*** This bug is a duplicate of bug 818830 ***
https://bugs.launchpad.net/bugs/818830
** Also affects: linux
Importance: Undecided
Status: New
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*** This bug is a duplicate of bug 818830 ***
https://bugs.launchpad.net/bugs/818830
Hi Steven,
I do believe this is a duplicate of bug 818830 so I am marking it as
such. I've been in contact with Intel and they are aware of the power
regression issue and are actively investigating a fix. T
I am also experiencing this same issue on a Lenovo X220 i7 2620m.
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https://bugs.launchpad.net/bugs/834037
Title:
Huge power regression in kernel 3.x on Sandy Bridge laptops
To manage n
I had this problem after I updated first kernel after 2.6.38. So I
always kept a copy of 2.6.38. All the 3.0 and even 3.0.1(custom
compiled) had this problem. 2.6.38 has graphics glitches, but xorg-
edgers has made it usable enough. The 3.0 kernels are good for graphics
performance but drains away
Looks like Phoronix has pretty much confirmed this same bug on Sandy
Bridge processors:
http://www.phoronix.com/scan.php?page=news_item&px=OTg5Mg
Their power usage increase between the two kernels matches what I see
very closely.
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Just passing along what I've experienced with this bug. I also posted this on
the duplicate bug (#818830) 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
Also seeing this on the new MacBook Air 13.3" Core i5-2557M.
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Title:
Huge power regression in kernel 3.x on Sandy Bridge laptops
To manage notifi
** Description changed:
I would like to report what myself and several others believe to be a
serious bug affecting all Linux kernels 3.0 and up, and none below 3.0
(2.6.x and lower). I tested this using .deb kernel packages for Ubuntu 11.10.
One-sentence description: On certain hardwar
Added package as "linux"
** Package changed: ubuntu => linux (Ubuntu)
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Title:
Huge power regression in kernel 3.x on Sandy Bridge laptops
To man
This appears to be a potentially related, but apparently different bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/818830
The person who posted comment #10 (Eric Liang) on that bug seems to
actually be experiencing this bug. He is also using an X220 with a Sandy
Bridge processor.
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Yo
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 the modified (no sparse irq) kernel with kernel parameter
i915.i915_enable_rc6=1 DOES increase ba
Forgot to add that my command line arguments have been set by grub to
include "acpi_osi=Linux i8042.reset=1" for all of the above kernel
installs to ensure hardware fn-keys work as intended. Will test with
other command line options recommended in this article to see if they
have any effect:
http:/
Same issue here on Acer 3820t with Core i3-350m. Kernel rescheduling
ticks account for 400-1000 wakeups per second at idle under Bodhi Linux
1.1 (Ubuntu Lucid base) with 3.0.0.7 and 3.0.0.8. Worst I had ever seen
previously was around 300-400 per second under 2.6.34.x I think it was.
2.6.38.x usual
** Changed in: ubuntu
Status: New => Confirmed
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Title:
Huge power regression in kernel 3.x on Sandy Bridge laptops
To manage notifications
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