Description of problem:
The machine is new, I'm setting it up.  Whenever I plug in a USB device, the
kernel crashes.  I've tried both a Lacie DVD writer and an Olympus digital
camera, and get the same result.

When I installed the system, I made an installation DVD and tried to install
from the DVD.  I was able to boot from it, but it couldn't find it to boot from.
 I never investigated that further, but did an FTP install instead.

If I plug the USB unit in before booting the machine, it stops with the first
line from the kernel panic stack below.

Version-Release number of selected component (if applicable):
kernel-smp-2.6.14-1.1653_FC4

How reproducible:
Every time

Steps to Reproduce:
1.Plug in a USB unit

Actual results:
Kernel panic

Expected results:
The device should show up.

Additional info:
Processor: AMD Athlon 64 X2 4400+
Motherboard: Asus A8N-E
Memory: 4 GB
lspci output:
00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3)
00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a3)
00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2)
00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2)
00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3)
00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2)
00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2)
00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3)
00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3)
00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2)
00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3)
00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0c.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)]
01:00.1 Display controller: ATI Technologies Inc RV370 [Radeon X300SE]
05:08.0 Ethernet controller: VIA Technologies, Inc. VT86C100A [Rhine] (rev 06)

Kernel stack trace:  (beware that this is written down from screen to paper, and
then from paper to a file, so there could be misspellings)

lKernel panic - not syncing: PCI-DMA: high address but no IOMMU

Call Trace:<ffffffff80134831>{panic+133} <ffffffff8012d816>{complete+57}
 <ffffffff80130a60>{try_to_wake_up+1028} <ffffffff801fbab4>{kobject_get+18}
 <ffffffff8101d535>{dma_map_simple+176} <ffffffff802ad9bd>{hcd_submit_urb+1670}
 <ffffffff8012d75a>{__wake_up+56} <ffffffff801358c0>{vprintk+887}
 <ffffffff803431b8>{_spin_lock_irqsave+9} <ffffffff802ae74b>{usb_start_wait_urb+114}
 <ffffffff80135958>{printk+78} <ffffffff802ae98d>{usb_control_msg+234}
 <ffffffff802aa67d>{hub_port_init+588} <ffffffff802ab633>{hub_trhead+1483}
 <ffffffff80149f20>{autoremove_wake_function+0} <ffffffff802ab068>{hub_thread+0}
 <ffffffff80149ad0>{keventd_create_kthread+0} <ffffffff80149d27>{kthread+203}
 <ffffffff80130f21>{schedule_tail+70} <ffffffff8010ea16>{child_rip+8}
 <ffffffff80149ad0>{keventd_create_kthread+0} <ffffffff80149c5c>{kthread+0}
 <ffffffff8010ea0e>{child_rip+0}