Public bug reported:
Using the latest default precise kernel on my Lenovo T410s laptop with
Intel integrated graphics ends up with a bunch of messages like
[ 98.467011] DRHD: handling fault status reg 2
[ 98.467014] DMAR:[DMA Write] Request device [00:02.0] fault addr 400020000
[ 98.467038] DMAR:[fault reason 05] PTE Write access is not set
in the kernel log, and graphics seem pretty choppy. Booting with
"intel_iommu=igfx_off" makes this go away.
I see that I have the calpella device that the quirk in drivers/iommu
/intel-iommu.c keys off of:
$ lspci -nn -d 8086:0044
00:00.0 Host bridge [0600]: Intel Corporation Core Processor DRAM Controller
[8086:0044] (rev 02)
but in that quirk:
static void __devinit quirk_calpella_no_shadow_gtt(struct pci_dev *dev)
{
unsigned short ggc;
if (pci_read_config_word(dev, GGC, &ggc))
return;
if (!(ggc & GGC_MEMORY_VT_ENABLED)) {
printk(KERN_INFO "DMAR: BIOS has allocated no shadow GTT;
disabling IOMMU for graphics\n");
dmar_map_gfx = 0;
} else if (dmar_map_gfx) {
/* we have to ensure the gfx device is idle before we flush */
printk(KERN_INFO "DMAR: Disabling batched IOTLB flush on
Ironlake\n");
intel_iommu_strict = 1;
}
}
the first test apparently ends up as false, and I just see
[ 0.808010] DMAR: Disabling batched IOTLB flush on Ironlake
in my kernel log, which is apparently not sufficient to make things
actually work.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-7-generic 3.2.0-7.13
ProcVersionSignature: Ubuntu 3.2.0-7.13-generic 3.2.0-rc7
Uname: Linux 3.2.0-7-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: roland 2095 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf2520000 irq 47'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:14f15069,17aa21a4,00100302
HDA:80862804,17aa21b5,00100000'
Controls : 23
Simple ctrls : 8
Card1.Amixer.info:
Card hw:1 'CODEC'/'Burr-Brown from TI USB Audio CODEC at
usb-0000:00:1a.0-1.5.2.2, full speed'
Mixer name : 'USB Mixer'
Components : 'USB08bb:2900'
Controls : 2
Simple ctrls : 1
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
6UHT31WW-1.12'
Mixer name : 'ThinkPad EC 6UHT31WW-1.12'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Thu Jan 5 09:30:56 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120104)
MachineType: LENOVO 2901CTO
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-7-generic
root=UUID=677292b2-a7ba-4d9e-8f1a-662c546b62ce ro intel_iommu=igfx_off quiet
splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-7-generic N/A
linux-backports-modules-3.2.0-7-generic N/A
linux-firmware 1.67
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
dmi.bios.date: 10/27/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET61WW (1.41 )
dmi.board.name: 2901CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr6UET61WW(1.41):bd10/27/2010:svnLENOVO:pn2901CTO:pvrThinkPadT410s:rvnLENOVO:rn2901CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2901CTO
dmi.product.version: ThinkPad T410s
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise running-unity staging
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/912405
Title:
arrandale/5 series intel graphics on lenovo t410s requires
"intel_iommu=igfx_off" with precise/3.2 kernel
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/912405/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
