The problem is still being diagnosed on kernel bugzilla, but for the moment, "iw reg set US" seems to be a workaround.
-- 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. 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
