Re: Loginwindow crash on usb audio device plug/unplug
Re: Loginwindow crash on usb audio device plug/unplug
- Subject: Re: Loginwindow crash on usb audio device plug/unplug
- From: Bill Stewart <email@hidden>
- Date: Fri, 05 Jul 2002 22:04:32 -0700
And remember we're talking QT 6 PUBLIC PREVIEW - one reason we do these is
to catch problems, and if you install public preview's etc, you're
intstalling software that isn't GM, so can be expected to have problems
(otherwise, it would be GM and wouldn't have any problems:)
Bill
on 7/3/02 7:58 PM, Jeff Moore wrote:
>
On Wednesday, July 3, 2002, at 07:08 PM, Dave Koziol wrote:
>
>
>> From: Jeff Moore <email@hidden>
>
>>
>
>> On Wednesday, July 3, 2002, at 06:42 AM, Dave Koziol wrote:
>
>>
>
>>> Several very popular USB WebCams with USB Audio support are causing
>
>>> loginwindow to crash when the are plugged in or unplugged. The crash
>
>>> happens in a call to CFStringCompare in
>
>>> HALComponentHelper::DeviceIsNowAvailable(), which is part of a
>
>>> XIOAudioDeviceManager::NotificationThread. This is logged in RADAR
>
>>> as
>
>>> # 2973082.
>
>>>
>
>>> I'm wondering if anyone can tell me what string the
>
>>> HALComponentHelper
>
>>> is trying to use? I'm wondering if I can stop using the
>
>>> AppleUSBAudio.kext, and replace it with my own kext which sets
>
>>> whatever string is missing, to make this crash go away.
>
>>
>
>> This is a bug in the new Sound Manager in the QuickTime 6 Public
>
>> Preview. The quick work-around is to uninstall QT6. The harder
>
>> work-around would be to replace the QT6 Sound Manager pieces with the
>
>> originals.
>
>
>
> Ok, that's good to know, but it doesn't answer my real question.
>
>
>
> As the developer of a driver for a product with lots of user
>
> complaining about this bug, is there anything I can change that might
>
> provide a work around for all of our users?
>
>
Nope. The bug isn't in the driver or really has anything to do with the
>
drivers. It's in the Sound Manager.
>
>
> In other words, is there a string I can set in the registry for a
>
> kext? Is there something I can change by replacing the
>
> AppleUSBAudio.kext with my own code? What is the string which this
>
> code is trying to use?
>
>
It's nothing you can fix in a driver. The only work-arounds are:
>
1) Don't hot-plug USB audio devices and wait for the final release of
>
QT6.
>
2) Uninstall QT6.
>
3) Replace the QT6 Sound Manager with the stock one.
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