I've been running the latest precise kern now for over 6h without
problems.
However, passing 'intel_iommu=on' to the kernel command line does make
the problem re-appear. So this indeed seems to be a bug in the intel
iommu driver.
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@Reinhard
We intend to keep iommu disabled by default. So it appears this bug is
resolved since you have to purposely enable intel_iommu to make the bug
come back.
I will mark the bug as Fix Release since it is resolved in the latest
Precise kernel.
** Changed in: linux (Ubuntu)
Status:
On Mo, Feb 27, 2012 at 19:02:19 (CET), Joseph Salisbury wrote:
We intend to keep iommu disabled by default. So it appears this bug is
resolved since you have to purposely enable intel_iommu to make the bug
come back.
I'm glad to hear that!
I will mark the bug as Fix Release since it is
I enjoyed working with you as well, Reinhard!
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Title:
Linux 3.2 freezes system on FUJITSU ESPRIMO P7935
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This kernel appears to be GOOD:
root@faui49i:~# uname -a
Linux faui49i 3.2.0-1-generic #1~lp914161v5 SMP Thu Feb 23 16:45:58 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
root@faui49i:~ $ uptime
09:49:46 up 43 min, 1 user, load average: 0.00, 0.01, 0.05
I'll continue running this kernel for rest
Actually a really quick test would be to boot back with the latest precise
kernel, but use the following boot option:
intel_iommu=off
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Title:
Thanks, Reinhard.
I'm building one additional kernel. This v6 kernel will have the following
re-enable:
CONFIG_IRQ_REMAP=y
CONFIG_INTEGRITY=y
I will leave the following options disabled still to confirm they are the cause
of this bug:
CONFIG_INTEL_IOMMU
CONFIG_INTEL_IOMMU_DEFAULT_ON
Unfortunately, I have to leave now for the weekend and will be able to
restart testing on monday.
Nevertheless, I've booted the latest precise kernel without
intel_iommu=off to verify that the bug still persists:
root@faui49i:~# uname -a
Linux faui49i 3.2.0-17-generic #26-Ubuntu SMP Fri Feb 17
Still BAD:
root@faui49i:~# uname -a
Linux faui49i 3.2.0-1-generic #1~lp914161v4 SMP Tue Feb 21 22:42:16 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
This kernel again hangs after a couple of minutes of uptime.
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Thanks for the update.
That's a bit of good news that the v4 kernel is bad, since the v2 kernel
was good. I enabled the following config parameters in the v4 kernel:
CONFIG_IRQ_REMAP=y
CONFIG_INTEGRITY=y
CONFIG_INTEL_IOMMU=y
I created another test kernel, which is available at:
http://people.canonical.com/~jsalisbury/lp914161
Can you test that kernel and report back if the bug still exists or not?
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I created another test kernel, which is available at:
http://people.canonical.com/~jsalisbury/lp914161
Can you test that kernel and report back if the bug still exists or not?
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hm. If I had to guess, I would pick CONFIG_USB_XHCI_HCD. Is there a
command-line option to disable this driver at boot time?
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Title:
Linux 3.2
There is no way to disable that specific option. However, I can build a
test kernel with just that option disabled. I'll post a link to it
shortly.
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I created another test kernel, which is available at:
http://people.canonical.com/~jsalisbury/lp914161
This test kernel has the CONFIG_USB_XHCI_HCD option set to m, which is
how it is set in v3.1.0-2.3.
Can you test that kernel and report back if the bug still exists or not?
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Hmrpf. wrong pick, this kernel again triggers the symptom after a couple
of minutes:
unaroot@faui49i:~# uname -a
Linux faui49i 3.2.0-1-generic #1~lp914161v3 SMP Tue Feb 21 16:26:36 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
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Thanks for the update, Reinhard. It was definitely worth a test. I'll
continue to bisect the kernel config options and have another test
kernel built shortly.
