** Changed in: linux (Ubuntu Oneiric)
Status: Triaged = Won't Fix
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to
Oneiric is EOL so someone should set this to wont fix
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7
(rc6
tengo la version del kernel 3.2.3 y mi dell inspiron N4110 se recalienta
y la bateria dura muy poco
** Changed in: linux (Ubuntu Precise)
Assignee: Canonical Kernel Team (canonical-kernel-team) = victor alvarado
(vito8916)
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Please do not assign yourself to bugs unless you're actually working on
fixing them.
Thanks!
** Changed in: linux (Ubuntu Precise)
Assignee: victor alvarado (vito8916) = Canonical Kernel Team
(canonical-kernel-team)
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@Claus Strasburger See comment #64
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/818830/comments/64)
for information on how to patch an Oneiric kernel.
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Just a final question:
I am running Linux Mint 12, which is still on Oneiric.
Is this final fix embedded in any upstream kernel.org version and if so, at
which version?
Is the fix somewhere in http://kernel.ubuntu.com/~kernel-ppa/mainline/ ?
How do i get a kernel for other distro's (e.g.
** Tags removed: kernel-key
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7
(rc6 disabled)
To manage
** Changed in: ubuntu-power-consumption
Status: Confirmed = Fix Released
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Title:
[Sandy Bridge] serious power regression from kernel
Leann, I think that keeping these patches applied (and having RC6
enabled by default) in 12.04 is definitely the way to go. Just wanted to
thank you for all your help. This bug was killer for me personally, and
you were a massive help with it!
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Hi All,
Given the positive testing feedback with the RC6 patches, we intend to
keep them applied for Precise. If anyone is experiencing RC6 related
issues, please file a new bug and let us know. For now I'm marking this
power regression issue as Fix Released for Precise. As mentioned
earlier,
@Andy: yes, it is always the left edge. Do you have a bug number for me
so I can follow that as well, please?
On 03/05/2012 02:02 PM, Andy Whitcroft wrote:
@Maarten -- if you could describe when the complete visual freezes
occur, that might help. For example there is a separate known issue
@Maarten -- if you could describe when the complete visual freezes
occur, that might help. For example there is a separate known issue
where the X server locks hard due to an internal deadlock; this most
commonly occurs when touching the left edge to get the unity launcher.
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@Kevin -- the fixes should be in the latest kernel in the archive if you
update.
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Title:
[Sandy Bridge] serious power regression from kernel
Could anyone tell me where I can get 3.2.0-17.27 for precise (64bit)?
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to
3.2.0-17-generic is not completely stable for me. I get a complete
visual freeze (sound keeps working) with this kernel about twice a day.
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Title:
Hi Maarten,
Can you confirm this instability is due to RC6 (ie if you disable RC6 do
the issues go away?). If so, may I ask that you open a separate bug
report so that we can capture your specific hardware information. To
open a new bug, please run the following command:
ubuntu-bug linux
Hi Steven,
That is correct, the upstream kernel does not yet contain this patch.
As I understand it, it will be sent upstream and also submitted to
upstream-stable once there is enough testing feedback to provide a level
of confidence that there are no further regressions introduced from the
Very cool. I doubt my opinion matters a whole lot, but I think this
patch should ship with the 12.04 kernel, and RC6 (but not deep RC6)
should be enabled by default (without passing a kernel parameter
manually) for Sandy Bridge machines in 12.04. This is a HUGE power
savings, and 12.04 is a very
I'm not sure if this is of any relevance here, but I have tested the
upstream kernel (3.3.0-030300rc5-generic, http://kernel.ubuntu.com
/~kernel-ppa/mainline/v3.3-rc5-precise/), and the graphical glitches
occur in that kernel with RC6 enbled. I'm assuming that kernel does not
contain Leann's fix?
