Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.6 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/v4.6-rc7-wily/ ** 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/1580697 Title: Kernel freezes after drm_wait_one_vblank timed out Status in linux package in Ubuntu: Incomplete Bug description: Using kernel 4.4.0 from Ubuntu GNOME 16.04 I get a lot of warnings 'drm_wait_one_vblank timed out' while booting and every time when I switch user or session via Alt-Fn. Example logs will be attached, I used this for saving the log: journalctl -b --system --no-pager |tee bootlog-$(uname -r)-$(lsb_release -sr) I suspect this may be related to some of my problems (slow switch, freeze, wrong VT: Alt-Fn6 roots to tty3) when switching virtual terminal. I see these messages on 16.04 or 14.04 when using kernel 4.4.0-21-generic, 4.4.0-22-generic or mainline kernel 4.4.0-040400-generic or 4.5.2-040502-generic, but mainline kernel 4.3.6-040306-generic does not throw this message and there are no problems with 4.3.6 while switching VT. --- ApportVersion: 2.20.1-0ubuntu2 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: k2 1475 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=8e0701ee-0c76-4396-bdd9-f406da205c7b InstallationDate: Installed on 2016-03-31 (41 days ago) InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Beta i386 (20160323.1) MachineType: FUJITSU SIEMENS LIFEBOOK E8310 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic root=UUID=5811fae8-2bd0-46c0-a1b3-4bd8b9f2c821 ro ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8 RelatedPackageVersions: linux-restricted-modules-4.4.0-22-generic N/A linux-backports-modules-4.4.0-22-generic N/A linux-firmware 1.157 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: xenial Uname: Linux 4.4.0-22-generic i686 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 12/27/2007 dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd. dmi.bios.version: Version 1.10 dmi.board.name: FJNB1CE dmi.board.vendor: FUJITSU dmi.board.version: 1PCP331350-03 dmi.chassis.type: 10 dmi.chassis.vendor: FUJITSU SIEMENS dmi.chassis.version: E8310 dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.10:bd12/27/2007:svnFUJITSUSIEMENS:pnLIFEBOOKE8310:pvr:rvnFUJITSU:rnFJNB1CE:rvr1PCP331350-03:cvnFUJITSUSIEMENS:ct10:cvrE8310: dmi.product.name: LIFEBOOK E8310 dmi.sys.vendor: FUJITSU SIEMENS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1580697/+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
