Since upgrading to kernel 3.2.5, I have not experienced the problem at
all, but it is an inconsistent/random problem, so I cannot be 100% sure
that it's gone yet.
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It seems that on my ThinkPad X220 with the Centrino Wireless N-1000 and
kernel 3.2.5, WiFi gets worse over time. Sometimes rebooting my machine
speeds it back up until it crawls to a hlat over time again.
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I am trying to apply Mirek's trick in post # 164, but I'm curious if
iwlagn is the same thing as iwlwifi? My wifi driver is listed as
iwlwifi. Should I modify the .conf file somehow?
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This also happens when I switch my screen off manually via xflock4,
without letting it dim beforehand. It resumes to dim if I wait more than
120 seconds.
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My adapter is the Intel Centrino Wireless N-1000 in a ThinkPad X220. I
filed a separate report, and someone marked it as a duplicate of this
one. My report is here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/939218
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*** This bug is a duplicate of bug 836250 ***
https://bugs.launchpad.net/bugs/836250
The following workaround has solved my issue on my ThinkPad X220 with
Intel Centrino Wireless-N 1000 card using iwlwifi driver (except, of
course, that I don't have N wireless capabilities now):
1) Create a f
The following workaround has solved my issue on my ThinkPad X220 with
Intel Centrino Wireless-N 1000 card using iwlwifi driver (except, of
course, that I don't have N wireless capabilities now):
1) Create a file at /etc/modprobe.d/intel_11n_disable.conf containing this one
line:
options iwlwifi 1
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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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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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 rep
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
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 not
@ Comment # 156: It's very strange you say that. With my Intel Centrino
Wireless N-1000 card in my ThinkPad X220, I only see this problem on
UNencrypted networks, and never on encrypted ones (though I have only
tried a few encrypted networks).
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*** This bug is a duplicate of bug 836250 ***
https://bugs.launchpad.net/bugs/836250
Follow-up on my own comment, #16: It seems that the problem is improved,
but not actually fixed as I had said before. There is a definite
improvement though. There are still plenty of networks on which I
exper
Follow-up on my own comment, #171: It seems that the problem is
improved, but not actually fixed as I had said before. There is a
definite improvement though. There are still plenty of networks on which
I experience problems and slowness. Rebooting my machine brings back
higher speeds for a while,
Also, can someone link to an amazon.com product page or some place to
buy the USB networking adapter that works perfectly? I can't find it
based on the information provided so far.
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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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@ #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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I experienced this error during a software update soon after upgrading
to Xubuntu 14.04 LTS from a previous version (not sure which one).
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Title:
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 Br
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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I have returned the battery and cannot provide any further information.
Sorry :-/
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Title:
Secondary laptop battery causing power management proble
I am seeing this exact same bug. I'm running Xubuntu 11.10 64-bit and
Xubuntu 11.04 64-bit. Both show the bug. The "Network disconnected"
notification just doesn't obey the "disappear" setting.
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Public bug reported:
I am seeing this bug in both Xubuntu 11.04 and 11.10 64-bit. When you
open a new tab in xfce4-terminal, it expands the window by that tab's
height vertically. This causes a problem most seriously when the
Terminal window is maximized, because opening a new tab then causes the
I see that the "assignee" has been changed to "nobody," and the activity
on this bug has died down. Is there no hope of this ever getting fixed?
My wifi is unacceptably bad on a majority of routers, especially (but
not only) public hotspots. Would it help if I put a $20 bounty on the
implemented so
Is there anything happening with this bug? I've been suffering with
insanely slow WiFi speeds on my ThinkPad X220 for many months now, and I
feel as though no progress is being made here. I don't have the skills
to fix the bug, but I'm here for testing. To be honest, I'd even pay
money to see this
Chris, your experience does not sound like this bug at all.
Additionally, Ubuntu does not use xfce4-power-manager by default. You
should file a different bug.
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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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So is this information out-of-date?
