I've had the same problem here.... I have a Thinkpad T450s since 5/1/2015 with the same chip (though linux wants the 7265D ucode though). It was unstable, even when upgrading to the 4.0.1 mainline kernel. What actually kept things stable is by disabling wireless-n.
All the details of how I fixed it from other people: http://www.reddit.com/r/thinkpad/comments/34ln2h/t450s_ubuntu_1504_unstable_wifi/ Pretty much.... I had to get the latest 7265 ucodes and put it into /lib/firmware: - sudo rm /lib/firmware/iwlwifi* - sudo cp /path/to/iwlwifi-7265*-12.ucode /lib/firmware/. - reboot.... Normal browsing seemed to be more stable but things like streams, speed tests, and youtube would tank the connection. Then I had to disable wireless-n: echo 'options iwlwifi 11n_disable=1' | sudo tee -a /etc/modprobe.d/iwlwifi.conf now it's completely stable, but I have to lose wireless-n as a result. It's not your fault.... It's Intel's... -- 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/1437913 Title: Wifi unstable on vivid with Intel 7265 (Thinkpad X250) Status in The Linux Kernel: Unknown Status in linux package in Ubuntu: Triaged Bug description: After upgrading from utopic to vivid beta, wifi on the Intel 7265 on my Thinkpad X250 has become unstable (linux-image 3.19.0-10.10, linux- firmware 1.143). I'm seeing two primary problems: * On 5GHz 802.11ac, I'll get DEAUTH_LEAVING almost exactly every minute, followed by an immediate reconnect. * On both 2.4GHz and 5GHz, all network activity will cease after 10-20 minutes. A manual reconnect will temporarily fix network activity. This is complicated by the fact that the newer firmware requires kernel 3.19 and kernel 3.19 requires the iwlwifi-7265D*.ucode firmware instead of the old iwlwifi-7265*.ucode firmware, so it's not possible to mix/match older/newer kernel/firmware combinations, nor do a kernel bisect. FAOD, the latest utopic kernel/firmware combination (linux-image 3.16.0-33.44, linux-firmware 1.138.1) works fine, which I can use in vivid if I manually install them. I have tested ~kernel-ppa/mainline 3.19.3-031903.201503261036 and 4.0.0-040000rc5.201503230035, which exhibit the same problems. WORKAROUND: iw reg set US ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-10-generic 3.19.0-10.10 ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2 Uname: Linux 3.19.0-10-generic x86_64 ApportVersion: 2.16.2-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ryan 1862 F.... pulseaudio /dev/snd/controlC1: ryan 1862 F.... pulseaudio CurrentDesktop: Unity Date: Sun Mar 29 11:42:13 2015 HibernationDevice: RESUME=UUID=c21a0227-27e2-4c4f-8bd9-30793932acbc InstallationDate: Installed on 2015-03-07 (22 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: LENOVO 20CMCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-10-generic root=/dev/mapper/ubuntu--vg-root ro acpi_osi=Linux acpi_backlight=vendor psmouse.proto=imps quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.19.0-10-generic N/A linux-backports-modules-3.19.0-10-generic N/A linux-firmware 1.143 SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-03-29 (0 days ago) dmi.bios.date: 01/23/2015 dmi.bios.vendor: LENOVO dmi.bios.version: N10ET28W (1.05 ) dmi.board.asset.tag: Not Available dmi.board.name: 20CMCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0E50512 STD dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN10ET28W(1.05):bd01/23/2015:svnLENOVO:pn20CMCTO1WW:pvrThinkPadX250:rvnLENOVO:rn20CMCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20CMCTO1WW dmi.product.version: ThinkPad X250 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1437913/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
