Comment 0 for bug 1060268

This problem affected me in 12.04 as seen here (Problem behaves the same) : https://bugs.launchpad.net/ubuntu/+source/linux/+bug/961618 and behaves like this one too: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/856496

Basically the error output starts and after around 45 minutes of errors the whole system freezes. Complete freeze that I have to force reboot.

I upgraded to Ubuntu 12.10 Beta2 since the problem was mentioned to be solved in Kernel 3.4 as seen here: https://bugzilla.kernel.org/show_bug.cgi?id=42976

As you can see in the information provided, I am using the 3.5 version of the Kernel and the problem persists and it happens at least 2 to 5 times daily. It happens more if I watch a youtube video, downoad through torrent or try to connect to any online bandwidth consuming site or app.

Here is a couple of the error logs from syslog:

 DMA: Out of SW-IOMMU space for 490 bytes at device 0000:03:02.0
 DMA: Out of SW-IOMMU space for 517 bytes at device 0000:03:02.0
 DMA: Out of SW-IOMMU space for 561 bytes at device 0000:03:00.0
 DMA: Out of SW-IOMMU space for 562 bytes at device 0000:03:02.0
 DMA: Out of SW-IOMMU space for 607 bytes at device 0000:03:02.0
 DMA: Out of SW-IOMMU space for 670 bytes at device 0000:03:02.0
 DMA: Out of SW-IOMMU space for 89 bytes at device 0000:03:02.0
 DMA: Out of SW-IOMMU space for 92 bytes at device 0000:03:00.0
 DMA: Out of SW-IOMMU space for 94 bytes at device 0000:03:02.0
 DMA: Out of SW-IOMMU space for 97 bytes at device 0000:03:02.0

Looking at the PCI ID I did a sort|uniq and found the following other network devices giving the same problem:

03:02.0 Network controller: Ralink corp. RT2800 802.11n PCI

03:00.0 Network controller: Broadcom Corporation BCM4321 802.11b/g/n (rev 01)

I have 4 network cards:

       product: 82579V Gigabit Network Connection (Internal Intel DZ68DB Motherboard Wired Card)
       product: BCM4321 802.11b/g/n (Broadcom Chipset, Linksys WMP300N http://homesupport.cisco.com/en-us/support/adapters/WMP300N
       product: RTL8169 PCI Gigabit Ethernet Controller (PCI Realtek Wired Card)
       product: RT2800 802.11n PCI (Wifi-N Ralink 2 Antennas)

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-manager 0.9.6.0-0ubuntu7
ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4
Uname: Linux 3.5.0-16-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.6.1-0ubuntu1
Architecture: amd64
Date: Tue Oct 2 10:21:42 2012
ExecutablePath: /usr/sbin/NetworkManager
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.1)
IpRoute:
 default via 192.168.1.1 dev wlan0 proto static
 169.254.0.0/16 dev wlan0 scope link metric 1000
 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.5 metric 9
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: network-manager
UpgradeStatus: Upgraded to quantal on 2012-10-01 (1 days ago)
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2012-09-12T16:03:17.935620
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/3
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/2
 eth2 802-11-wireless disconnected /org/freedesktop/NetworkManager/Devices/1
 eth1 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.6.0 connected enabled enabled enabled enabled disabled