http://www.phoronix.com/scan.php?page=news_item&px=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
Public bug reported:
When I suspend either of my two ThinkPad X220's under Xubuntu, they fail
to properly wake up about 1 in 15-25 times. What happens is very strange
though, and I believe that it sheds light on the problem, which I need
some help deciphering:
When I open the lid after suspend an
** Attachment added: "lspci-vnvn.log"
https://bugs.launchpad.net/bugs/915730/+attachment/2671180/+files/lspci-vnvn.log
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Title:
Resume From Sus
There is an Ubuntuforums thread on this here:
http://ubuntuforums.org/showthread.php?t=1901920
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Title:
Resume From Suspend on ThinkPad X220 Spotty
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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apport information
** Tags added: apport-collected oneiric staging
** Description changed:
When I suspend either of my two ThinkPad X220's under Xubuntu, they fail
to properly wake up about 1 in 15-25 times. What happens is very strange
though, and I believe that it sheds light on the prob
apport information
** Attachment added: "AlsaDevices.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675208/+files/AlsaDevices.txt
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Ti
apport information
** Attachment added: "AplayDevices.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675209/+files/AplayDevices.txt
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apport information
** Attachment added: "AudioDevicesInUse.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675210/+files/AudioDevicesInUse.txt
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apport information
** Attachment added: "BootDmesg.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675211/+files/BootDmesg.txt
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Title:
apport information
** Attachment added: "Card0.Amixer.values.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675212/+files/Card0.Amixer.values.txt
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apport information
** Attachment added: "Card0.Codecs.codec.0.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675213/+files/Card0.Codecs.codec.0.txt
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apport information
** Attachment added: "PulseSources.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675224/+files/PulseSources.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675227/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Done! Please let me know if you need any more information.
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Title:
Resume From Suspend on ThinkPad X220 Spotty
To manage notifications about this
apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675218/+files/Lsusb.txt
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Title:
Resume
apport information
** Attachment added: "UdevLog.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675226/+files/UdevLog.txt
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Title:
Re
apport information
** Attachment added: "Card0.Codecs.codec.3.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675214/+files/Card0.Codecs.codec.3.txt
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apport information
** Attachment added: "PciMultimedia.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675219/+files/PciMultimedia.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675222/+files/ProcModules.txt
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Ti
apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675220/+files/ProcCpuinfo.txt
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Ti
apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675221/+files/ProcInterrupts.txt
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apport information
** Attachment added: "PulseSinks.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675223/+files/PulseSinks.txt
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Titl
apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675215/+files/CurrentDmesg.txt
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apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675217/+files/Lspci.txt
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Title:
Resume
apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675216/+files/IwConfig.txt
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Title:
apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/915730/+attachment/2675225/+files/UdevDb.txt
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Title:
Resu
This is still happening to me under Xubuntu 11.10! Sometimes Thunar
takes a VERY long time to load after a reboot, and when this happens, it
opens twice!
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BIG NEWS: This bug was affecting me (it started all of a sudden one day
after months of perfect use with the same mouse). After research on
forums, etc., I found TWO people who had reported to solve the problem:
One replaced his mouse with a new mouse. The other (post #12 here:
http://ubuntuforums.
Oh, and just for good measure, in case it's important...I (post #55) am
on Ubuntu 10.10 64-bit. My problem mouse was a Dell, and my solution
mouse is a Logitech.
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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:
[Sa
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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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 Bridg
I am having similar issues on Xubuntu 12.10. Everything worked perfectly
on earlier versions of Xubuntu. Now, no matter what I do, xscreensaver
will not allow the monitor to power off. In fact, if I run
"xflock4;;xset dpms force off" the monitor powers off, and gets woken
back up5-10 seconds later!
I am experiencing this same thing, but without an apparent workaround.
After upgrading from kernel 2.6.38 to 3.0.0-0300, I saw a DRAMATIC
increase in power usage on my Sandy Bridge laptop. I then upgraded to
3.1 and saw no improvement. Trying kernel parameter
i915.i915_enable_rc6=1 made no differen
Maybe in light of my comment (or maybe if someone else can reproduce
it), we should unmark this thread as "triaged," since the solution
doesn't appear to work on all machines.
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https://bug
Just noticed a typo in my post (Post #3): The two kernel versions I have
experienced the problem on are 3.0.1-030001-generic and
3.0.1-030001-generic...I have NOT tried 3.1.
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Public bug reported:
I am running Xubuntu 64-bit on a Lenovo ThinkPad X220, and my WiFi is
very slow and disconnects randomly on some WiFi networks. It also
refuses to even connect to some networks. All of these are networks
which have excellent signal strength and which many other people are
succ
You will notice (from apport data) that the kernel I am using is not the
stock kernel, but this problem existed in exactly the same way when I
was using the stock Xubuntu 11.10 64-bit kernel.
** Tags added: apport-collected oneiric
** Description changed:
I am running Xubuntu 64-bit on a Lenov
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 graphical
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: LibreOf
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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I will try it for a few days and report back. Where does the number 6200
come from? Also, that file did not exist; I had to create it.
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Title:
Int
Actually, after having tested it for just a little while, it's very
obvious to me that it has no effect. I'm still having the issue.
