apport information ** Tags added: apport-collected
** Description changed: Hi, i already discussed the following issue already in the german forum http://forum.ubuntuusers.de/topic/netzwerk-lags-nach-kernel-update-3-13-14-04-lt/ and in your Official Ubuntu IRC Support Channel, without a solution. System: new Ubuntu: 14.04 LTS new Kernel: 3.13.0-29-generic old Ubuntu: 13.10 old Kernel: 3.11.0-19-generic wireless device: TP-LINK WND4800, Atheros chipset wireless driver: ath9k wireless operating mode: 2.4ghz @ 802.11bgn and 5ghz @ 802.11a+n wireless router: fritz!box 3390 Before upgrading to Ubuntu 14.04 LTS everything worked fine. After upgrading to Ubuntu 14.04 LTS the wireless connection produced sequently lags, when sending a ping to my wireless router. The lag sequence duration is around 5 seconds, the duration to the next lag sequence is around 100 seconds. Each ping get a reply (no requests get lost), but the delay of the reply raises up to 2000 miliseconds. Normally the ping is around 1 or 2 miliseconds. I can reproduce this behavior manually by running 'sudo iwlist wlan1 scan' and keep watching the ping in another terminal window. I also used 'iwevent' to watch on events fired by the wireless interface while the lag is happening: '01:31:13.289166 wlan1 Scan request completed' is the only message i get. When booting the 3.11 kernel everything works fine again, no lags occur. If i try to reproduce the behavior with a manual scan as described before, no lags occur, everything keeps working fine. I already tried several configurations using special driver options like "nohwcrypt" and "debug", but dmesg and syslog do not log any failures or warnings. If i downgrade the wireless router to 2.4ghz @ 802.11b+g (54mbit) the new kernel (3.13) has also no failed pings and no massive lags, but this is not a stable solution for me due to many other wireless networks in my environment. So i assume there has been something changed between the kernel 3.11 and 3.13 or the belonging ath9k driver. I thought about the wireless scanning interval of the network manager, but i think changing this would also be just a workaround than a clean solution. - Any ideas or recommendations how to solve this or how to collect more - relevant information about this issue? + Any ideas or recommendations how to solve this or how to collect more relevant information about this issue? + --- + ApportVersion: 2.14.1-0ubuntu3.2 + Architecture: i386 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC1: reiner 3154 F.... pulseaudio + /dev/snd/controlC0: reiner 3154 F.... pulseaudio + CurrentDesktop: Unity + DistroRelease: Ubuntu 14.04 + HibernationDevice: RESUME=UUID=79cac639-2340-43af-8d11-807382480b49 + InstallationDate: Installed on 2012-03-17 (824 days ago) + InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012) + MachineType: Gigabyte Technology Co., Ltd. GA-MA770-UD3 + NonfreeKernelModules: nvidia + Package: linux (not installed) + ProcFB: + + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic root=UUID=59541979-590e-42ca-a568-79027794148f ro quiet splash + ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2 + RelatedPackageVersions: + linux-restricted-modules-3.13.0-29-generic N/A + linux-backports-modules-3.13.0-29-generic N/A + linux-firmware 1.127.2 + RfKill: + 0: phy0: Wireless LAN + Soft blocked: no + Hard blocked: no + Tags: trusty + Uname: Linux 3.13.0-29-generic i686 + UpgradeStatus: Upgraded to trusty on 2014-04-21 (59 days ago) + UserGroups: adm admin cdrom dialout fuse lpadmin mythtv plugdev sambashare wireshark www-data + _MarkForUpload: True + dmi.bios.date: 12/29/2009 + dmi.bios.vendor: Award Software International, Inc. + dmi.bios.version: FG + dmi.board.name: GA-MA770-UD3 + dmi.board.vendor: Gigabyte Technology Co., Ltd. + dmi.board.version: x.x + dmi.chassis.type: 3 + dmi.chassis.vendor: Gigabyte Technology Co., Ltd. + dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFG:bd12/29/2009:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA770-UD3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA770-UD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: + dmi.product.name: GA-MA770-UD3 + dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1331860/+attachment/4134939/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1331860 Title: wireless lags To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1331860/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
