Bug#639618: linux-image-2.6.32-5-686: events/0 using 33-66% cpu ("system"), missing keystrokes before or after gdm loads
Package: linux-2.6
Version: 2.6.32-35
Severity: important
Starting in the last day or so, events/0 has been using 33-66% cpu
as "system" activity. The keyboard is missing keystrokes if I type
too many at one time and don't pause every few seconds for it to
catch up. This happens even before I log into gdm, if I go to a
console with ctl-alt-F1 and log in as root after reboot, events is
already eating cpu and keystrokes are lost. What's going on?
There was also a regression in squeeze recently with gnome-panel
with a bug where gnome panel fails to start or starts offscreen,
probably not related but thought I would mention it since this
but is so severe.
Thank you.
-Mark
-- Package-specific info:
** Version:
Linux version 2.6.32-5-686 (Debian 2.6.32-35) (dannf@debian.org) (gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Mon Jun 13 04:13:06 UTC 2011
*** Protocol statistics:
Ip:
45540 total packets received
0 forwarded
0 incoming packets discarded
45333 incoming packets delivered
45081 requests sent out
64 outgoing packets dropped
Icmp:
64 ICMP messages received
0 input ICMP message failed.
ICMP input histogram:
destination unreachable: 64
64 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 64
IcmpMsg:
InType3: 64
OutType3: 64
Tcp:
67 active connections openings
28 passive connection openings
8 failed connection attempts
18 connection resets received
5 connections established
45322 segments received
45074 segments send out
6 segments retransmited
0 bad segments received.
38 resets sent
Udp:
145 packets received
64 packets to unknown port received.
0 packet receive errors
197 packets sent
UdpLite:
TcpExt:
24 TCP sockets finished time wait in fast timer
119 delayed acks sent
1 delayed acks further delayed because of locked socket
Quick ack mode was activated 4 times
14686 packets directly queued to recvmsg prequeue.
2449 bytes directly in process context from backlog
824974 bytes directly received in process context from prequeue
8401 packet headers predicted
14485 packets header predicted and directly queued to user
219 acknowledgments not containing data payload received
22085 predicted acknowledgments
5 congestion windows recovered without slow start after partial ack
6 other TCP timeouts
4 DSACKs sent for old packets
6 DSACKs received
14 connections reset due to unexpected data
6 connections reset due to early user close
TCPDSACKIgnoredNoUndo: 2
IpExt:
InNoRoutes: 1
InMcastPkts: 41
OutMcastPkts: 18
InBcastPkts: 64
InOctets: 7184536
OutOctets: 6026686
InMcastOctets: 10058
OutMcastOctets: 2973
InBcastOctets: 10158
** USB devices:
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 0483:2016 SGS Thomson Microelectronics Fingerprint Reader
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Kernel: Linux 2.6.32-5-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages linux-image-2.6.32-5-686 depends on:
ii debconf [debconf-2.0] 1.5.36.1 Debian configuration management sy
ii initramfs-tools [linux-initra 0.98.8 tools for generating an initramfs
ii linux-base 2.6.32-35 Linux image base package
ii module-init-tools 3.12-1 tools for managing Linux kernel mo
Versions of packages linux-image-2.6.32-5-686 recommends:
ii firmware-linux-free 2.6.32-35 Binary firmware for various driver
ii libc6-i686 2.11.2-10 Embedded GNU C Library: Shared lib
Versions of packages linux-image-2.6.32-5-686 suggests:
ii grub 0.97-64 GRand Unified Bootloader (dummy pa
pn linux-doc-2.6.32 <none> (no description available)
Versions of packages linux-image-2.6.32-5-686 is related to:
pn firmware-bnx2 <none> (no description available)
pn firmware-bnx2x <none> (no description available)
pn firmware-ipw2x00 <none> (no description available)
pn firmware-ivtv <none> (no description available)
ii firmware-iwlwifi 0.28 Binary firmware for Intel Wireless
pn firmware-linux <none> (no description available)
pn firmware-linux-nonfree <none> (no description available)
pn firmware-qlogic <none> (no description available)
pn firmware-ralink <none> (no description available)
pn xen-hypervisor <none> (no description available)
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08-28-2011, 06:06 PM
Ben Hutchings
Bug#639618: linux-image-2.6.32-5-686: events/0 using 33-66% cpu ("system"), missing keystrokes before or after gdm loads
On Sun, 2011-08-28 at 10:14 -0700, Mark Hedges wrote:
> Package: linux-2.6
> Version: 2.6.32-35
> Severity: important
>
>
> Starting in the last day or so, events/0 has been using 33-66% cpu
> as "system" activity.