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Title:
Intel
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 + R-E
On the first command, I get "ERROR: Module iwlagn does not exist in
/proc/modules." Perhaps that's because my kernel driver is iwlwifi, not
iwlagn? I don't know a whole lot about this. Thanks for the help.
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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
You mistyped the first line again, but I corrected it. I will try this
for a while and report back. Thanks.
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Title:
Intel Centrino Wireless N-1000
Unfortunately, your suggestion has no effect. My connection is still
slow and very bad on public WiFi. Any other suggestions or things I can
test to help solve the issue?
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Public bug reported:
On my ThinkPad X220 with a Sandy Bridge i7 processor and Xubuntu 11.10 64-bit,
LibreOffice always crashes when scrolling vertically on the attached file's
charts (third sheet). I suspect that this is actually an issue with the kernel
and Sandy Bridge graphics and NOT a prob
** Attachment added: "Spreadsheet which causes hang upon vertical scrolling"
https://bugs.launchpad.net/bugs/940771/+attachment/2781211/+files/Lab%202.ods
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This bug was originally discovered when trying fixes for another bug
(more discussion about it there):
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/940771
** Tags added: apport-collected oneiric
** Description changed:
- On my ThinkPad X220 with a Sandy Bridge i7 processor and Xubuntu 11
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
** Description changed:
I am running Xubuntu 11.10 64-bit on a Lenovo ThinkPad X220, and my WiFi
- is very slow and disconnects randomly on some WiFi networks. It also
- refuses to even connect to some networks. All of these are networks
- which have excellent signal strength and which many othe
It's been apport-collected. Changing to confirmed.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
Scrolling in Libr
Thanks for inquiring. In response to your questions:
1) I see the exact same thing as you: Mouse moves, but no response to
anything (except what I'm about to mention in answer 2...
2) I am NOT able to switch to a virtual terminal using Alt + Ctrl +
F1/2/3/4/5/etc. The only thing I can do is reboo
Is this a Sandy Bridge processor? If so, this may be related to RC6
being turned on by default recently in the Ubuntu 12.04 kernel update.
This issue has been discussed a lot here over time:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/818830
To test whether it is RC6-related, first determ
Just to clarify: If your bug disappears when you pass that kernel
parameter (and you haven't updated your kernel since you filed this
bug), it means that RC6 is the culprit. If the bug persists, it means
RC6 is not the culprit. Please report which is the case, both here and
at the wiki.
If your pr
It may not be a problem with i915, but I'm pretty sure it's a kernel
issue, since when I revert to kernel 3.0, the problem disappears.
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Title:
Scr
Public bug reported:
I am running Xubuntu 11.10 64-bit. I have xfce4-power-manager set to dim
my screen to 20% after 120 seconds of inactivity, and I have
xscreensaver set to switch my display off after 10 minutes. This works
fine, but I have noticed that sometimes (and I cannot find any pattern
t
*** This bug is a security vulnerability ***
Public security bug reported:
I have installed Xubuntu 11.10 from the "alternate" installer disc and
set up whole-disk encryption through the official installer. I am almost
100% certain that when I suspend my machine, my disk's encryption key is
left
This is a solvable security issue, not something that users ought to
just deal with. The solution is to dump the key from RAM on suspend and
to NOT write it to disk on Hibernate, and to ask the user to unlock the
disk on resume. Disk encryption is useless on machines that get
suspended or hibernate
I tested the kernel you linked to. The issue still exists. My WiFi on an
unencrypted network is intermittently very slow.
** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream
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I have tested the current upstream kernel from here:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.3-rc5-precise/
(3.3-rc5), and this issue is not reproducible on the same machine with
the same file. For now, it appears that the issue does not exist for
that kernel.
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On second thought, I should be a better scientist and give it more
testing. I barely tested it before, and it seems to be working better
than usual now, but maybe it's my imagination. I'll report back in a day
or two with definitive results after testing it at a few hotspots.
** Tags removed: kern
I am now 100% confident that this bug still exists in the upstream
kernel. What comes next? Thanks!
** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream
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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? P
This is a solvable security issue, not something that users ought to
just deal with. The solution is to dump the key from RAM on suspend and
to NOT write it to disk on Hibernate, and to ask the user to unlock the
disk on resume. Disk encryption is useless on machines that get
suspended or hibernate
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 bi
I'm on a ThinkPad X220 running Xubuntu 11.10 64-bit and can confirm that
the mic mute button does not respond, and the LED does not light up
either. Have not tried any of the fixes.
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Maybe the importance of this should be medium rather than low? It is one
of the first things Xubuntu users notice with a fresh installation, and
although it is just an annoyance, it is one that every user, new or old,
beginner or advanced, has to deal with.
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