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I believe I'm also suffering from this issue; however, I've found a
workaround: boot the kernel with the iommu=pt parameter. From what I can
tell, this allows the iommu to function in the presence of an NVidia
graphics card.
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Ubuntu beta2 lastest 3.0.2.21 and pre3.0.2.22 still the same problem
The screen goes black, no login screen and after 30 seconds, able to
swich to tty
Solution by now: disable iommu on my GA-990FXA-UD3 motherboard bios
Not a solution at all if i want to continue using pci pastrough and etc
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so i finally get a computer with an IOMMU switch in BIOS, but turning it "on"
causes ubuntu to go to sleep at boot.
things go wrong between plymouth and lightdm.
the only way out is [SYSRQ]+R,E,I,S,U,B or cutting the power.
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Thanks for the testing, much appreciated. I intend to apply this
alternative solution and upload shortly. Thanks.
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Title:
IOMMU error loop early
@Leann: no loop, no excessive DMAR messages being issued:
[cerdea-aws]cerdea@xango3$ cat /proc/version_signature
Ubuntu 3.2.0-9.17~lp894070v1-generic 3.2.1
[cerdea-aws]cerdea@xango3$ dmesg|grep DMAR
[0.00] ACPI: DMAR cf34ff18 00080 (v01 INTEL CP_DALE 0001
INTL 0001)
[
Hi,
I've built an alternative test kernel which reverts the out of tree
patch we applied and instead disables CONFIG_INTEL_IOMMU_DEFAULT_ON.
Could you please test this kernel and let me know your results, ie.
confirm the loop of DMAR error messages do not reappear. Thanks in
advance.
http://peop
** Branch linked: lp:ubuntu/linux-ti-omap4
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Title:
IOMMU error loop early in boot
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This bug was fixed in the package linux - 3.2.0-4.10
---
linux (3.2.0-4.10) precise; urgency=low
[ Kyle McMartin ]
* SAUCE: dmar: disable if ricoh multifunction detected
- LP: #894070
[ Seth Forshee ]
* SAUCE: dell-wmi: Demote unknown WMI event message to pr_debug
-
** Changed in: linux (Ubuntu)
Status: Triaged => Fix Committed
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Title:
IOMMU error loop early in boot
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Well job! works fine on i7-950/ASUS P6X58D-E and GTX-260.
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Title:
IOMMU error loop early in boot
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ht
** Tags removed: kernel-da-key kernel-key
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Title:
IOMMU error loop early in boot
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** Tags added: rls-p-tracking
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Leann Ogasawara (leannogasawara)
** Changed in: linux (Ubuntu)
Milestone: None => precise-alpha-2
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Sarvatt's test kernel works. We have a deal :-)
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Title:
IOMMU error loop early in boot
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git commit that caused issue:
fe763ab898670195870b889e145483ce5c8997d5 UBUNTU: [Config] CONFIG_MEMSTICK_R592=m
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Title:
IOMMU error loop early in b
Test kernel with that patch applied. What it does is disable intel_iommu
when it finds one of the 4 ricoh devices because it leads to problems
like this.
http://kernel.ubuntu.com/~sarvatt/lp894070/
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04:00.0 maps to your sd reader. The mainline kernels were using older
configs, and 3.2 in precise enabled CONFIG_MEMSTICK_R592 which hggdh's
SD reader device on 04:00.0 is using. It looks like this patch may fix
it.
http://pkgs.fedoraproject.org/gitweb/?p=kernel.git;a=blob;f=dmar-disable-when-
1. Ubuntu 3.1.0-2.3 -- works. This is the last 3.1 kernel I installed on this
machine
2. Mainline 3.2-rc1 -- works
3. Mainline 3.2-rc2 -- works.
OTOH I lost wireless on the 3.2 mainline.
Still to test 3.1 mainline
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In my prior comment I meant the 3.1.0-2.3 kernel:
https://launchpad.net/ubuntu/+source/linux/3.1.0-2.3/+build/2885386
I would also like to have you test a couple of mainline kernels, to rule
out an Ubuntu patch as a cause. Can you test with the upstream v3.1
kernel and upstream v3.2-rc2 kernel?
Hi Carlos,
Can you also confirm that this was not an issue with the the Ubuntu
3.1.0-1.3 kernel? That way we have a starting point for the bisect.
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(for the record, already answered on IRC)
Tested, still fails. Interesting that the RH bugs talk about VT-d. I do
not remember if this laptop BIOS has VT-d as an option (I am sure it has
a VT, probably VT-x). OTOH, it can be argued if the options displayed on
BIOS have a direct relation with reali
Hi Carlos,
I'm going to do some bisecting to identify when the bug was introduced.
Before starting, could you test the 3.2.0-2.5 kernel just to see if it
happens to be fixed?
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Just adding upstream thread for additional information.
https://lkml.org/lkml/2010/5/22/69
For now I suggest you continue to use the workaround of
'intel_iommu=off' until we are able to investigate further.
** Bug watch added: Red Hat Bugzilla #605888
https://bugzilla.redhat.com/show_bug.cgi?
Hi Carlos,
I've added this bug to the kernel team hotlist:
http://reports.qa.ubuntu.com/reports/kernel-bugs/reports/_kernel_hot_.html
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Title:
IOM
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged
** Tags added: kernel-da-key
** Changed in: linux (Ubuntu)
Importance: Medium => High
** Tags added: kernel-key
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** Attachment added: "short video of boot console"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/894070/+attachment/2606188/+files/VID_2021_151323.3gp
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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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Title:
IOMMU error loop early in boot
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** Attachment added: "snapshot of the error"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/894070/+attachment/2606186/+files/IMG_2022_140534.jpg
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Title:
IOMMU error loop early in boot
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