I just thought that I would add, USB works fine if I boot with knoppix 3.9,
or with Windows XP, even with 3GB's of RAM installed. It's only if I try to
use USB mass storage devices, Fedora Core 4 64 bit, and 3GB's of RAM at the
same time that I get this issue with USB. If I change the OS to XP, but
keep the RAM at 3GB, it works fine. If I remove some RAM and only run 2GB's
of RAM, then FC4 with the 2.6.12.1 64 bit kernel works fine.
So, to sum things up:
RAM amount OS 64or32bit USB
storage works?
3GB FC4 2.6.12.1 64
no
2GB FC4 2.6.12.1 64
yes
3GB XP SP2 32
yes
2GB XP SP2 32
yes
3GB Knoppix 3.9 32
yes
2GB Knoppix 3.9 32
yes
Thanks again,
Jon
From: Andi Kleen <[email protected]>
To: "Jon Schindler" <[email protected]>
CC: [email protected]
Subject: Re: USB storage does not work with 3GB of RAM, but does with 2G of
RAM
Date: 08 Jul 2005 21:29:37 +0200
"Jon Schindler" <[email protected]> writes:
>
> This mainly seems to be an issue with USB mass storage devices like
> USB memory sticks and USB hard drives (I've tried both, and neither is
> assigned a scsi device properly). I am still able to use my USB mouse
> when I have 3GB installed. I'm not sure if that makes it a USB 1.1
> issue or a USB storage issue, but hopefully someone will have some
> insight after looking at the logs. Thanks in advance for any help.
It sounds like the Nvidia EHCI controller has trouble DMAing to high
addresses. Would be a bad bug if true.
Does it work when you disable EHCI and only enable OHCI? (this will
limit you to USB 1.1)
-Andi
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