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the first of the two testkernel seems to be GOOD:
uname -a
Linux faui49i 3.2.0-1-generic #1~lp914161v1 SMP Thu Feb 16 21:16:57 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
tartler-@faui49i:~
Also the 'v2' kernel seems to be GOOD:
root@faui49i:~# uname -a
Linux faui49i 3.2.0-1-generic #1~lp914161v2 SMP Fri Feb 17 20:45:25 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
root@faui49i:~# uptime
13:35:44 up 49 min, 1 user, load average: 0.00, 0.01, 0.05
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I created another test kernel, which is available at:
http://people.canonical.com/~jsalisbury/lp914161
Can you test that kernel and report back if the bug still exists or not?
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I've been running the kernel from
http://people.canonical.com/~jsalisbury/lp914161/ kernel for over 3h
now, and it does not exhibit the bug:
uname -a
Linux faui49i 3.2.0-1-generic #1~lp914161v1 SMP Thu Feb 16 21:16:57 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
uptime
15:26:09 up 3:19, 1 user,
As an extra saftey check, I've tried kernel v3.2.0-1.1 again, and it
exposed the bug after a couple of minutes of uptime.
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Title:
Linux 3.2
That means that a config file change between 3.1.0-2.3 and 3.2.0-1.1
caused this bug.
When the bug happens, do you get any output on the screen? It would be
very helpful if we could capture a trace or a screen shot of the panic.
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Unfortunately, there isn't any output of the screen. No matter if in X
or on the console, the screen just freezes in the sense that it is not
updated anymore and the content at the time of the freeze becomes
static. There is no visual corruption in X11 either.
I'm not even sure if the kernel
Thanks for the update, Reinhard.
I will bisect through the kernel config options to identify which
specific one is causing this bug. I will have another test kernel
posted shortly.
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It looks like the following config file changes were made between
v3.1.0-2.3 and v3.2.0-1.1:
* [Config] enforcer -- ensure CONFIG_FAT_FS is built-in on arm
* [Config] Enable PCI_IOV on powerpc
* [Config] Temporarily disable CONFIG_PASEMI_MAC on powerpc
* [Config] updateconfigs after
I created a test kernel, which is available at:
http://people.canonical.com/~jsalisbury/lp914161
Can you test that kernel and report back if the bug still exists or not?
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Is there anything else I could collect data-wise?
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Title:
Linux 3.2 freezes system on FUJITSU ESPRIMO P7935
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Hi Reinhard,
Sorry for the delay. I will build some additional test kernels to
continue the bisect. I'll post a link to the test kernel shortly.
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Oneiric with the kernel from
https://launchpad.net/ubuntu/+source/linux/3.2.0-1.1 does trigger this
issue
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Title:
Linux 3.2 freezes system on
Oneiric with the kernel from
https://launchpad.net/ubuntu/precise/amd64/linux-image-3.1.0-2-generic/3.1.0-2.3
does not seem to trigger this issue.
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That is interesting. Kernel 3.2.0-1.3 was re-based to upstream
v3.2-rc2. I recall you did not hit this bug when testing mainline
v3.2-rc4, in comment #36.
There are all of the kernels for Precise listed on the page:
https://launchpad.net/ubuntu/precise/+source/linux
Would it be possible for
On Do, Jan 26, 2012 at 18:34:59 (CET), Joseph Salisbury wrote:
This would indicate the issue is caused in the kernel config files,
since that is the only difference between these two kernels. I'll do a
diff of the config files to see what all the differences are.
Right, that also seems
To make things more interesting, I've just tested
https://launchpad.net/ubuntu/precise/amd64/linux-
image-3.2.0-1-generic/3.2.0-1.3 on this machine and that kernel also
exhibits the described symptoms above.
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Reinhard,
This would indicate the issue is caused in the kernel config files,
since that is the only difference between these two kernels. I'll do a
diff of the config files to see what all the differences are.
One additional test would be to test 3.2.0-3.7 vs 3.2.0-2.6, since
3.2.0-2.7 was
Hi Joseph,
I have tested the following two kernels just today:
v3.2-rc4-oneiric GOOD
v3.2-rc4-precise BAD
I'm happy to test additional test kernels on my test machine. Thank you
so much for investigating this issue, since we have a pool with a number
of machines of this type.