Did you upgrade the kernel in the last day or so? If not, do you have
any idea what might have changed?
> The keyboard is missing keystrokes if I type
> too many at one time and don't pause every few seconds for it to
> catch up. This happens even before I log into gdm, if I go to a
> console with ctl-alt-F1 and log in as root after reboot, events is
> already eating cpu and keystrokes are lost. What's going on?
[...]
Do these warnings mean anything to you?
[ 57.141392] thinkpad_acpi: setting the hotkey mask to 0x00ffffff is likely not the best way to go about it
[ 57.141400] thinkpad_acpi: please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation
Ben.
08-29-2011, 04:36 AM
Mark Hedges
Bug#639618: linux-image-2.6.32-5-686: events/0 using 33-66% cpu ("system"), missing keystrokes before or after gdm loads
> > The keyboard is missing keystrokes if I type
> > too many at one time and don't pause every few seconds for it to
> > catch up. This happens even before I log into gdm, if I go to a
> > console with ctl-alt-F1 and log in as root after reboot, events is
> > already eating cpu and keystrokes are lost. What's going on?
On Sun, 28 Aug 2011, Ben Hutchings wrote:
> Did you upgrade the kernel in the last day or so? If not,
> do you have any idea what might have changed?
I tried rebooting earlier and that didn't help. But I shut
down for a while and now it is fine. I did replace my CPU
fan recently, and my replacement battery melted down
(literally melted-- yikes). Maybe I damaged a sensor or
something. The other thought was, does TiMidity feed some
events? I don't know why it was running by default.
> Do these warnings mean anything to you?
>
> [ 57.141392] thinkpad_acpi: setting the hotkey mask to
> 0x00ffffff is likely not the best way to go about it [
> 57.141400] thinkpad_acpi: please consider using the driver
> defaults, and refer to up-to-date thinkpad-acpi
> documentation
That's been happening for a while. I think the thinkpad
acpi driver is out of date. I should probably recompile a
custom kernel and use the tp-smapi driver instead. It gives
the autopark shock feature with hdapsd too, which is not
in the stock kernels. I don't know if it's a license issue
or what. I don't think this is related.
We can downgrade the importance of this... maybe it was a
hardware glitch or a fluke.
Mark
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08-29-2011, 11:08 AM
Ben Hutchings
Bug#639618: linux-image-2.6.32-5-686: events/0 using 33-66% cpu ("system"), missing keystrokes before or after gdm loads
On Sun, 2011-08-28 at 21:36 -0700, Mark Hedges wrote:
> > > The keyboard is missing keystrokes if I type
> > > too many at one time and don't pause every few seconds for it to
> > > catch up. This happens even before I log into gdm, if I go to a
> > > console with ctl-alt-F1 and log in as root after reboot, events is
> > > already eating cpu and keystrokes are lost. What's going on?
>
>
> On Sun, 28 Aug 2011, Ben Hutchings wrote:
>
> > Did you upgrade the kernel in the last day or so? If not,
> > do you have any idea what might have changed?
>
> I tried rebooting earlier and that didn't help. But I shut
> down for a while and now it is fine. I did replace my CPU
> fan recently, and my replacement battery melted down
> (literally melted-- yikes). Maybe I damaged a sensor or
> something. The other thought was, does TiMidity feed some
> events? I don't know why it was running by default.
The "events/<number>" tasks are used by device drivers and other kernel
code, but not by userland. Something in the kernel is generating a
constant stream of work for this task to do.
> > Do these warnings mean anything to you?
> >
> > [ 57.141392] thinkpad_acpi: setting the hotkey mask to
> > 0x00ffffff is likely not the best way to go about it [
> > 57.141400] thinkpad_acpi: please consider using the driver
> > defaults, and refer to up-to-date thinkpad-acpi
> > documentation
>
> That's been happening for a while. I think the thinkpad
> acpi driver is out of date.
Well, the whole of Linux 2.6.32 is now out of date. But we want to
maintain a working kernel with minimal changes for the next 2 years or
so!
> I should probably recompile a
> custom kernel and use the tp-smapi driver instead.
I can't recommend that.
> It gives
> the autopark shock feature with hdapsd too, which is not
> in the stock kernels. I don't know if it's a license issue
> or what. I don't think this is related.
>
> We can downgrade the importance of this... maybe it was a
> hardware glitch or a fluke.