I'd like to perform a reverse bisect to figure out which commit upstream fixes this regression. It would be very helpful to know the last upstream kernel that had this issue and the first kernel that did not.
Can you test the following kernels and report back? v3.13.11.10: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11.10-trusty/ v3.13.11.11: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11.11-trusty/ linux-image-3.13.0-40-generic was based on the upstream 3.13.11.10 kernel, so that upstream kernel should not have the bug. If it doesn't, we can bisect betwee 3.13.11.10 and 3.13.11.11. ** Tags added: performing-bisect -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1398585 Title: [Inter 7260] Very slow and unstable WIFI Status in linux package in Ubuntu: Incomplete Bug description: Using an Asus Zenbook UX303L, with the last kernel, wifi is almost unusable. The connection is VERY slow and keeps dropping. There was absolutely no problem with the linux-image-3.13.0-40-generic kernel. Tried turning off the power management of wlan0 without any changes. lspci -knn | grep Net -A2 02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1] (rev 6b) Subsystem: Intel Corporation Dual Band Wireless-N 7260 [8086:c160] Kernel driver in use: iwlwifi Here is the speedtest output with the last kernel: ☺ ~⮀ speedtest Retrieving speedtest.net configuration... Retrieving speedtest.net server list... Testing from Orange (***)... Selecting best server based on latency... Hosted by iperf.fr (Rouen) [315.45 km]: 15.149 ms Testing download speed........................................ Download: 19.17 Mbits/s Testing upload speed.................................................. Upload: 30.53 Mbits/s And after a rollback on the 3.13 ☺ ~⮀ speedtest Retrieving speedtest.net configuration... Retrieving speedtest.net server list... Testing from Orange (***)... Selecting best server based on latency... Hosted by TestDebit.info (Limoges) [264.48 km]: 13.848 ms Testing download speed........................................ Download: 61.95 Mbits/s Testing upload speed.................................................. Upload: 71.33 Mbits/s ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.16.0-25-generic 3.16.0-25.33~14.04.2 ProcVersionSignature: Ubuntu 3.16.0-25.33~14.04.2-generic 3.16.7 Uname: Linux 3.16.0-25-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 CurrentDesktop: GNOME Date: Tue Dec 2 22:39:01 2014 InstallationDate: Installed on 2014-11-20 (12 days ago) InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: linux-lts-utopic UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bruce 2241 F.... pulseaudio /dev/snd/pcmC1D0p: bruce 2241 F...m pulseaudio /dev/snd/controlC1: bruce 2241 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=8a3f827c-19e2-473a-aeef-d988e7b1be88 InstallationDate: Installed on 2014-11-20 (12 days ago) InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: ASUSTeK COMPUTER INC. UX303LN Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-25-generic root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash acpi_osi= vt.handoff=7 ProcVersionSignature: Ubuntu 3.16.0-25.33~14.04.2-generic 3.16.7 RelatedPackageVersions: linux-restricted-modules-3.16.0-25-generic N/A linux-backports-modules-3.16.0-25-generic N/A linux-firmware 1.127.8 Tags: trusty Uname: Linux 3.16.0-25-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 06/23/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: UX303LN.203 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UX303LN dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX303LN.203:bd06/23/2014:svnASUSTeKCOMPUTERINC.:pnUX303LN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX303LN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: UX303LN dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1398585/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