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Reinhard, thanks for all the testing.
Can you confirm the following:
v3.2-rc2-oneiric GOOD
v3.2-rc4-oneiric GOOD
v3.2-rc4-precise BAD
v3.2-rc5-precise BAD
I'll see what changes there are between v3.2-rc4-oneiric and
v3.2-rc4-precise. I'll also perform a bisect if needed and generate
some test
Sorry, the symptoms still happens with 3.2.0-9.16.
As indicated above, I suspect a toolchain issue.
** Tags removed: kernel-request-3.2.0-8.14 kernel-request-3.2.0-8.15
kernel-request-3.2.0-9.16 precise
** Tags added: bot-stop-nagging
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** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Title:
Linux 3.2 freezes system on FUJITSU ESPRIMO P7935
To manage
Thank you for taking the time to file a bug report on this issue.
However, given the number of bugs that the Kernel Team receives during
any development cycle it is impossible for us to review them all.
Therefore, we occasionally resort to using automated bots to request
further testing. This is
Oneiric with the kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2-rc6-precise/ does trigger this issue.
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Title:
Linux 3.2 freezes
Oneric with kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.1.8-precise/ does not seem to trigger this issue.
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Title:
Linux 3.2
Oneric with kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/daily/2012-01-12-precise/ does trigger this issue.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Oneiric with kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2-rc1-oneiric/ does not seem to trigger this issue.
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Title:
Linux 3.2
Oneiric with kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2-rc2-oneiric/ does not seem to trigger this issue.
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Title:
Linux 3.2
Oneiric with kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2-rc4-oneiric/ does not seem to trigger this issue.
note, I didn't test rc3 because that kernel failed to build an no
packages are available.
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Oneiric with the kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2-rc5-precise/ does trigger this issue
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Title:
Linux 3.2 freezes
Interestingly this issue *is* reproducible with http://kernel.ubuntu.com
/~kernel-ppa/mainline/v3.2-rc4-precise/
Does this indicate that the issue is toolchain related?
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I did reinstall the same machine with debian/wheezy and was unable to
reproduce this with the kernel from experimental:
Linux faui49i 3.2.0-rc7-amd64 #1 SMP Wed Dec 28 14:29:59 UTC 2011 x86_64
GNU/Linux
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Installing the kernel from http://kernel.ubuntu.com/~kernel-
ppa/mainline/daily/2012-01-09-precise/ does trigger this bug again.
Maybe the bug was introduced after 3.2.0-rc7?
I'm reinstalling ubuntu oneiric again and will test with kernels from
Thanks for the update. It would be great to know if running 3.2.0-rc6
makes the bug go away. If it does not, it would be great if you can
test some prior rc kernels, to identify when the regression was
introduced.
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Thank you for taking the time to file a bug report on this issue.
However, given the number of bugs that the Kernel Team receives during
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Therefore, we occasionally resort to using automated bots to request
further testing. This is
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Title:
Linux 3.2 freezes system on FUJITSU ESPRIMO P7935
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this bug may be related to or duplicate of bugs #891830 and #911210
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Title:
Linux 3.2 freezes system on FUJITSU ESPRIMO P7935
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** Summary changed:
- Linux 3.2 freezes system
+ Linux 3.2 freezes system on FUJITSU ESPRIMO P7935
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Title:
Linux 3.2 freezes system on FUJITSU
The problem still persists with mainline kernels downloaded from
http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2012-01-09-precise/
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Title:
apport information
** Tags added: apport-collected
** Description changed:
The system was upgraded from ubuntu oneiric to precise.
After booting kernel 3.2, the system locks up completely after a couple
of minutes of uptime. The time is long enough to log in graphically and
** Tags added: kernel-da-key regression-release
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Title:
Linux 3.2 freezes system on FUJITSU ESPRIMO P7935
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