DMA: Out of SW-IOMMU space on 8GB RAM Intel Mobile 4 Series Chipset Laptop due to wired ethernet (jme)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Incomplete
|
Undecided
|
Unassigned |
Bug Description
Installed Ubuntu 11.04 on a brand new laptop with 8GB RAM. Set off Update Manager in an update and upgrade cycle.
Within a minute, experiencing constant kernel errors in dmesg:
DMA: Out of SW-IOMMU space for 8124 bytes at device 0000:08:00.0
(The number of bytes varies.)
Immediately network traffic ceases and the root filesystem remounts ro. (Note I have also experienced root filesystem corruption.)
Booting with mem=3G, prevents the issue so it appears to be a problem that occurs with 4-8GB RAM and this chipset.
Upgraded kernel to latest 2.6.38-11-generic; the problem persists.
Tried cmdlines intel_iommu=off and iommu=off, no change, laptop won't boot with iommu=off and stops at initramfs prompt. Also tried BIOS OS options 'Other' and 'Windows 7 / Vista' (default), no change.
Laptop has Intel Corportation Mobile 4 Series Chipset.
Attaching lspci etc.
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
tags: | added: natty |
References - similar but not identical bugs and forum posts:
https:/ /bugs.edge. launchpad. net/mactel- support/ +bug/267089 /bugzilla. redhat. com/show_ bug.cgi? id=471329 ubuntuforums. org/showthread. php?t=1652837
https:/
http://
I wish I could get on bugzilla.kernel.org its very relevant here and I can't find a cache or mirror :/