This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.
Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org. Once this bug is reported upstream, please add the tag: 'kernel-bug- reported-upstream'. [0] https://wiki.ubuntu.com/Bugs/Upstream/kernel ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged -- 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/1637347 Title: Xubuntu 16.10: drm errors causing slow boot Status in linux package in Ubuntu: Triaged Bug description: I have been getting drm errors since updating to 16.10 causing slow boot times. Ex: 3.830465] jhm-Inspiron-1520 kernel: input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input5 [ 13.792249] jhm-Inspiron-1520 kernel: [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:26:pipe A] flip_done timed out There is ten second gap in the above adjacent lines. I have a few of these in the journal log. These errors also cause Xorg to stall during mode setting also, as seen in the adjacent Xorg.0.log file. [ 55.988] (II) modeset(0): Output VGA-1 has no monitor section [ 66.615] (II) modeset(0): Output SVIDEO-1 has no monitor section Using the Ubuntu test kernels, the best result I have gotten is from kernel 4.5.6. At 4.6.0 the wheels start to come off the wagon. At 4.9.0 rc1 the boot stopped at the busybox initrd shell. 4.8.0 fails decompressing the hibernate image as well. ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: linux-image-4.8.0-26-generic 4.8.0-26.28 ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0 Uname: Linux 4.8.0-26-generic i686 ApportVersion: 2.20.3-0ubuntu8 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jhm 1262 F.... pulseaudio CurrentDesktop: XFCE Date: Thu Oct 27 17:02:19 2016 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=bd7562ce-d720-4e95-995e-48f0ec1a77aa InstallationDate: Installed on 2016-10-12 (15 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1) MachineType: Dell Inc. Inspiron 1520 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-26-generic root=UUID=5dc9cf92-93d8-4e84-826d-6b4d5f6e1c0d ro plymouth:debug=1 vesafb.invalid=1 RelatedPackageVersions: linux-restricted-modules-4.8.0-26-generic N/A linux-backports-modules-4.8.0-26-generic N/A linux-firmware 1.161 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to yakkety on 2016-10-15 (12 days ago) dmi.bios.date: 02/03/2008 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.name: 0KY767 dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA07:bd02/03/2008:svnDellInc.:pnInspiron1520:pvr:rvnDellInc.:rn0KY767:rvr:cvnDellInc.:ct8:cvr: dmi.product.name: Inspiron 1520 dmi.sys.vendor: Dell Inc. --- ApportVersion: 2.20.3-0ubuntu8 Architecture: i386 DistroRelease: Ubuntu 16.10 EcryptfsInUse: Yes InstallationDate: Installed on 2016-10-12 (15 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1) Package: linux (not installed) ProcEnviron: LANGUAGE=en_US TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash Tags: yakkety Uname: Linux 4.6.0-040600rc1-generic i686 UnreportableReason: The running kernel is not an Ubuntu kernel UpgradeStatus: Upgraded to yakkety on 2016-10-15 (12 days ago) UserGroups: _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1637347/+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