lates kernel fixes al isssues on toshiba satzellite r850-14T
im using quiet splash nmi_watchdog=0 i915.i915_enable_rc6=3
i915.lvds_downclock=1 i915.i915_enable_fbc=1 rm.vblankoffdelay=1
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I've been running with rc6 enabled for most of the precise development
cycle, and I never observed the destkop hangs but have started seeing
them recently. I can't say for certain whether or not they started with
the 3.2.0-17.26 kernel. But the machine is very much alive when it
happens; I can
Hi All,
Just to reiterate what Seth said above in comment #77. We just uploaded
a new ubuntu kernel, 3.2.0-17.27. It contains the additional fix
mentioned in comment #76. We hope this should resolve any of the
remaining issues being seen with RC6 enabled. If you could please test
and let us
I tried to test the kernel in comment #76 by installing the .deb
packages, but I got errors...Can someone help me? I'd love to test it
because I have a consistent way of triggering the freezes with the
tunerc6 kernel in comment #61. Here is the output I get when I try to
install it:
[18:24:49 |
Actually, I was still able to boot into the new 3.2.0-17.27 kernel from
comment #76 despite the installation errors. The LibreOffice freeze
still occurs. The strange thing is that it occurs with RC6 on or off
though, and it doesn't occur at all with kernel 3.0 (RC6 or not). It
seems to have no RC6
Thanks Steven. Let's have you open a new separate bug for the new issue
you are seeing. It doesn't appear to be related to the RC6 issue and
warrants a separate bug. Thanks.
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I did so here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/940771
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to
Potentially bad news: I started experiencing freezes again on my X220
with RC6 enabled and the new (tunable RC6) kernel. The freezes only
occur (so far) while using LibreOffice Calc, but they are exactly the
same types of freezes I have experienced with RC6 before. I have not yet
seen the
Yes, yesterday I was having exactly the same problem with Libre Office
Calc, RC6 and the 3.2 kernel -- off the top of my head release 17, in
the end I booted the previously installed 3.2 kernel and had no issues.
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Hi Steven and Brad,
Thanks for the additional testing and feedback.
First, if you could both really confirm this is related to RC6 by
booting the 3.2.0-17.26 kernel but disabling RC6 (boot with
i915.i915_enable_rc6=0). I just want to make sure RC6 is indeed the
culprit.
If RC6 really is the
Leann,
Excellent suggestion. I did a series of experiments, and here are my
results:
Using kernel from post #61, RC6 on: LibreOffice crashes consistently (I
tried it several times and through reboots) on one particular file when
scrolling over charts.
Using kernel from post #61, RC6 off:
It should be noted, however, that kernel 3.0.0-13 experiences graphical
glitches and RANDOM freezes with RC6 enabled, while the kernel from post
#61 is cured of those symptoms.
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Sorry for flooding you all with comments, but I just noticed some poor
word choice on my part in post #73. LibreOffice doesn't merely crash.
The entire computer freezes, and nothing responds in any way except that
the mouse pointer is still movable, and I am still able to reboot using
SysRq +
Hi Steven et al,
So there have been some new developments regarding the RC6 patch which
was applied. Upstream recently discovered an issue and has proposed the
following additional patch:
http://lists.freedesktop.org/archives/intel-
gfx/2012-February/015319.html
I apologize for asking for even
Thanks Leann.
I'd like to test it but I'm using Oneiric not Precise. Can I test it? If
so, could you please tell me where I can get the kernel for Oneiric? I'm
using Oneiric 64bit.
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Unfortunately there is no Oneiric test kernel with the patch applied
yet. We'd like to focus first on the current development kernel, ie
Precise. Should the patch prove successful, upstream intends to submit
the patch for the 3.0.y stable release and thus we would also be able to
provide it for
I'm still using Oneiric and I cannot test this kernel on Precise right
now, but for what is worth the patched kernel from comment #64 works
flawlessly on my system!
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Hi Everyone,
I see some of you have found the RC6 tunables test kernel I built. As a
follow on to that I've been in touch with upstream and have pulled in a
proposed patch which disables RC6p (deep RC6) for Sandy Bridge.
Upstream claims that RC6p is what was responsible for the reports of
So...This patched kernel is working great. Here are my concerns moving
forward: 1) We need more people to test it and report back. 2) We need
to push for this fix to be incorporated into the kernel that ships with
Ubuntu/Xubuntu 12.04 (an LTS release)! 3) I suspect that this patched
kernel does
I have tested the patched kernel for about 24 hours now, and it is
working beautifully! My battery lasts almost 50% longer (6 hours vs 4.2
hours) than with RC6 disabled, and there are NO glitches or freezes so
far!!! My CPU temperature has also been decreased HUGELY. Here's how to
test it yourself
fwiw, I have an i7-2630QM and I don't get any glitches or freezes with
rc6 enabled with either the 3.2.x or 3.3-rc3 kernels. But it's a Dell
L502x, not a Thinkpad.
