apport information
** Tags added: apport-collected precise running-unity
** Description changed:
I've had an intermittent system hard freeze problem for 2 years. Today I
was finally able ro reproduce it.
I have a Dell Latitude E4300 laptop with Intel WiFi Link 5100 wireless
adaptor. Whenever I switch to 11Mbps speed:
$ sudo iwconfig wlan0 rate 11M
causes a total system freeze from which I cannot recover even using the
Magic SysRq+REISUB key sequence. This is especially a problem because I
think (but have no evidence) automatic switching to this speed causes
system freeze as well (which results in intermittent problems).
It is noteworthy that I can reproduce the same crash on a Lenovo
ThinkPad X230 with an Intel Ultimate-N 6300 wireless adaptor. Switching
to 11Mbps results in a total system freeze on this laptop as well. I
think the only related common module between these laptops is iwlwifi
driver.
I don't know whether this depends on my connection too or not, but here
is my connection information just in case:
$ sudo iwconfig
lo no wireless extensions.
wlan0 IEEE 802.11abgn ESSID:"XXXXXXXXXXX"
Mode:Managed Frequency:2.437 GHz Access Point: XX:XX:XX:XX:XX:XX
Bit Rate=21.7 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=51/70 Signal level=-59 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:597 Invalid misc:2117 Missed beacon:0
eth0 no wireless extensions.
- In case there is any more information I can provide to help triangulate
- the problem further, let me know.
+ In case there is any more information I can provide to help triangulate the
problem further, let me know.
+ ---
+ AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
+ ApportVersion: 2.0.1-0ubuntu12
+ Architecture: amd64
+ ArecordDevices:
+ **** List of CAPTURE Hardware Devices ****
+ card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
+ Subdevices: 1/1
+ Subdevice #0: subdevice #0
+ AudioDevicesInUse:
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: hossein 1933 F.... pulseaudio
+ Card0.Amixer.info:
+ Card hw:0 'Intel'/'HDA Intel at 0xf6adc000 irq 47'
+ Mixer name : 'Intel Cantiga HDMI'
+ Components : 'HDA:111d76b2,1028024d,00100302
HDA:80862802,80860101,00100000'
+ Controls : 26
+ Simple ctrls : 12
+ DistroRelease: Ubuntu 12.04
+ HibernationDevice: RESUME=UUID=279e54ac-43a3-4a55-a62e-7bb43680e038
+ InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
+ MachineType: Dell Inc. Latitude E4300
+ Package: linux (not installed)
+ ProcFB: 0 inteldrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic
root=UUID=d2a40456-31e0-4564-b9a1-633089047264 ro quiet splash vt.handoff=7
+ ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
+ RelatedPackageVersions:
+ linux-restricted-modules-3.2.0-29-generic N/A
+ linux-backports-modules-3.2.0-29-generic N/A
+ linux-firmware 1.79
+ Tags: precise running-unity
+ Uname: Linux 3.2.0-29-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: adm cdrom debian-tor dialout dip lpadmin plugdev sambashare sudo
+ dmi.bios.date: 12/06/2011
+ dmi.bios.vendor: Dell Inc.
+ dmi.bios.version: A24
+ dmi.board.name: 0T296D
+ dmi.board.vendor: Dell Inc.
+ dmi.chassis.type: 8
+ dmi.chassis.vendor: Dell Inc.
+ dmi.modalias:
dmi:bvnDellInc.:bvrA24:bd12/06/2011:svnDellInc.:pnLatitudeE4300:pvr:rvnDellInc.:rn0T296D:rvr:cvnDellInc.:ct8:cvr:
+ dmi.product.name: Latitude E4300
+ dmi.sys.vendor: Dell Inc.
** Attachment added: "AcpiTables.txt"
https://bugs.launchpad.net/bugs/1035889/+attachment/3258320/+files/AcpiTables.txt
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https://bugs.launchpad.net/bugs/1035889
Title:
iwlwifi causes total system freeze on certain WiFi speeds
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