Per the last few of comments, it appears this bug is no longer and issue
and will be marked as closed against linux-source-2.6.20. Against
linux-source-2.6.15 and linux-restricted-modules-2.6.15, this bug does
not meet the criteria for a stable release update and will also be
closed. You can
** Tags added: kernel-bug
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I think this bug can be closed now... not seen in any newer kernel
releases.
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John McPherson said on 2007-04-10:
this lockup does not occur for me any more using skype on ubuntu 7.04 betas
that come with kernel 2.6.20.
Thanks for the heads-up. I've re-enabled sound and the problem seems to
have gone away. I'm running Feisty, kernel Linux ferrari
2.6.20-15-generic #2
Me too.
No lockup problem since update to 2.6.20-14, but now I get the decreasing
quality that other people described before. After ~1 hour I can't talk with
other people over voice connection, but chat and file transfers work correctly.
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this lockup does not occur for me any more using skype on ubuntu 7.04
betas that come with kernel 2.6.20.
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Skype does not run with suid. It runs under normal (non-root) user
privileges.
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I suspect Skype is running away (or more likely spin waiting in a tight
loop calling gettimeofday). If a process is SCHED_FIFO 99, then it will
block all other processes from running until it yields. It may be
possible that it could also tickle the soft-lockup detection code. I'm
guessing skype
i can also confirm that turning off the notification sounds 'resolves'
this issue.
I think this bug be looked at as a matter of urgency, it affects most
ubuntu users using skype and is a serious DoS vun.
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But isn't it playing a sound when you actually start talking, too? I
don't remember trying this...
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It only solves the issue when chatting. For voice-calls it's still the
same problem.
So it seems to be pretty sure that this issue is related to audio output
(and maybe also input). But on the other hand the problem occurs with
the ALSA as well as the OSS kernel drivers.
Did anyone try if
If anyone is able to reproduce this problem on 2.6.20 please post a
report to http://bugzilla.kernel.org/ and link to this report.
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Confirmed that is a sound problem!!
Testing the Incoming Chat sound in Sound Preferences the system freeze
happens just like when receving a new chat request.
BTW, no solutions yet, right?
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I have seen this bug happen on an older laptop with a ipw2100 card and
Intel 82801 card. I have seen people ringing the laptop via skype often,
in order to make it lock on purpose. Moreover, it once happened with my
laptop that it could not get out of the hang.
Since this bug is exploited by a
I have the same problem.
Kubuntu edgy 6.10 on a Centrino Duo with ipw3945 wireless. Full
configuration of the hardware is here: a
href=http://baheyeldin.com/click/782/5;Toshiba Satellite A100-TA6 with
Kubuntu/a.
Occasionally, when an incoming call from Skype comes in, (and perhaps
when I am on
Some observations possibly useful for reproducing the bug:
* The bug does not seem to depend on the kind of sound Skype tries to
make. Sometimes, when I feel that the next chat will lock my system for
another five mins, I call Skype test call to trigger the log in a
controlled way.
* The longer
fyi, just tried it out with a mostly-vanilla 2.6.19 kernel (including
suspend2 and tp_smapi patches). still the same problem.
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This has also been reported in the skype forums:
http://forum.skype.com/index.php?showtopic=64990
and I can confirm thad I had no problems after disabling sound, and that
I have a ipw3945 wifi card and the soundcard that's shipping with
centrino duo, I don't remember the name now (using another
Ok, here is some hopefully more useful information, captured with
$ strace -t -p $(pidof skype) 2| skype-write-log.txt
just before doing something that outputs sound in skype after it has
been idle for a while. My system hung for 11 seconds, which is captured
in this strace log (although I
I've been encountering this bug since dapper, I'd assumed it was a bug
in the kernel's networking due to the lots of weird packets skype sends
to try to get around nat, but these comments make it seem likely that
it's audio related.
Is there a way to get copious alsa debugging to see what skype
As far as I know, the 8x0 driver may be used for other chipsets too. I
might be saying BS here, but I seem to remember a Via chipset being
supported by the Intel driver. So maybe the bug is in that particular
driver.
