Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.9 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc3 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1637704 Title: iwlwifi crash on thinkpad yoga 12 2015 Status in linux package in Ubuntu: Incomplete Bug description: version_signature Ubuntu 4.4.0-43.63-generic 4.4.21 The wifi fails shortly after boot, especially when using more bandwidth, requiring a reboot to reconnect to networks--sometimes even multiple reboots. The issue started after upgrading to 16.04; before, using the soft-switch for wifi on the keyboard, or searching for a random hidden network would eliminate any connection issues. Now, attempting to turn on wireless networking after the driver crashes results in a temporary slowdown of my laptop, then nothing. Bug presents in 4.4.0-45 and 4.4.0-43. Attempted a workaround by disabling power save, disabling watchdog, and disabling 11n. ~$ iwconfig lo no wireless extensions. wlp4s0 IEEE 802.11abg ESSID:"_______" Mode:Managed Frequency:2.462 GHz Access Point: 20:76:00:48:1A:B5 Bit Rate:54 Mb/s Tx-Power=22 dBm Retry short limit:7 RTS thr:off Fragment thr:off Power Management:on Link Quality=58/70 Signal level=-52 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:6 Invalid misc:8993 Missed beacon:0 docker0 no wireless extensions. ~$ ifconfig wlp4s0 wlp4s0 Link encap:Ethernet HWaddr 5c:e0:c5:09:9f:89 inet addr:192.168.0.112 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::1cfd:58bf:beb9:d49/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:40907 errors:0 dropped:0 overruns:0 frame:0 TX packets:25987 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:42558260 (42.5 MB) TX bytes:6272926 (6.2 MB) Restarting network-manager causes same error message as the original failure; output of dmesg | grep iwl is attached. After crash, wlp4s0 no longer shows up under ifconfig or iwconfig. Same error occurs on iwlwifi-7256D-13.ucode and iwlwifi- 7256D-16.ucode. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-43-generic 4.4.0-43.63 ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21 Uname: Linux 4.4.0-43-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: gwen 2083 F.... pulseaudio /dev/snd/controlC1: gwen 2083 F.... pulseaudio CurrentDesktop: Unity Date: Sat Oct 29 03:53:50 2016 HibernationDevice: RESUME=UUID=2c70b958-e0e0-4dc1-a37e-71ef9d056fb6 InstallationDate: Installed on 2016-01-23 (280 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: LENOVO 20DL0038US ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-43-generic root=UUID=1ee8c80d-12f6-4663-b419-dbc5bd18f6d3 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-43-generic N/A linux-backports-modules-4.4.0-43-generic N/A linux-firmware 1.157.4 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-07-13 (107 days ago) dmi.bios.date: 02/02/2015 dmi.bios.vendor: LENOVO dmi.bios.version: JEET58WW (1.07 ) dmi.board.asset.tag: Not Available dmi.board.name: 20DL0038US dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJEET58WW(1.07):bd02/02/2015:svnLENOVO:pn20DL0038US:pvrThinkPadS1Yoga12:rvnLENOVO:rn20DL0038US:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20DL0038US dmi.product.version: ThinkPad S1 Yoga 12 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1637704/+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
