I don't know if this is related, but my syslog is full of messages like this:
Oct 28 12:08:46 gondor kernel: [ 3.426755] ------------[ cut here ]------------ Oct 28 12:08:46 gondor kernel: [ 3.426766] WARNING: CPU: 1 PID: 192 at /build/linux-AxjFAn/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12326 check_crtc_state+0x2c5/0x440 [i915]() Oct 28 12:08:46 gondor kernel: [ 3.426767] pipe state doesn't match! Oct 28 12:08:46 gondor kernel: [ 3.426768] Modules linked in: rtsx_usb_sdmmc rtsx_usb hid_generic hid_logitech_hidpp hid_logitech_dj usbhid i915 i2c_algo_bit drm_kms_helper ahci libahci drm r8169 mii sdhci_acpi video sdhci i2c_hid hid Oct 28 12:08:46 gondor kernel: [ 3.426779] CPU: 1 PID: 192 Comm: plymouthd Tainted: G W 4.2.0-16-generic #19-Ubuntu Oct 28 12:08:46 gondor kernel: [ 3.426780] Hardware name: Acer Aspire VN7-571G/Aspire VN7-571G, BIOS V1.14 01/08/2015 Oct 28 12:08:46 gondor kernel: [ 3.426781] 0000000000000000 000000000d6a1f3a ffff8800359eb7c8 ffffffff817e8c09 Oct 28 12:08:46 gondor kernel: [ 3.426783] 0000000000000000 ffff8800359eb820 ffff8800359eb808 ffffffff8107b3c6 Oct 28 12:08:46 gondor kernel: [ 3.426785] ffff8800359eb848 ffff8800359eb8b0 ffff88025049c000 0000000000000001 Oct 28 12:08:46 gondor kernel: [ 3.426787] Call Trace: Oct 28 12:08:46 gondor kernel: [ 3.426790] [<ffffffff817e8c09>] dump_stack+0x45/0x57 Oct 28 12:08:46 gondor kernel: [ 3.426794] [<ffffffff8107b3c6>] warn_slowpath_common+0x86/0xc0 Oct 28 12:08:46 gondor kernel: [ 3.426796] [<ffffffff8107b455>] warn_slowpath_fmt+0x55/0x70 Oct 28 12:08:46 gondor kernel: [ 3.426805] [<ffffffffc01a9bc1>] ? intel_pipe_config_compare+0xb31/0xc60 [i915] Oct 28 12:08:46 gondor kernel: [ 3.426814] [<ffffffffc01a9fb5>] check_crtc_state+0x2c5/0x440 [i915] Oct 28 12:08:46 gondor kernel: [ 3.426827] [<ffffffffc01bdd6d>] intel_modeset_check_state+0x21d/0x6d0 [i915] Oct 28 12:08:46 gondor kernel: [ 3.426837] [<ffffffffc01bef27>] intel_crtc_set_config+0x4c7/0x580 [i915] Oct 28 12:08:46 gondor kernel: [ 3.426848] [<ffffffffc0090ee5>] ? drm_mode_create+0x25/0x60 [drm] Oct 28 12:08:46 gondor kernel: [ 3.426856] [<ffffffffc008a4c6>] drm_mode_set_config_internal+0x66/0x100 [drm] Oct 28 12:08:46 gondor kernel: [ 3.426864] [<ffffffffc008eb29>] drm_mode_setcrtc+0x3e9/0x500 [drm] Oct 28 12:08:46 gondor kernel: [ 3.426869] [<ffffffffc007f495>] drm_ioctl+0x125/0x610 [drm] Oct 28 12:08:46 gondor kernel: [ 3.426877] [<ffffffffc008e740>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] Oct 28 12:08:46 gondor kernel: [ 3.426879] [<ffffffff812108a5>] do_vfs_ioctl+0x295/0x480 Oct 28 12:08:46 gondor kernel: [ 3.426881] [<ffffffff81210b09>] SyS_ioctl+0x79/0x90 Oct 28 12:08:46 gondor kernel: [ 3.426884] [<ffffffff817ef9f2>] entry_SYSCALL_64_fastpath+0x16/0x75 Oct 28 12:08:46 gondor kernel: [ 3.426885] ---[ end trace db3b385558ce7690 ]--- Oct 28 12:08:46 gondor kernel: [ 3.428995] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0) Oct 28 12:08:46 gondor kernel: [ 3.428998] ------------[ cut here ]------------ -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1510998 Title: Xorg crashes with segfault on 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1510998/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
