linux-kernel - Re: [Bug 10345] USB HID problems after resume

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Message-ID: <47EFD1F1.8010501@rtr.ca>
Date:	Sun, 30 Mar 2008 13:46:25 -0400
From:	Mark Lord <lkml@....ca>
To:	Pavel Machek <pavel@....cz>
Cc:	bugme-daemon@...zilla.kernel.org, rjw@...k.pl, bunk@...nel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org
Subject: Re: [Bug 10345] USB HID problems after resume

Pavel Machek wrote:
> On Sat 2008-03-29 13:15:40, Mark Lord wrote:
>..
>> Just happened again.  The machine resumed from RAM with no functioning USB.
>> Still running the exact same 2.6.25-rc7 kernel as before, with the RTC conflict fixed.
>>
>> WTF?
> 
>> 3GB of RAM? Try iommu=soft.
..

What does that option do (it is not in Documentation/kernel-parameters.txt),
and why do you suspect it may make a difference here?

Thanks
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