Christopher, I have tried the last upstream kernel v4.0-rc3-vivid using the iwlwifi-7260-9.ucode and the latest iwlwifi-7260-12.ucode firmware.
Unfortunately the problem of varying connection speed persists with the iwlwifi-7260-12.ucode firmware which I got from the package linux- firmware_1.143. It seems the situation is ok (like in ubuntu kernel 3.13.0-40.69) with older iwlwifi-7260-9.ucode firmware which on the other hand cause the dmesg | grep iw: [ 1.232620] iwlwifi 0000:04:00.0: enabling device (0000 -> 0002) [ 1.236731] iwlwifi 0000:04:00.0: Unsupported splx structure [ 1.239633] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7260-12.ucode failed with error -2 [ 1.239647] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7260-11.ucode failed with error -2 [ 1.239654] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7260-10.ucode failed with error -2 [ 1.239656] iwlwifi 0000:04:00.0: request for firmware file 'iwlwifi-7260-10.ucode' failed. [ 1.247423] iwlwifi 0000:04:00.0: Firmware has old API version, expected v10 through v12, got v9. [ 1.247449] iwlwifi 0000:04:00.0: New firmware can be obtained from http://www.intellinuxwireless.org/. [ 1.247598] iwlwifi 0000:04:00.0: loaded firmware version 25.228.9.0 op_mode iwlmvm [ 1.330278] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144 [ 1.330407] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled [ 1.330665] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled [ 1.549345] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' [ 2.320167] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled [ 2.320391] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled the "iw dev wlan0 link" shows: freq: 2462 RX: 1740056701 bytes (1144216 packets) TX: 44916002 bytes (356171 packets) signal: -51 dBm tx bitrate: 65.0 MBit/s MCS 7 bss flags: short-slot-time dtim period: 1 beacon int: 100 where the signal with older iwlwifi-7260-9.ucode firmware keeps between (-40dBm ; -51dBm) while with iwlwifi-7260-12.ucode jumps between (-40dBm ; -99 dBm) Please let me know if there is anything else I can do to help with this issue. Thank you. Pavel -- 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/1412217 Title: Intel® Dual Band Wireless-AC 7260 drops the connection Status in linux package in Ubuntu: Incomplete Bug description: Hi I am using Xubuntu 14.04.1 with wifi card Intel® Dual Band Wireless-AC 7260. From time to time my WiFi connection speed drops, or disconnects (wpa2, 2.4GHz). This happens on kernels higher than 3.0.13-40. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-44-generic 3.13.0-44.73 ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12 Uname: Linux 3.13.0-44-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: isvoboda 1885 F.... pulseaudio /dev/snd/controlC0: isvoboda 1885 F.... pulseaudio /dev/snd/pcmC0D0p: isvoboda 1885 F...m pulseaudio CurrentDesktop: XFCE Date: Sun Jan 18 18:04:49 2015 InstallationDate: Installed on 2014-09-30 (109 days ago) InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140723) MachineType: MSI MS-7851 ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-44-generic.efi.signed root=UUID=b6e4afa1-c663-4dd8-98fc-69d94dcae276 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-44-generic N/A linux-backports-modules-3.13.0-44-generic N/A linux-firmware 1.127.11 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/21/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V5.5 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H97I AC (MS-7851) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV5.5:bd11/21/2014:svnMSI:pnMS-7851:pvr1.0:rvnMSI:rnH97IAC(MS-7851):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.name: MS-7851 dmi.product.version: 1.0 dmi.sys.vendor: MSI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1412217/+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