If the owners of AMD-based machines could give us an lsmod of their
system, we
** Changed in: linux-source-2.6.15 (Ubuntu)
Status: Unconfirmed = Confirmed
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I've been running Skype through strace for almost two days now and
although similar conditions to those that triggered the lockup before
have been experienced, the lockup hasn't occurred. The worst I've seen
is choppy audio and a delay in displaying IM messages. I think someone
already suggested
Jerome wrote:
BTW, I just noticed that a newer skype version is available.
http://skype.com/download/skype/linux/changelog.html
Let us know if it stops triggering the bug.
This is the version I've been running and it hasn't solved the problem.
gst wrote:
I disabled audio notification for
The latest version of skype - 1.4.0.53_API - still gives me problems
(incoming chat in this case - lockup for about 15 seconds).
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uhm... that is 1.3.0.53_API of course :)
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I tried to send an e-mail to lkml, but it did not show up... The
problem seems linked to sound _and_ SMP...
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I experience this prob and I don't have an SMP kernel.
Acer 9500
Skype 1.3.0.53
kernel 2.6.15-27-686
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kernel 2.6.15-27-686
That would be an SMP kernel AFAIK. Try 'uname -a' to check. This is
mine:
uname -a
Linux england 2.6.15-26-k7 #1 SMP PREEMPT Fri Sep 8 20:38:34 UTC 2006
i686 GNU/Linux
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Hervé Fache wrote:
kernel 2.6.15-27-686
That would be an SMP kernel AFAIK. Try 'uname -a' to check. This is
mine:
uname -a
Linux england 2.6.15-26-k7 #1 SMP PREEMPT Fri Sep 8 20:38:34 UTC 2006
i686 GNU/Linux
Yes
uname -a
Linux dylan 2.6.15-27-686 #1 SMP PREEMPT Sat Sep 16 02:13:27
To Jerome Lacoste:
Note that there are clone() calls preceeding the sched_setscheduler().
It is possible that a child process is the doing something that causes
the system to hang. However since you didn't run strace with -f
switch (to also trace child processes), you only see trace of the parent
following up on my previous post --
Not there but here:
15:44:47.164609 sched_get_priority_max(SCHED_FIFO) = 99 0.08
15:44:47.164665 sched_setscheduler(21263, SCHED_FIFO, { 99 }) = 0 7.981930
15:44:55.146712 mmap2(NULL, 8392704, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
gst: as you are running a vanilla kernel (or almost), and assuming it
is not tainted, maybe you could report the problem on the lkml?
They will be a pain because Skype is proprietory, but the bug is
clearly a kernel bug, and other applications could potentially trigger
it.
As you said, it's a
On 10/11/06, Hervé Fache [EMAIL PROTECTED] wrote:
gst: as you are running a vanilla kernel (or almost), and assuming it
is not tainted, maybe you could report the problem on the lkml?
They will be a pain because Skype is proprietory, but the bug is
clearly a kernel bug, and other
are you saying that:
15:44:55.147148 sched_setscheduler(21264, SCHED_FIFO, { 2 }) = 0 0.27
is the last thing in the trace before:
15:45:34.548964 select(40, [3 4 5 7 39], [], [], {0, 496177}
?
IOW, is it this particular call (the first one, of course) that locks
the kernel? That would
On 10/11/06, Hervé Fache [EMAIL PROTECTED] wrote:
are you saying that:
15:44:55.147148 sched_setscheduler(21264, SCHED_FIFO, { 2 }) = 0 0.27
is the last thing in the trace before:
15:45:34.548964 select(40, [3 4 5 7 39], [], [], {0, 496177}
?
Not there but here:
15:44:47.164609
FYI, I reported this problem to the LKML.
http://lkml.org/lkml/2006/10/11/200 - if you have relevant informations
please follow up on my post.
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Is your sound system set to run with highest priority? Mine was...