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I have an X220 with the i5-2520M and still experience this issue.
On Wed, Feb 15, 2012 at 6:28 PM, Matthias Schmidt
818...@bugs.launchpad.net wrote:
@ #54: Mine has the i5-2520M CPU @ 2.50GHz CPU. No glitches and no
freezes. So it seems your different CPU causes you problems :/
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I have a Samsung i5-2520M I have glitches and freezes when rc6 enable,
testing the new patch for the last 2 days, i have none of the above.
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Title:
On my other system wich is a Samsung Core I3-2357M I still have glitches
and freezes when rc6 enable but I am not testing the new patched kernel
http://people.canonical.com/~ogasawara/eugeni/rc6/ i will try it soon to
see if the bug is fixed in that system to.
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Same here! Thanks to this patch, I don't experience graphical glitches anymore!
My machine is a Dell Inspiron 15r N5110 - i3-2310M + HD3000
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Title:
With the kernel located here:
http://people.canonical.com/~ogasawara/eugeni/rc6/ is rc6 enabled by
default, or do we have to pass a kernel parameter to it to test it? If
so, what parameter? Will test as soon as someone replies. Thanks.
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First check dmesg|fgrep -i rc6
If it is enable it's on.
If not i915.i915_enable_rc6=1
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Title:
[Sandy Bridge] serious power regression from
I have installed the 64-bit kernel from
http://people.canonical.com/~ogasawara/eugeni/rc6/ on my ThinkPad X220
and added the kernel parameter i915.i915_enable_rc6=1 (RC6 was off by
default). Power consumption was decreased by 25-50%, extremely roughly.
I will test it for several days and then
@ #52: Do you have the i5 or i7 processor? I have two X220's with i7's,
and both experience graphical glitches and (rare) freezes with rc6
enabled.
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@ #54: Mine has the i5-2520M CPU @ 2.50GHz CPU. No glitches and no
freezes. So it seems your different CPU causes you problems :/
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Title:
[Sandy
@ #50: What's the issue with your X220? I have one and my power
consumption is about 8W using WLAN (battery lasts about 5h with the
small 4 cell battery). I just use the kernel command options from the
articles mentioned above. And yes, it runs stable :)
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y the article says that they are trying to make a pointfix release for
3.2
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to
fucking finally
http://www.phoronix.com/scan.php?page=news_itempx=MTA1NzA
everything you need to know. afix for 3.2 kernel is on the way
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Title:
Thank you for the information, Julius, but the article says that the fix
will be seen in kernel 3.4 if I'm reading it correctly, no? Hopefully
this fixes the awful battery life on my ThinkPad X220!
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Can the patch be included in Kernel 3.2 ?
I would help testing if it get's backported to precise kernel or a ppa
for testing or something.
The info on the patch is here: http://lists.freedesktop.org/archives
/intel-gfx/2012-February/015075.html
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** Also affects: ubuntu-power-consumption
Importance: Undecided
Status: New
** Changed in: ubuntu-power-consumption
Status: New = Confirmed
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** Changed in: linux (Ubuntu Precise)
Assignee: (unassigned) = Canonical Kernel Team (canonical-kernel-team)
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Title:
[Sandy Bridge] serious
Here is a source confirming that the power regression is fixed for
Kernel 3.3:
http://www.phoronix.com/scan.php?page=news_itempx=MTA0NjE
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Title:
Actually, mediterran81, the link you gave specifically states that this
bug has NOT been fixed, and is an ongoing headache for Intel. This is
just further confirmation that is is not fixed.
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How come? The link says it is fixed in 3.3 (merging of Garrett Patch), while
Ubuntu 12.04 will come with the patch included.
http://www.phoronix.com/scan.php?page=news_itempx=MTA0MTM
http://voices.canonical.com/user/50/tag/power/
Did I mis-read?
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mediterran81, probably you did.
The bug, http://www.phoronix.com/scan.php?page=news_itempx=MTA0MTM says it's
fixed is, I think, the bug #760131
It is different from what we have in this bug ticket. The bug in this ticket is
specific to Intel Sandy Bridge.
