network and time issue on idle with laptop

[Micke Persson]

Tested with Intrepid Ibex 8.10 final version (was first with alpha5 and alpha6)

Both with wired and unwired connections I get disconnected in some minutes (especially if the computer is idling or when I download a big file).

Hardware info: The output of lspci is attached. The laptop model is Clevo MobiNote, M720R T8300 with mostly intel components inside.

It should be mentioned that these disconnections also happen with the same laptop in ubuntu 8.04. They also happen with or without using the NetworkManager.

The output of dmesg will also be posted.

Please let me know if I could try something and put the result here.

Update: I have also noticed that the time is "freezing" when the computer is idling. When I get back to the computer the clock is starting again, but the time is not correct (it gets correct after a while when the ntp updates it)

Another update: Continuously pinging a host does not help to keep the connection alive (as having an instance of Rhythmbox does).

[Micke Persson (mickep)]

Small update: After a longer testing time with alpha5 I must say it works alot better with the iwlagn driver than with the iwl4965 driver in 8.04. However, the disconnections still occur after some idling time.

[Micke Persson (mickep)]

Another update: (now running the final version of intrepid ibex). The disconnections do not occur if I have Rhythmbox playing. I guess this is because Rhythmbox accesses the hard drive/network every now and then and thus somehow keeps the network alive. Otherwise disconnections still do appear.

[Andres Mujica (andres.mujica)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in LINUX.
For future reference you might be interested to know that a lot of applications have bug reporting functionality built in to them. This can be accessed via the Report a Problem option in the Help menu for the application with which you are having an issue. You can learn more about this feature at https://wiki.ubuntu.com/ReportingBugs.

[Micke Persson (mickep)]

The problem seems to go away with boot option "nohz=off" (thank you Marcus for reporting that to me). I am no sure if this is only a workaround or if this closes the bug.

[kernel-janitor (kernel-janitor)]

Hi Micke,

Please be sure to confirm this issue exists with the latest development release of Ubuntu. ISO CD images are available from http://cdimage.ubuntu.com/releases/ . Please then run following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 267719

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Micke Persson (mickep)]

Architecture: i386
DistroRelease: Ubuntu 9.10
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Alpha i386 (20090722.2)
MachineType: CLEVO Co. M720R
Package: linux (not installed)
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-3.19-generic
RelatedPackageVersions: linux-backports-modules-2.6.31-3-generic N/A
Uname: Linux 2.6.31-3-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 12/19/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: SROSA001.86C.0038.D.081219
dmi.board.name: M720R
dmi.board.vendor: CLEVO Co.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: CLEVO Co.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrSROSA001.86C.0038.D.081219:bd12/19/2008:svnCLEVOCo.:pnM720R:pvrNotApplicable:rvnCLEVOCo.:rnM720R:rvrNotApplicable:cvnCLEVOCo.:ct1:cvrN/A:
dmi.product.name: M720R
dmi.product.version: Not Applicable
dmi.sys.vendor: CLEVO Co.

[Micke Persson (mickep)]

I just want to add the comment that since I am running this on my work machine I am not able to install a new version of ubuntu at the moment to try this out. The files uploaded came from running the karmic alpha3 live CD. I hope this will still be useful.

[runout (office-runout)]

i have this problem too.

this did not happen during audio playback until ubuntu 10.04
since ubuntu 10.10: playing sound does not help anymore

[Brad Figg (brad-figg)]

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

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