Christopher, since booting into the kernel in comment #52 I have seen this probably over a thousand times in my hourly syslog snippet:
Mar 17 20:02:34 localhost kernel: [ 824.137147] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d66db3c0 Mar 17 20:02:34 localhost kernel: [ 824.145104] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d66db900 Mar 17 20:02:34 localhost kernel: [ 824.153100] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.161098] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad3c0 Mar 17 20:02:34 localhost kernel: [ 824.169102] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.177100] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad3c0 Mar 17 20:02:34 localhost kernel: [ 824.185100] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.193139] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.201099] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.209097] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.217098] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.225095] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.233092] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.241092] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.249099] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.257114] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.265091] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.273095] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.281094] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.289092] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.289565] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.297106] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.305090] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.313092] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.321093] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.329089] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.337092] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.345095] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.353090] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.361090] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.369090] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.417087] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.425090] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.433089] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.441089] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.449089] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.457087] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.465087] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.473086] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.489086] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.569090] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.585084] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.593086] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:34 localhost kernel: [ 824.601085] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad480 Mar 17 20:02:34 localhost kernel: [ 824.609083] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d90ad0c0 Mar 17 20:02:35 localhost kernel: [ 825.337103] [drm:drm_atomic_set_fb_for_plane] Set [FB:59] for plane state ffff8800d66db000 And it just goes on and on and on. The address, I assume that's what it is, keeps changing. In fact this was right after I booted to the new kernel last night and this hourly snipped was 3.9Mb in size. Between 11pm last night and 6am this morning this did not show up in my syslog. Any ideas on what's causing it? It has to be something to do with the new kernel as I've not seen it before. -- 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/1402331 Title: System will periodically lockup with [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle Status in linux package in Ubuntu: Incomplete Bug description: I have noticed the lockups periodically since 09/13/2014. I can't remember what kernel version was in use then possibly kernel 3.13.0-35-generic or -36. It has continued periodically through versions -39; -40 and now to -43. The last time this has happened was today Dec 13 14:40:57 localhost kernel: [154858.820009] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle. At times when it locks up I will have a cursor on a black screen and will have to press the power button to restart other times it will lockup whenever I'm in an application such as Firefox or Evolution. At that time I can usually CTRL>ALT-F1 log in and run 'sudo reboot' to restart the system. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-43-generic 3.13.0-43.72 ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11 Uname: Linux 3.13.0-43-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chris 2445 F.... pulseaudio CurrentDesktop: GNOME Date: Sat Dec 13 20:22:51 2014 HibernationDevice: RESUME=UUID=bb329dc0-0642-4b6a-876a-12c2f02fb7f6 InstallationDate: Installed on 2014-10-24 (50 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. OptiPlex 780 ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic root=UUID=4254a7e9-429b-4f53-a08c-ae7ff839b98f ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-43-generic N/A linux-backports-modules-3.13.0-43-generic N/A linux-firmware 1.127.10 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/13/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A03 dmi.board.name: 0C27VV dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.asset.tag: LE0006476 dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA03:bd02/13/2010:svnDellInc.:pnOptiPlex780:pvr:rvnDellInc.:rn0C27VV:rvrA01:cvnDellInc.:ct6:cvr: dmi.product.name: OptiPlex 780 dmi.sys.vendor: Dell Inc. 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