This bug is not fixed oneiric. I am running Xubuntu 11.10 and still
experiencing these random freezes on my T420. Subjectively seems like
certain graphics-heavy applications/plugins make it happen more often.
Also subjectively seems like some of the kernel options and phoronix
drivers make it
** Changed in: linux (Ubuntu)
Status: Confirmed = Fix Released
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Title:
Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
According to the reports above, the original bug has been fixed in 11.10
Oneiric. The hardlocking bug on 11.10 with Chrome/Chromium sync is
likely to be a different bug and would be easier to fix if someone filed
a new bug report, thus automatically capturing all the relevant hardware
info and
Yes, I'm on Xubuntu 11.10 and it's been happening as well. When it hard
freezes, the cap locks light doesn't even respond.
Also I can't HALT.
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Ah, thanks for the info. That's consistent with the bug that syncing
causes the freezes.
I haven't had a freeze since switching to Firefox. Thanks everyone for
your help and suggestions.
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Got another hardlock even with Chromium. Switching to Firefox, will
report if it freezes.
If someone else could comment if they've seen these with Ubuntu 11.10,
Chrome/Chromium that would be great.
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I am using Ubuntu 11.10 with Chromium and Firefox since October and I
don't remember (read: 99% there weren't any) any hardlocks since then.
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Did you have sync setup on Chromium? The link I posted above says it
only happens when it syncs in the background. Also, how much do you use
Firefox vs. Chromium? Obviously if you don't have Chromium open much it
probably wouldn't happen.
Thanks for the info,
Charles
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Well, Chromium and Firefox are running almost contiunously on my machine
(am using the two for different purposes), however I don't use sync with
Chromium.
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This is quite surprising to me, but I switched to Chromium from Chrome and I
haven't seen a hardlock since my last post. This comment on Google's help
section confirms this as a possibility:
http://www.google.com/support/forum/p/Chrome/thread?tid=7493a9fc196ea8behl=en
This thread also reports
Interesting! I actually switched to Chromium about four months ago in
32bit 11.04. A Chrome release caused Chrome to start blocking for some
20s on each link/bookmark I navigated. I checked some forums and tried
Chromium that worked fine. Some Chrome releases later I tried Chrome
again but the
I've run chromium from day 1 and it still hard locked on 11.04. I have
not had a single hard lock on 11.10.
H/W path Device Class Description
system 41785PA ()
/0
Garry: so maybe Chromium + 11.04 = hardlocks, but Chromium + 11.10 = no
hardlocks.
If I get a hardlock with Chromium I'll report it here and switch to
firefox :-)
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I'm too little of a linux hacker to be able to diagnose your problem. But here
is first the short lshw (thank you for hinting about this copact printout).
I also include a lsmod to show which drivers are running.
dag@tp:~$ sudo lshw -short
H/W path Device Class
Dag: I switched to xfce and rox-filer shell / file manager and it
happened again, immediately after resuming from suspend. So we can rule
out Unity as the issue.
I'm not sure how to use lshw, looks like I have to do sudo lshw
some_text_file prior to the crash? Here are the other outputs.
lspci
Dag: Interesting, we both have the Intel Centrino UItimate-N wifi
module. That wasn't the default--I ordered mine through lenovo directly.
I wonder if it's hard-locking when it tries to connect to an AP?
dmesg appears to flush every time I reboot. What's a good way to get
general hardware
OK lshw was just incredibly slow to run, perhaps while my wifi was
connecting. Here's the output with -short:
H/W path Device Class Description
=
system 4177CTO ()
/0
Dag Rende: What shell are you running? Gnome3 or Unity?
If you're not having issues with T420s, maybe it's due to my SSD,
bluetooth, or getting an Intel Wifi module instead of the default
thinkpad one.
Which of the T420s models did you get?
Charles,
I have a 4174-P4G.
I'm running Unity.
Attatch output of lshw, lspci and lsusb.
Regards,
Dag
** Attachment added: lshw.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/792849/+attachment/2613296/+files/lshw.txt
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Here is my lspci:
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family
DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel
To add another example. I also experience hardlocks with my Sandybridge
T420. Keyboard input and mouse input is unresponsive, all applications
stop updating.
This problem happens seemingly randomly, though it appears to happen
more immediately after resuming from suspend. A hardlock ALWAYS occurs
To add to my above comment, I'm running 11.10 and this has NOT fixed the
problem. To those that don't have the problem in 11.10: do you have
Sandy Bridge or another graphics card?
Are you running x64 as I am?
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I have a T420s and its the most stable PC I have ever had. I run Ubuntu 11.10
(see how at http://dagrende.blogspot.com).
However, LibreOffice Impress crashes too often to be usable. But the machine
doesn't lock.
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I've not had a single lock up on my x220 since installing oneiric (I had
strange, likely unrelated, problems after upgrading).
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Title:
Lenovo
I'm back, guess why. After 10 days of Ubuntu 11.10 I just I had an hard
lock exactly in the same fashion of those I had with previous versions.
