I'm experiencing the same issue, but in my case it was still reproducible after updating the kernel to the 4.3-rc6 version, which I installed from the ubuntu mainline PPA.
In my case it can always be triggered by changing the volume while running the openra game(installed from the wily-getdeb/games PPA), likely due to the translucent notification bubble. Another trigger is the Skype notification that shows when contacts are connecting or disconnecting. Here's my kernel oops output shown in dmesg: http://pastebin.com/fEPSX8Jw I'm running Ubuntu 15.10 x86_64 on a Dell latitude E7240 laptop, with the embedded graphics card 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b) In my case the mouse is still showing and can be moved, but I can't interact with the game. I can recover is by killing Xorg. -- 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/1492764 Title: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0) Status in linux package in Ubuntu: Incomplete Bug description: System: Kubuntu 15.10 Since kernel version 4.2 I have a few of this errors: Sep 06 16:16:35 benediktZ50-70 kernel: [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0) Sep 06 16:16:35 benediktZ50-70 kernel: ------------[ cut here ]------------ Sep 06 16:16:35 benediktZ50-70 kernel: WARNING: CPU: 0 PID: 187 at /build/linux-4dBub_/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x2c5/0x440 [i915]() Sep 06 16:16:35 benediktZ50-70 kernel: pipe state doesn't match! Sep 06 16:16:35 benediktZ50-70 kernel: Modules linked in: rtsx_usb_sdmmc rtsx_usb i915 i2c_algo_bit drm_kms_helper psmouse ahci drm libahci r8169 mii sdhci_acpi video sdhci i2c_hid hid Sep 06 16:16:35 benediktZ50-70 kernel: CPU: 0 PID: 187 Comm: plymouthd Tainted: G W 4.2.0-7-generic #7-Ubuntu Sep 06 16:16:35 benediktZ50-70 kernel: Hardware name: LENOVO 20354/Lancer 5A5, BIOS 9BCN91WW 07/21/2015 Sep 06 16:16:35 benediktZ50-70 kernel: ffffffffc023f1e8 ffff8802413277e8 ffffffff817b0465 0000000000000000 Sep 06 16:16:35 benediktZ50-70 kernel: ffff880241327838 ffff880241327828 ffffffff81076536 ffff880241327858 Sep 06 16:16:35 benediktZ50-70 kernel: ffff8802413278c0 ffff880241152000 0000000000000001 ffff880241152350 Sep 06 16:16:35 benediktZ50-70 kernel: Call Trace: Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffff817b0465>] dump_stack+0x45/0x57 Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffff81076536>] warn_slowpath_common+0x86/0xc0 Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffff810765b6>] warn_slowpath_fmt+0x46/0x50 Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc01d3091>] ? intel_pipe_config_compare+0xb31/0xc60 [i915] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc01d3485>] check_crtc_state+0x2c5/0x440 [i915] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc01e6f3e>] intel_modeset_check_state+0x20e/0x6b0 [i915] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc01e80e7>] intel_crtc_set_config+0x4c7/0x580 [i915] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc009f915>] ? drm_mode_create+0x25/0x60 [drm] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc0099036>] drm_mode_set_config_internal+0x66/0x100 [drm] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc009d5f8>] drm_mode_setcrtc+0x3a8/0x4c0 [drm] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc008e365>] drm_ioctl+0x125/0x610 [drm] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffffc009d250>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffff811fffd5>] do_vfs_ioctl+0x285/0x470 Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffff811ac159>] ? do_munmap+0x349/0x480 Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffff81200239>] SyS_ioctl+0x79/0x90 Sep 06 16:16:35 benediktZ50-70 kernel: [<ffffffff817b6cf2>] entry_SYSCALL_64_fastpath+0x16/0x75 Sep 06 16:16:35 benediktZ50-70 kernel: ---[ end trace 724377a3c01e4270 ]--- I will check next week if these errors have any impact on my system. This is a Nvidia Optimus System with the Intel graphic card activated by default. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-7-generic 4.2.0-7.7 ProcVersionSignature: Ubuntu 4.2.0-7.7-generic 4.2.0 Uname: Linux 4.2.0-7-generic x86_64 ApportVersion: 2.18-0ubuntu9 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: benedikt 1550 F.... pulseaudio /dev/snd/controlC1: benedikt 1550 F.... pulseaudio CurrentDesktop: KDE Date: Sun Sep 6 16:22:48 2015 HibernationDevice: UUID=3383b02e-b89c-462c-903a-cb936e81b2bf InstallationDate: Installed on 2014-12-21 (259 days ago) InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141218) MachineType: LENOVO 20354 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-7-generic root=UUID=b549945a-67ac-4d14-849c-b54e561d47cc ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-7-generic N/A linux-backports-modules-4.2.0-7-generic N/A linux-firmware 1.147 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/21/2015 dmi.bios.vendor: LENOVO dmi.bios.version: 9BCN91WW dmi.board.asset.tag: No Asset Tag dmi.board.name: Lancer 5A5 dmi.board.vendor: LENOVO dmi.board.version: 31900058WIN dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Z50-70 dmi.modalias: dmi:bvnLENOVO:bvr9BCN91WW:bd07/21/2015:svnLENOVO:pn20354:pvrLenovoZ50-70:rvnLENOVO:rnLancer5A5:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoZ50-70: dmi.product.name: 20354 dmi.product.version: Lenovo Z50-70 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1492764/+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