SimonW, 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 CD images are available from http://cdimage.ubuntu.com/releases/ .
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 kernel in 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 and 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. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream-VERSION-NUMBER', where VERSION-NUMBER is the version number of the kernel you tested. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream-VERSION-NUMBER', where VERSION-NUMBER is the version number of the kernel you tested. If you are unable to test the mainline kernel, please comment as to why specifically you were unable to test it and add the tag: 'kernel-unable- to-test-upstream'. Please let us know your results. Thank you for your understanding. Helpful Bug Reporting Links: https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug ** Tags added: needs-kernel-logs needs-upstream-testing ** Description changed: After the update from Ubuntu 11.10 to Ubuntu 12.04. Wlan continuously disconnects (Kernel 3.2.0-23) and netweork manager tries to reconnect again. I actually never get a working connection. When I boot the old kernel of 11.10 (Kernel 3.0.0-17) Wlan works. However the speed at which the connection operates is unstable. I expect wlan to work with 12.04. Using my mobile phone I have no issues. Further I cannot remember having had any issues with Ubuntu 11.10. The version of network-manager is 0.9.4.0-0ubuntu3 I have attached the syslogs and dmesg for both kernels. I've tried to upgrade to kernel 3.4-rc3 from http://kernel.ubuntu.com /~kernel-ppa/mainline/v3.4-rc3-precise/. However in this case the sysmptoms are identic to kernel 3.2.0-23. lspci tells the following: 02:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35) + + WORKAROUND: Disabling n-mode solves the described issue: + sudo rmmod iwlwifi + sudo modprobe iwlwifi 11n_disable=1 + + You can permanently disable n-mode by issuing: + sudo echo "options iwlwifi 11n_disable=1" >/etc/modprobe.d/iwlwifi.conf ** Attachment removed: "AcpiTables.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123028/+files/AcpiTables.txt ** Attachment removed: "AplayDevices.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123030/+files/AplayDevices.txt ** Attachment removed: "BootDmesg.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123031/+files/BootDmesg.txt ** Attachment removed: "Card0.Codecs.codec.0.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123033/+files/Card0.Codecs.codec.0.txt ** Attachment removed: "Card0.Amixer.values.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123032/+files/Card0.Amixer.values.txt ** Attachment removed: "AlsaDevices.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123029/+files/AlsaDevices.txt ** Attachment removed: "Card1.Amixer.values.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123034/+files/Card1.Amixer.values.txt ** Attachment removed: "Card1.Codecs.codec.0.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123035/+files/Card1.Codecs.codec.0.txt ** Attachment removed: "Card1.Codecs.codec.1.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123036/+files/Card1.Codecs.codec.1.txt ** Attachment removed: "Card1.Codecs.codec.2.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123037/+files/Card1.Codecs.codec.2.txt ** Attachment removed: "CurrentDmesg.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123039/+files/CurrentDmesg.txt ** Attachment removed: "Lspci.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123040/+files/Lspci.txt ** Attachment removed: "Card1.Codecs.codec.3.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123038/+files/Card1.Codecs.codec.3.txt ** Attachment removed: "Lsusb.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123041/+files/Lsusb.txt ** Attachment removed: "ProcCpuinfo.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123043/+files/ProcCpuinfo.txt ** Attachment removed: "ProcInterrupts.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123044/+files/ProcInterrupts.txt ** Attachment removed: "ProcModules.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123045/+files/ProcModules.txt ** Attachment removed: "PulseList.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123046/+files/PulseList.txt ** Attachment removed: "UdevLog.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123047/+files/UdevLog.txt ** Attachment removed: "PciMultimedia.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+attachment/3123042/+files/PciMultimedia.txt ** Tags removed: apport-collected staging ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/988576 Title: Wlan connection continuously disconnects To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/988576/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
