Did this issue start happening after an update/upgrade? Was there a kernel version where you were not having this particular problem? This will help determine if the problem you are seeing is the result of a regression, and when this regression was introduced. If this is a regression, we can perform a kernel bisect to identify the commit that introduced the problem.
** Changed in: linux (Ubuntu) Importance: Undecided => High ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Tags added: kernel-da-key -- 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/1631719 Title: Intel GMA965 DRM hanging on yakkety Status in linux package in Ubuntu: Incomplete Bug description: Upgrades to Yakkety in feature freeze with kernel 4.8.0-21-generic. System regularly hangs for 10 second intervals which is very noticeable in boot process. Cause seems to be the Intel GMA965 DRM support causing regular kernel warnings: WARNING: CPU: 0 PID: 1183 at /build/linux-JqzU2_/linux-4.8.0/drivers/gpu/drm/drm_irq.c:1224 drm_wait_one_vblank+0x1b6/0x1c0 [drm] The problem seems to start very early in the boot process, possible already in GRUB, definitely when the kernel image is first started. Workaround: Boot into Ubuntu recovery mode and then resume into graphical system. In this case the problem does not occur. Disabling GRUB graphics with GRUB_TERMINAL=console does not help ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: linux-image-4.8.0-21-generic 4.8.0-21.23 ProcVersionSignature: Ubuntu 4.8.0-21.23-generic 4.8.0 Uname: Linux 4.8.0-21-generic x86_64 ApportVersion: 2.20.3-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: michael 2377 F.... pulseaudio Date: Sun Oct 9 11:10:10 2016 HibernationDevice: RESUME=UUID=34b8481d-d92b-4611-820b-c0c2b607f6ab InstallationDate: Installed on 2012-08-21 (1509 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: LENOVO 8943DNG PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcEnviron: LANGUAGE=en_US TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-21-generic root=UUID=2835f778-bc9c-463b-8ee1-b337e0efe6d7 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.8.0-21-generic N/A linux-backports-modules-4.8.0-21-generic N/A linux-firmware 1.161 SourcePackage: linux UpgradeStatus: Upgraded to yakkety on 2016-10-08 (0 days ago) dmi.bios.date: 10/22/2007 dmi.bios.vendor: LENOVO dmi.bios.version: 7QET27WW (1.09 ) dmi.board.name: 8943DNG dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr7QET27WW(1.09):bd10/22/2007:svnLENOVO:pn8943DNG:pvrThinkPadR61:rvnLENOVO:rn8943DNG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 8943DNG dmi.product.version: ThinkPad R61 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1631719/+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