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Message #09939
Re: [Bug 998204] Re: Intel chipset driver bug on Ubuntu certified Dell Latitude E5420: connecting power cord makes kworker run amok
I have this laptop and this is still an issue in an up to date
ringtail installation. If anything the bug has got worse the laptop
completely freezes with power adapter in and the old dkms work around
no longer works either.
Sent from my iPad
On 25 Aug 2013, at 01:50, "Christopher M. Penalver"
<christopher.m.penalver@xxxxxxxxx> wrote:
Otto Kekäläinen, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .
If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:
apport-collect -p linux <replace-with-bug-number>
Also, could you please test the latest upstream kernel available
following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow
additional upstream developers to examine the issue. Please do not
test the daily folder, but the one all the way at the bottom. Once
you've tested the upstream kernel, please comment on which kernel
version specifically you tested. If this bug is fixed in the mainline
kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER
where VERSION-NUMBER is the version number of the kernel you tested.
For example:
kernel-fixed-upstream-v3.11-rc5
This can be done by clicking on the yellow circle with a black pencil
icon next to the word Tags located at the bottom of the bug
description. As well, please remove the tag:
needs-upstream-testing
If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER
As well, please remove the tag:
needs-upstream-testing
Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.
** Tags added: bios-outdated-a13 regression-potential
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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report.
https://bugs.launchpad.net/bugs/998204
Title:
Intel chipset driver bug on Ubuntu certified Dell Latitude E5420:
connecting power cord makes kworker run amok
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
I've noticed that sometimes when I'm running on battery and then
insert the power cord, the system slows down significantly. When I
remove the power cord, it runs fine again, and when I reattach the
power cord the system slows down again.
I'm running the latest Ubuntu 12.04 with all updates on a pre-
installed Dell Latitude E5420 that is supposed to work perfectly with
Ubuntu, since it is officially certified.
While the sluggishness happens, running 'top' shows several kworker processes:
top - 21:29:24 up 14:01, 4 users, load average: 1.91, 2.16, 2.06
Tasks: 208 total, 3 running, 202 sleeping, 0 stopped, 3 zombie
Cpu(s): 5.6%us, 2.2%sy, 0.0%ni, 91.7%id, 0.5%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1891244k total, 1782568k used, 108676k free, 22512k buffers
Swap: 2004988k total, 812400k used, 1192588k free, 550600k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16561 otto 20 0 526m 15m 7796 S 14 0.9 1:10.79
gnome-system-mo
16534 root 20 0 0 0 0 R 7 0.0 0:16.66
kworker/1:2
1215 root 20 0 275m 25m 4472 S 6 1.4 11:31.39 Xorg
16362 root 20 0 0 0 0 S 3 0.0 0:10.00
kworker/0:1
1889 otto 20 0 1470m 64m 12m S 3 3.5 10:07.92 compiz
16287 root 20 0 0 0 0 S 3 0.0 0:13.85
kworker/3:2
2306 otto 20 0 652m 14m 5056 S 2 0.8 0:31.76
gnome-terminal
17304 otto 20 0 17480 1384 964 R 1 0.1 0:00.03 top
Using commands
sudo perf record -ag sleep 30
sudo perf report
I was able to find out that the kworker threads running amok are due
to the Intel I2C driver:
...
2.91% kworker/1:2 [kernel.kallsyms] [k] na
|
--- native_read_tsc
|
|--62.97%-- delay_tsc
| |
| |--53.92%-- __udelay
| | |
| | |--50.48%-- sclhi
| | | |
| | | |--94.88%-- i2c_outb
...
2.76% kworker/1:0 [kernel.kallsyms] [k] na
|
--- native_read_tsc
|
|--69.42%-- delay_tsc
| |
| |--58.89%-- __udelay
| | |
| | |--47.38%-- sclhi
| | | |
| | | |--88.80%-- i2c_outb
...
2.20% kworker/0:0 [kernel.kallsyms] [k] na
|
--- native_read_tsc
|
|--64.58%-- delay_tsc
| |
| |--63.38%-- __udelay
| | |
| | |--47.18%-- i2c_outb.isra.4
| | | try_address
| | | bit_doAddress.isra.7
| | | bit_xfer
| | | intel_i2c_quirk_xfer
...
I've attached the entire perf report output for your analysis.
To view the stack of the process I ran cat /proc/16287/stack >
pid-16287-stack.txt, which is also attached.
Please fix the Intel driver so that it does not spawn any wild
kworker processes and publish the fix in the 12.04 mainline kernel.
I've noticed that others have this sympoms too, but I guess few are
knowledgeable enough to file a proper bug report, so I decided to do
one. For example, see comment #27 at
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793/comments/27
or http://askubuntu.com/questions/106187/lenovo-thinkpad-l520-slows-down-when-ac-power-adapter-is-plugged-in
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-24-generic 3.2.0-24.37
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: otto 1897 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0x93d40000 irq 44'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:111d76e7,1028049b,00100102
HDA:80862805,80860101,00100000'
Controls : 37
Simple ctrls : 13
CheckboxSubmission: d8cea1222d756fdd8d727e88eb0e4a11
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Fri May 11 22:05:56 2012
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=affcc5fa-3b4d-40de-aec2-259585dbd9e3
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
MachineType: Dell Inc. Latitude E5420
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic
root=UUID=0fc070a9-5f2c-41fc-b8f0-6e0a91fa1426 ro quiet
i915.semaphores=1 pcie_aspm=force
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home
directory /home/otto not ours.