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Same problem here with Edgy and latest updates. Skype 1.3.0_53, kernel
2.6.17-10-generic
No VMWare, it was never installed on my machine.
For what it's worth, the log shows a firmware error in the wireless card just
before the last hang I experienced. I don't know if it was so for all hangs.
The
I disabled audio notification for incoming chats and it never hangs on
chats - only on calls. So it seems that the reason for the lockups may
be related to audio output.
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On 10/12/06, gst [EMAIL PROTECTED] wrote:
I disabled audio notification for incoming chats and it never hangs on
chats - only on calls. So it seems that the reason for the lockups may
be related to audio output.
I can confirm that the system calls preceeding (i.e. in the same second) the
Still the same problem with the current version:
[4323557.284000] BUG: soft lockup detected on CPU#0!
[4323557.284000] c01562cd softlockup_tick+0xad/0xf0 c012e609
update_process_times+0x39/0x90
[4323557.284000] c011600b smp_apic_timer_interrupt+0x5b/0x70 c01398d1
sys_clock_gettime+0x31/0xb0
Update to my last posting: The machine where this problem occurs is a
X41 Thinkpad. CPU is Pentium M Dothan - full spec available on
http://www.thinkwiki.org/wiki/Category:X41
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Similar, but not identical problem here. It seems to happen mainly when
Skype has been idle for some time, when someone sends me a chat message
everything hangs for up to five minutes.
Software:
Ubuntu Dapper running:
Kernel 2.6.15-27-amd64-k8
Skype 1.3.0.53_API installed in a 32-bit
On 10/9/06, James Tait [EMAIL PROTECTED] wrote:
Similar, but not identical problem here. It seems to happen mainly when
Skype has been idle for some time, when someone sends me a chat message
everything hangs for up to five minutes.
I have the same behavior (i.e. it needs to be idle) except
On 10/9/06, jerome lacoste [EMAIL PROTECTED] wrote:
On 10/9/06, James Tait [EMAIL PROTECTED] wrote:
Similar, but not identical problem here. It seems to happen mainly when
Skype has been idle for some time, when someone sends me a chat message
everything hangs for up to five minutes.
I
It happened for the first time in Edgy today: 1 minute of delay
extract of /var/log/messages (this time it's not in kern.log?):
Oct 5 09:34:36 cbers11 kernel: [17354093.868000] c01491df
softlockup_tick+0x9f/0xf0 c012bee1 update_process_times+0x31/0x80
Oct 5 09:34:36 cbers11 kernel:
I've been suffering from these hangups for a while now, only with the
recent skype and recent kernels. System specs:
Dell Inspiron 300m
Ubuntu Dapper up-to-date w/ kernel 2.6.15-27-686 (SMP, PREEMPT)
Skype 1.3.0.47_API
List of loaded modules given below
* No VMware is running (ruling out suspect
Same here: Dapper + Skype v1.30 (beta), the one with ALSA support.
The machine is a Dell Dimension 1100.
Almost every time someone contacts me (chat), the machine hangs for 2 minutes,
or sometimes for ever. Still answers a ping though!
I reported the problem to Skype themselves, but it's
On 9/18/06, Hervé Fache [EMAIL PROTECTED] wrote:
Same here: Dapper + Skype v1.30 (beta), the one with ALSA support.
The machine is a Dell Dimension 1100.
I also have a Dell. Optiplex GX270
Almost every time someone contacts me (chat), the machine hangs for 2
minutes, or sometimes for ever.
On 9/18/06, Jerome Lacoste [EMAIL PROTECTED] wrote:
I also have a Dell. Optiplex GX270
Hmmm!
The problem is: the kernel says it's tainted (VMWare modules),
so not much hope from LKML.
mmm. I don't need VMWARE, so I can remove them before reproducing the
issue. Have you tried ?
Nop, but
In the mean time, I've stopped using skype.
I can't: company requirement!
Company relies on skype !
Ouch scary...
Seems we have a number of common factors here: Dell + VMWare
Have you got a reliable way of triggering the problem? It seems erratic
here...
It happens 99% of the time
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