8086:4227 [Lenovo ThinkPad T60] WLAN connection break under load (iwl3945)

[TxSx]

How to reproduce: Watch a YouTube with Opera full screen, then jump back and forth in the video and observe connection break.

Tried with kernels:
3.13.1-031301.201401291035
3.8.0-35.50~precise1
3.8.0.35.35
Attachment is from the latest kernel.

WORKAROUND: radeon.modeset=0

WORKAROUND: Don't watch Flash videos.

---
ApportVersion: 2.13.2-0ubuntu5
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 2047 F.... pulseaudio
 /dev/snd/pcmC0D0p: ubuntu 2047 F...m pulseaudio
CasperVersion: 1.337
DistroRelease: Ubuntu 14.04
LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20140224)
MachineType: LENOVO 2008YZE
Package: linux (not installed)
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
ProcVersionSignature: Ubuntu 3.13.0-11.31-generic 3.13.3
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-11-generic N/A
 linux-backports-modules-3.13.0-11-generic N/A
 linux-firmware 1.125
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
Tags: trusty
Uname: Linux 3.13.0-11-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

_MarkForUpload: True
dmi.bios.date: 09/19/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ETD9WW (2.19 )
dmi.board.name: 2008YZE
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: L3PN735
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr79ETD9WW(2.19):bd09/19/2007:svnLENOVO:pn2008YZE:pvrThinkPadT60:rvnLENOVO:rn2008YZE:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2008YZE
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1277598

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[TxSx (ts-p42245)]

*** Collecting problem information

The collected information can be sent to the developers to improve the
application. This might take a few minutes.
ERROR: hook /usr/share/apport/general-hooks/cloud_archive.py crashed:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 719, in add_hooks_info
    symb['add_info'](self, ui)
  File "/usr/share/apport/general-hooks/cloud_archive.py", line 18, in add_info
    if '~cloud' in packaging.get_version(package) and \
  File "/usr/lib/python2.7/dist-packages/apport/packaging_impl.py", line 95, in get_version
    raise ValueError('package does not exist')
ValueError: package does not exist
No packages found matching linux.
.
***

It appears you are currently running a mainline kernel. It would be better to report this bug upstream at http://bugzilla.kernel.org/ so that the upstream kernel developers are aware of the issue. If you'd still like to file a bug against the Ubuntu kernel, please boot with an official Ubuntu kernel and re-file.

Please see syslog.txt if it is has any use.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.13 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc2-trusty/

[TxSx (ts-p42245)]

> Please test the latest v3.13 kernel[0]

Updated from
3.13.1-031301-generic #201401291035 SMP Wed Jan 29 15:55:35 UTC 2014 i686 i686 i386 GNU/Linux
to
3.13.2-031302-generic #201402061638 SMP Thu Feb 6 21:57:10 UTC 2014 i686 i686 i386 GNU/Linux

Added tag kernel-bug-exists-upstream. Workaround for this problem seems to be avoiding Abode flash plugin.

[penalvch (penalvch)]

TxSx, could you please confirm this issue exists with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains, 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 1277598

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

apport information

[TxSx (ts-p42245)]

Ran trusty-desktop-i386.iso on live-CD, installed Adobe flash plugin and watched fullscreen Youtube video with Firefox.
apport-collect was ran just after re-connect after connection break.

[TxSx (ts-p42245)]

These guys seem to have the same hardware and the same problems:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/879790?comments=all

I'm also having sound problems in with fullscreen videos.

My lspci:

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 3 (rev 02)
00:1c.3 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 02)
00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 02)
00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 02)
00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [IDE mode] (rev 02)
00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 02)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV515/M54 [Mobility Radeon X1400]
02:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller
03:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
15:00.0 CardBus bridge: Texas Instruments PCI1510 PC card Cardbus Controller

[penalvch (penalvch)]

TxSx, thank you for apport-collect'ing. Regarding your comments https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1277598/comments/21 :
>"These guys seem to have the same hardware and the same problems:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/879790?comments=all"

That report has nothing to do with this one, as the original reporter noted in the Bug Description how the sound quality is poor, not the WiFi is disconnecting.

>"I'm also having sound problems in with fullscreen videos."

