of the DWORD and then press ENTER.
# Right click * ForceHCResetOnResume * and then click on * edit *.
# In the * boite box the value data, type# 1 and then click on * OK *.
# Exit the registry editor.
# Restart the computer.

This fixed the problem for a long time for me. I'm writing this in case it helps someone else who has the same problem. If anyone from Toshiba never reads this, you might consider adding the registry fixes for upgrades of windows 7 on the download page for this & all other models affected.

Big Hey what s announced and detailed, thank you! :)
I m wondering how you discovered it.

But I want to add something: before you make or change something in the Windows registry, make a backup of it. In the worst cases, restore you the old Windows registry. Just to be sure ;)

Tags: Toshiba

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