Please check out the comments 212 and
Based on the comments 32, 33 and 34, I don't think it's fixed. Brad in
the comment 32 says it's better than before, yet he also says it still
half that of Windows 7 on the same machine.
Why do I see Fix Released? Has anyone actually tested it properly
before changing the issue status?
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mediterran81, the bug that Phoronix is saying is fixed is the ASPM power
bug. It is entirely different than the bug that this report is about.
This bug report refers to the Sandy Bridge-only bug relating to graphics
drivers and RC6. This bug is not fixed. The ASPM power bug is fixed. On
Sandy
I am sorry. Thanks Kevin and Steven.
I indeed confused the two bugs which I am subscribed to.
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Title:
[Sandy Bridge] serious power regression
OK, the kernel bug tracker says it was fixed but it looks like it was closed
about a half year ago. I'm not sure why we Ubuntu users do still not have it.
Andrea Corbellini, could you please let us know exactly which kernel we need to
use in order to test if it's really fixed?
If the bug was
mediterran81, yeah I understand. I subscribed to the both bug tickets
and once I was confused too. :)
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Title:
[Sandy Bridge] serious power
Hmm, as Steven mentioned, this article
http://www.phoronix.com/scan.php?page=news_itempx=MTA0NjE says
- Intel RC6 by default still hasn't been figured out fully by Intel for the
logic when it can be successfully enabled without causing issues. This is for
Intel Sandy Bridge hardware, but at
Can someone with the authority to do so change the status of this bug to
Confirmed from Fix released? Pretty sure it is not fixed.
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Title:
[Sandy
@Steven: thank you for your interest in Ubuntu. The bug has been fixed
upstream (i.e. in the kernel itself), it is not marked as fixed in
Ubuntu. The status of this bug in Ubuntu is 'Triaged', which means that
the bug is reproducible and contains enough information. So the bug is
still open and
Agreed, I didn't notice any change either, we need more reports of
testings
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6
I tested kernel 3.2.1 and saw no improvement in power consumption, even
with i915_enable_fbc and i915_enable_rc6 set.
There are two commits tagged against the upstream bug (#38332). One
makes a change and the other reverts it.
I don't think this bug is fixed.
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I mentioned 3.2 because it was tested in a recent thinkpad suffering the
same disease. Battery life recovered about one hour and CPU temp
dropped to 54 °C.
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I have tested kernel 3.2.1 (from here: http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2.1-precise/ ) on my ThinkPad X220, and it seems to use
a tad MORE power than kernel 3.0. I take it that you were just guessing
at random, mediterran81 (post #30)? Anyone have any actual info about
this?
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** Changed in: linux
Status: Unknown = Fix Released
** Changed in: linux
Importance: Unknown = Medium
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Title:
[Sandy Bridge] serious
I see that the status in Linux is now Fix released. Any details on
this? Links? Information? Which version of the kernel so we can try it?
Thanks!
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3.2
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7
(rc6 disabled)
To manage notifications about this bug go
So is this information out-of-date?
http://www.phoronix.com/scan.php?page=news_itempx=MTAzNDg According
to that article, rc6 was not enabled by default in 3.2 because of the
graphical glitches/freezes some users experienced. So what happened? Did
they fix rc6 so it doesn't cause those problems
I am on Kernel 3.2 in 11.10... using the 12.04 Kernel Package.
My grub config is set to:
GRUB_CMDLINE_LINUX_DEFAULT=quiet splash pcie_aspm=force i915.i915_enable_rc6=1
This has restored a lot of battery life and dramatically dropped the
temp the cpu is running at. But it still half that of
Could anyone please tell me if there is any fresh news regarding this
issue?
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6
Same here on my Thinkpad T420. i915.i915_enable_rc6=1 causes occasional
freezes, but no video corruption.
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Title:
[Sandy Bridge] serious power
@Steven Keys Actually, they are not really related! Intel is working on
this regression which is supposed to be resolved in Kernel 3.2. I do not
remember the link where i read this.
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@mediterran81 Maybe you're referring to this.
https://lkml.org/lkml/2011/11/10/467
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Title:
[Sandy Bridge] serious power regression from kernel
@Rocko indeed.
I have enabled the Bumblebee experimental power management and now battery life
is 3h15 instead of 2h00, and the fan is at comfort now while it has been
soothing like hell.
reference: https://github.com/Bumblebee-Project/Bumblebee/wiki/ACPI-
Removed
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So comments 20-23 are entirely unrelated to this particular bug, right?
