Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.9 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/v4.9-rc4 ** Changed in: linux (Ubuntu) Importance: Undecided => High ** 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/1639506 Title: panic in i915 Status in linux package in Ubuntu: Incomplete Bug description: Linux myhost 4.4.0-45-generic #66-Ubuntu SMP Wed Oct 19 14:12:05 UTC 2016 i686 i686 i686 GNU/Linux syslog: Nov 5 21:15:45 myhost kernel: [ 53.532149] ------------[ cut here ]------------ Nov 5 21:15:45 myhost kernel: [ 53.532252] WARNING: CPU: 0 PID: 369 at /build/linux-LfgES4/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12744 intel_modeset_check_state+0x556/0x910 [i915]() Nov 5 21:15:45 myhost kernel: [ 53.532257] encoder's enabled state mismatch (expected 0, found 1) Nov 5 21:15:45 myhost kernel: [ 53.532261] Modules linked in: xt_tcpudp xt_conntrack iptable_filter ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables gpio_ich snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel ppdev snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event coretemp snd_rawmidi ax88179_178a lpc_ich serio_raw snd_seq usbnet snd_seq_device snd_timer snd shpchp soundcore parport_pc 8250_fintek mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi lp parport autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear i915 ahci psmouse r8169 libahci i2c_algo_bit drm_kms_helper pata_acpi syscopyarea sysfillrect sysimgblt fb_sys_fops drm mii fjes video Nov 5 21:15:45 myhost kernel: [ 53.532402] CPU: 0 PID: 369 Comm: kworker/0:2 Tainted: G W 4.4.0-45-generic #66-Ubuntu Nov 5 21:15:45 myhost kernel: [ 53.532406] Hardware name: /D945GSEJT , BIOS JT94510H.86A.0025.2009.0306.1639 03/06/2009 Nov 5 21:15:45 myhost kernel: [ 53.532432] Workqueue: events output_poll_execute [drm_kms_helper] Nov 5 21:15:45 myhost kernel: [ 53.532438] c1acf967 c1e2b340 00000286 f15d1d20 c13a745f f15d1d60 f89d68b8 f15d1d50 Nov 5 21:15:45 myhost kernel: [ 53.532451] c1070307 f89d89c8 f15d1d80 00000171 f89d68b8 000031c8 f896b696 f896b696 Nov 5 21:15:45 myhost kernel: [ 53.532463] f58bc5d8 f5b6ea80 f58bc5e4 f15d1d6c c107037e 00000009 f15d1d60 f89d89c8 Nov 5 21:15:45 myhost kernel: [ 53.532475] Call Trace: Nov 5 21:15:45 myhost kernel: [ 53.532488] [<c13a745f>] dump_stack+0x58/0x79 Nov 5 21:15:45 myhost kernel: [ 53.532498] [<c1070307>] warn_slowpath_common+0x87/0xc0 Nov 5 21:15:45 myhost kernel: [ 53.532585] [<f896b696>] ? intel_modeset_check_state+0x556/0x910 [i915] Nov 5 21:15:45 myhost kernel: [ 53.532667] [<f896b696>] ? intel_modeset_check_state+0x556/0x910 [i915] Nov 5 21:15:45 myhost kernel: [ 53.532674] [<c107037e>] warn_slowpath_fmt+0x3e/0x60 Nov 5 21:15:45 myhost kernel: [ 53.532757] [<f896b696>] intel_modeset_check_state+0x556/0x910 [i915] Nov 5 21:15:45 myhost kernel: [ 53.532841] [<f897711d>] intel_atomic_commit+0x4cd/0x6a0 [i915] Nov 5 21:15:45 myhost kernel: [ 53.532894] [<f875148e>] ? drm_atomic_check_only+0x1ae/0x600 [drm] Nov 5 21:15:45 myhost kernel: [ 53.532943] [<f8750129>] ? drm_modeset_lock+0x49/0xd0 [drm] Nov 5 21:15:45 myhost kernel: [ 53.532994] [<f8751912>] drm_atomic_commit+0x32/0x60 [drm] Nov 5 21:15:45 myhost kernel: [ 53.533020] [<f85e3653>] restore_fbdev_mode+0x253/0x290 [drm_kms_helper] Nov 5 21:15:45 myhost kernel: [ 53.533070] [<f8750244>] ? drm_modeset_lock_all_ctx+0x94/0xb0 [drm] Nov 5 21:15:45 myhost kernel: [ 53.533096] [<f85e56a7>] drm_fb_helper_restore_fbdev_mode_unlocked+0x27/0x70 [drm_kms_helper] Nov 5 21:15:45 myhost kernel: [ 53.533121] [<f85e571d>] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper] Nov 5 21:15:45 myhost kernel: [ 53.533146] [<f85e562c>] drm_fb_helper_hotplug_event+0xcc/0x120 [drm_kms_helper] Nov 5 21:15:45 myhost kernel: [ 53.533229] [<f898c9ba>] intel_fbdev_output_poll_changed+0x1a/0x20 [i915] Nov 5 21:15:45 myhost kernel: [ 53.533252] [<f85d86b1>] drm_kms_helper_hotplug_event+0x21/0x30 [drm_kms_helper] Nov 5 21:15:45 myhost kernel: [ 53.533276] [<f85d88a8>] output_poll_execute+0x188/0x1c0 [drm_kms_helper] Nov 5 21:15:45 myhost kernel: [ 53.533285] [<c1087751>] process_one_work+0x121/0x3f0 Nov 5 21:15:45 myhost kernel: [ 53.533292] [<c1087c2a>] worker_thread+0x20a/0x490 Nov 5 21:15:45 myhost kernel: [ 53.533300] [<c1087a20>] ? process_one_work+0x3f0/0x3f0 Nov 5 21:15:45 myhost kernel: [ 53.533306] [<c108cf06>] kthread+0xa6/0xc0 Nov 5 21:15:45 myhost kernel: [ 53.533315] [<c17b3349>] ret_from_kernel_thread+0x21/0x38 Nov 5 21:15:45 myhost kernel: [ 53.533321] [<c108ce60>] ? kthread_create_on_node+0x170/0x170 Nov 5 21:15:45 myhost kernel: [ 53.533327] ---[ end trace 361aeae89ccf24ea ]--- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1639506/+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