Perhaps the new kernel simply reduces the frequency of these events, it
doesn't avoid them absolutely.
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Hello everyone,
I can confirm that upgrading to Ubuntu 11.10 effectively solved this
problem on my T420 and in another one of a colleague. Unfortunately the
upgrade also removed some of the software I use the most (Lotus Notes)
meaning that I'm back to Windows :(
Luís
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No issues in 2+ days of use with Oneiric on my T420. Well done.
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Title:
Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
To
Hello everyone. I started a new job last month where I got a ThinkPad
T420 with Ubuntu 10.10 on it. I also experience this sort of assorted
hard locks without any recognizable pattern. Sometimes it can go 3 or 4
days without trouble and suddenly locks 3 or 4 times in a few hours.
We have several
I can confirm that the problem is gone in 11.10 on the T420. I upgraded
early in the Beta phase because it was such an issue for me and have had
no lock ups since.
For what its worth I think its worth the upgrade to 11.10. I find it
much more polished and stable than 11.04.
Cheers
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Thank you Garry. I'll try to have an upgrade.
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Title:
Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
To manage notifications
I see this on my i7 x220. Hard to say if it's the same cause, but it
seems quite likely. No errors in any logs I can see. I can't ssh in to
my machine when this happens, it's more than a GPU hang.
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Same issue with random hard locks. Now running using Ubuntu Classic (No
effects) and have had no lock ups for 3 days.
Will see what 11.10 Beta 1 brings and may upgrade to that to see if the
problem goes away.
T420, 11.04, Kenel 2.6.38-11-generic, Gnome 2.32.1
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Scratch the above. Restarted again to test (in classic no effects). As
Skype was starting after login ... complete hard lock. I'm stumped.
Gotta be a Kernel issue.
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Have been using these past few days Gnome without effects, and it's
running stable - no crash since then. This might be for others another
(temporal) alternative to getting the 3.0 Kernel.
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I am affected by this, too. Do you propose to install the kernel 3.0?
Will this make the system run stable, and if so, with or without Compiz
effects?
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Kernel 3.0 runs a lot more stable but not 100%. When unplugging the machine
from the docking station without turning off the external monitor before it
might still crash. But it's certainly improved. I used the kernel from here:
http://kernel.ubuntu.com/~kernel-ppa/mainline/
Only concern I have
I have this undocking without turning off ext. monitor issue, too (I am using
the 2.6.38-11 stock kernel).
Ok, but apart from that, using the 3.0 kernel solves the random hardlocks? That
would already be a huge improvement. I'll maybe give it a try later.
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The proposed kernel (2.6.38-11) does not resolve this issue.
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Title:
Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
To manage
** Attachment added: Errors in Xorg.0.log.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/792849/+attachment/2282154/+files/Xorg.0.log
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** Attachment added: Errors in dmesg.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/792849/+attachment/2282155/+files/dmesg
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Title:
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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Title:
Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
To
Can you ssh in to the machine from another system when this happens? If
so, can you check if the 2.6.38-11 kernel that is in natty-proposed
fixes this problem? There was a fix for for these symptoms in that
kernel that was also included in 3.0-rc4, but if you can't ssh into the
machine then it is
I should mention I'm asking if that kernel works without using xorg-
edgers, there are very likely other freezes caused by a new acceleration
architecture being used by intel in that PPA.
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I have these lockups on my Lenovo T520 as well. The system locks up
completly but randomly. Nothing improved with the few sandybridge
patches and the update to 2.6.38-10.
The only information I have, that this lockups occur running a compiz
accelerated desktop.
Additionally these problems
How is it going, NTolerance?
Is the T420 stable?
Do you experience much running 3.0 with ubuntu, apart from any hardware
problems?
I hesitate to buy a T420 until I hear at least a few success stories
with ubuntu on it.
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Stability has been flawless with this kernel from the kernel PPA:
3.0.0-999-generic #201106081005 SMP Wed Jun 8 10:09:57 UTC 2011 x86_64
x86_64 x86_64 GNU/Linux
I'm also running a slighly outdated set of packages from the xorg-edgers PPA.
I enabled the PPA to get some necessary stuff, but
This affects me, too. Identical symptoms to what NTolerance reports.
NTolerance is running the next-proposed kernel, it seems. I tried that, too. No
changes. Switched to 39.0 - same problems. Also with and without xorg-intel
drivers from xorg/edgers made no difference. Random crashes, when
Yeah, after I created this bug report I ran into some issues with the
kernel I was running at the time and now I'm running Linux 3.0!
3.0.0-999-generic #201106081005
This build has not locked up on me in at least 4 full days of use. Keep in
mind that I did go several days on the last kernel
** Package changed: ubuntu = linux (Ubuntu)
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Title:
Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
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** Changed in: linux (Ubuntu)
Status: New = Confirmed
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Title:
Lenovo ThinkPad T420 random hardlocks with Sandy Bridge graphics
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Title:
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