It has nothing to do with Sandy Bridge graphics drivers?
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Title:
[Sandy
Same problem on a Dell XPS 15
- Intel i7 2670QM.
- huge power loss (4 hours in windows 7 and 1h55 in Ubuntu 11.10).
- Linux L502X 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011
x86_64 x86_64 x86_64 GNU/Linux
I just got aware of that, during today's conference when I wanted to
write
@Hanine: do you have ironhide (https://launchpad.net/~mj-
casalogic/+archive/ironhide/) or at least acpi-call installed? If not,
the nvidia card on the XPS 15 will be on permanently and it draws a heck
of lot of power even though it is doing nothing.
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I had doubts about it. Yes! I have Bumblebee installed. No doubt Nvidia would
consume all the power.
I am going to switch it off and compare. Thanks Rocko for the guidance! I
totally forgot that.
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@Steven Keys
I'm experiencing video corruption and glitches as well with RC6 enabled. I
experience high power consumption with the default Ubuntu 11.10 kernel setting.
My machine is a Dell Inspiron 15r N5110 - i3-2310M + HD3000
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Hi All,
I just want to post some status information regarding this issue. I've
been in contact with Intel and they are aware of this power regression
issue being experienced on Sandy Bridge hardware. They are actively
investigating a fix(es). They have confirmed that the root cause is the
Monday Thorsten Leemhuis wrote a comment on this bug and added a
suggestion on how distributions might go around to solve it. I like his
proposal. Read it at http://www.h-online.com/open/features/Kernel-
Comment-Untapped-power-saving-potential-1361906.html
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** Tags added: kernel-key
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Title:
[Sandy Bridge] serious power regression from kernel 3.0.0-6 to 3.0.0-7
(rc6 disabled)
To manage
Good to hear that Intel is working on this; thanks for the update. I
would like to point out, however, that this power problem has two
separate symptoms that add up to give the huge power loss. The first is
disabling rc6 (on Sandy Bridge) in kernels 3.x. The second has to do
with sparse irq in the
** Also affects: linux (Ubuntu Oneiric)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Precise)
Importance: Medium
Status: Triaged
** Changed in: linux (Ubuntu Oneiric)
Status: New = Triaged
** Changed in: linux (Ubuntu Oneiric)
Importance:
same problem here on the x220i (oneiric 32bit). the combination of both
settings work for me too, battery usage went down from 15 to 8 watt!
On Oct 16, 2011 1:30 AM, hanfkeks 818...@bugs.launchpad.net wrote:
same problem here,
pcie_aspm=force acpi=noirq
or
i915.i915_enable_rc6=1
by itself
same problem here,
pcie_aspm=force acpi=noirq
or
i915.i915_enable_rc6=1
by itself didn t do any good, but in combination it helped me on a
oneiric amd64 on my Thinkpad X220i with an i3.
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I just installed a fresh copy oneiric amd64 on my Thinkpad X220
i5-2520M. Without the extra kernel parameter my power consumption is
about 16W, w/ the parameter it is about 8W in idle state.
I do not saw the graphic errors after some hours of working and a
suspend/resume cycle. Due to an older
Just passing along what I've experienced with this bug. I also posted this on
the
duplicate bug (#834037) in case one of them is marked as a duplicate.
X220 i7-2620M
I experience the difference in power usage w/ 3.x kernels and setting the
i915.i915_enable_rc6=1 parameter fixes this issue while
Eric, if you could please put your information at the following link,
it would be appreciated. You seem to be experiencing this bug:
https://bugs.launchpad.net/ubuntu/+bug/834037
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I made a mistake previously and would like to clear it up. The mistake
was a result of not giving something enough time and testing. I have now
tested it more thoroughly and have more to report:
Using a modified (no sparse irq) kernel with kernel parameter
i915.i915_enable_rc6=1 DOES increase
I'm seeing the same behavior with a i5-2410M (also on a Thinkpad X220).
With i915.i915_enable_rc6=1, power usage is ~12W, but textures seem to
get corrupted over time.
Without rc6, power usage on idle is ~20W, but graphics are fine.
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or maybe it is specific hw configurations that the rc6 fix works with. i
think that more testing is needed on several other machines with sandy
bridge cpus.
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