As this bug report is only focused on WiFi disconnections, this is outside the scope of this report. You are welcome to file a new report about it in Ubuntu via a terminal:
ubuntu-bug audio

>"My lspci:"

You wouldn't need to provide this as it was already captured during your apport-collect, among other helpful information -> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1277598/+attachment/3996377/+files/Lspci.txt .

Despite this, could you please answer the following questions:
+ Did this problem not occur in a prior version of Ubuntu?
+ In Trusty only, could you please test the latest mainline kernel via http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc4-trusty/ and advise to the results?

[TxSx (ts-p42245)]

I'm referring to comments #64, #71 and #83 where similar symptoms are described.
Abode flash, ATI Radeon, fullscreen video, WLAN and sound relate to each other somehow.

I am a Mint user using Linux Mint Maya 13 LTS Mate.
So far I have tested with no success the following:
- the kernels suggested in this thread installed to Mint
- the Ubuntu live-CD suggested in this thread
- Xubuntu 12.04.3 LTS Precise Pangolin XFCE
- Linux Mint Debian

I can't remember how this PC behaved before Linux Mint Maya 13 LTS Mate. I can do a live-CD test if needed.

The problem still exists in 3.14.0-031400rc4-generic.

[TxSx (ts-p42245)]

Just tested live-CD having Ubuntu 11.04 + 2.6.38.8-generic. It seems to have the problem too.

[TxSx (ts-p42245)]

Updated BIOS from:
79ETD9WW (2.19 )
09/19/2007

To:
79ETE7WW (2.27 )
03/21/2011

No change in behaviour. Kernel 3.14.0-031400rc4-generic in use.
Thanks.

[penalvch (penalvch)]

TxSx, could you please provide the missing information following https://wiki.ubuntu.com/Kernel/LinuxWireless#Debugging_information_to_provide_in_your_bug_report ?

[TxSx (ts-p42245)]

I don't think wireless is the problem here. Based on a tip from another thread I did a live-CD test
using xubuntu-12.10-desktop-i386.iso (kernel Linux xubuntu 3.5.0-17-generic #28-Ubuntu SMP Tue
Oct 9 19:32:08 UTC 2012 i686 i686 i686 GNU/Linux). Playing fullscreen video with
Firefox (installed Adobe flash player 11,2,202,341) syslog stays nice and quiet. I also updated
flash to current configuration but it made no difference. I am adding lspci from Xubuntu.
When doing rough comparison on system monitors it seems the CPU load is much less on Xubuntu.
The 2nd core seems to have very little load. Current configuration has much higher CPU load and
the 2nd core has the same high load as the 1st one.

Is there anything I could search from Xubuntu to see what makes the difference?

[penalvch (penalvch)]

TxSx, you wouldn't need to add lspci again as it's already available in greater detail in prior attachments.

[TxSx (ts-p42245)]

Another workaround is to add "radeon.modeset=0" after splash to /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.modeset=0"

(Kernel mode setting to user mode setting. What is actually means for graphics card?)

After setting this there are no more WLAN breaks while watching fullscreen youtube.
Also sound problems disappear. The above setting reduces CPU load. I see no obvious troubles in video
performance. What other consequences this setting may have I don't know. I also don't know if this
works for other Linux distros or for other than Thinkpad T60 users.

I'm not sure what setting was on in Xubuntu 12.10 when I was comparing to it.

So, IMHO ATI Radeon driver developers should take a look at this problem.

[penalvch (penalvch)]

TxSx, could you please test the latest mainline kernel via http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc5-trusty/ and advise if this is reproducible?

[TxSx (ts-p42245)]

Yep, still exists. Actually you don't have to go fullscreen on Youtube. The 2nd largest screen also triggers the problem.

[penalvch (penalvch)]

TxSx, the issue you are reporting is an upstream one. Could you please report this problem through the appropriate channel by following the instructions _verbatim_ at https://wiki.ubuntu.com/Bugs/Upstream/kernel ?

Please provide a direct URL to your e-mail to the mailing list once you have made it so that it may be tracked.

Thank you for your understanding.

[TxSx (ts-p42245)]

E-mail sent to RADEON list.

[penalvch (penalvch)]

TxSx, could you please provide a direct URL to your e-mail to the mailing list once you have made it so that it may be tracked?

[TxSx (ts-p42245)]

I haven't yet received any reply to the e-mail sent. Instructions at #36 are a bit unclear.
Apparently my report gets filed to somewhere public and I will received a URL to it.