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic N/A
linux-backports-modules-3.2.0-24-generic N/A
linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-04-09 (31 days ago)
dmi.bios.date: 02/22/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A00
dmi.board.name: 08N8FC
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA00:bd02/22/2011:svnDellInc.:pnLatitudeE5420:pvr01:rvnDellInc.:rn08N8FC:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5420
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/998204
Title:
Intel chipset driver bug on Ubuntu certified Dell Latitude E5420:
connecting power cord makes kworker run amok
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
I've noticed that sometimes when I'm running on battery and then
insert the power cord, the system slows down significantly. When I
remove the power cord, it runs fine again, and when I reattach the
power cord the system slows down again.
I'm running the latest Ubuntu 12.04 with all updates on a pre-
installed Dell Latitude E5420 that is supposed to work perfectly with
Ubuntu, since it is officially certified.
While the sluggishness happens, running 'top' shows several kworker processes:
top - 21:29:24 up 14:01, 4 users, load average: 1.91, 2.16, 2.06
Tasks: 208 total, 3 running, 202 sleeping, 0 stopped, 3 zombie
Cpu(s): 5.6%us, 2.2%sy, 0.0%ni, 91.7%id, 0.5%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1891244k total, 1782568k used, 108676k free, 22512k buffers
Swap: 2004988k total, 812400k used, 1192588k free, 550600k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16561 otto 20 0 526m 15m 7796 S 14 0.9 1:10.79 gnome-system-mo
16534 root 20 0 0 0 0 R 7 0.0 0:16.66 kworker/1:2
1215 root 20 0 275m 25m 4472 S 6 1.4 11:31.39 Xorg
16362 root 20 0 0 0 0 S 3 0.0 0:10.00 kworker/0:1
1889 otto 20 0 1470m 64m 12m S 3 3.5 10:07.92 compiz
16287 root 20 0 0 0 0 S 3 0.0 0:13.85 kworker/3:2
2306 otto 20 0 652m 14m 5056 S 2 0.8 0:31.76 gnome-terminal
17304 otto 20 0 17480 1384 964 R 1 0.1 0:00.03 top
Using commands
sudo perf record -ag sleep 30
sudo perf report
I was able to find out that the kworker threads running amok are due to the Intel I2C driver:
...
2.91% kworker/1:2 [kernel.kallsyms] [k] na
|
--- native_read_tsc
|
|--62.97%-- delay_tsc
| |
| |--53.92%-- __udelay
| | |
| | |--50.48%-- sclhi
| | | |
| | | |--94.88%-- i2c_outb
...
2.76% kworker/1:0 [kernel.kallsyms] [k] na
|
--- native_read_tsc
|
|--69.42%-- delay_tsc
| |
| |--58.89%-- __udelay
| | |
| | |--47.38%-- sclhi
| | | |
| | | |--88.80%-- i2c_outb
...
2.20% kworker/0:0 [kernel.kallsyms] [k] na
|
--- native_read_tsc
|
|--64.58%-- delay_tsc
| |
| |--63.38%-- __udelay
| | |
| | |--47.18%-- i2c_outb.isra.4
| | | try_address
| | | bit_doAddress.isra.7
| | | bit_xfer
| | | intel_i2c_quirk_xfer
...
I've attached the entire perf report output for your analysis.
To view the stack of the process I ran cat /proc/16287/stack >
pid-16287-stack.txt, which is also attached.
Please fix the Intel driver so that it does not spawn any wild kworker processes and publish the fix in the 12.04 mainline kernel. I've noticed that others have this sympoms too, but I guess few are knowledgeable enough to file a proper bug report, so I decided to do one. For example, see comment #27 at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793/comments/27 or http://askubuntu.com/questions/106187/lenovo-thinkpad-l520-slows-down-when-ac-power-adapter-is-plugged-in
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-24-generic 3.2.0-24.37
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: otto 1897 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0x93d40000 irq 44'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:111d76e7,1028049b,00100102 HDA:80862805,80860101,00100000'
Controls : 37
Simple ctrls : 13
CheckboxSubmission: d8cea1222d756fdd8d727e88eb0e4a11
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Fri May 11 22:05:56 2012
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=affcc5fa-3b4d-40de-aec2-259585dbd9e3
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
MachineType: Dell Inc. Latitude E5420
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=0fc070a9-5f2c-41fc-b8f0-6e0a91fa1426 ro quiet i915.semaphores=1 pcie_aspm=force
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/otto not ours.
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic N/A
linux-backports-modules-3.2.0-24-generic N/A
linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-04-09 (31 days ago)
dmi.bios.date: 02/22/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A00
dmi.board.name: 08N8FC
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA00:bd02/22/2011:svnDellInc.:pnLatitudeE5420:pvr01:rvnDellInc.:rn08N8FC:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5420
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/998204/+subscriptions
References
