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I system is hanging due to a kernel problem after the latest update to
15.10.   Here you go:

FVt3xv8HzzZNK8XdGDNr33.002172] ------------[ cut here ]------------
[1259033.002223] WARNING: CPU: 0 PID: 4998 at /build/linux-shHg5U/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:3296 intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]()
[1259033.002225] WARN_ON(ret)
[1259033.002228] Modules linked in:
[1259033.002231]  ctr ccm arc4 rt73usb rt2x00usb rt2x00lib mac80211 cfg80211 cpuid isofs nls_utf8 btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c cdc_acm bnep nfnetlink_queue nfnetlink_log nfnetlink bluetooth binfmt_misc gpio_ich joydev input_leds snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm serio_raw snd_seq_midi snd_seq_midi_event snd_rawmidi lpc_ich snd_seq snd_seq_device snd_timer snd 8250_fintek tpm_infineon soundcore shpchp mac_hid parport_pc ppdev lp parport autofs4 drbg ansi_cprng xts gf128mul algif_skcipher af_alg dm_crypt hid_logitech_hidpp hid_logitech_dj hid_generic usbhid hid uas usb_storage i915 video i2c_algo_bit drm_kms_helper drm psmouse firewire_ohci firewire_core e100 pata_acpi mii crc_itu_t floppy

[1259033.002312] CPU: 0 PID: 4998 Comm: kworker/u4:2 Tainted: G        W       4.2.0-22-generic #27-Ubuntu
[1259033.002315] Hardware name:                  /D915GAG                        , BIOS EV91510A.15A.0067.2004.0722.1717 07/22/2004
[1259033.002344] Workqueue: i915-hangcheck i915_hangcheck_elapsed [i915]
[1259033.002347]  c1a649a7 ee2a4f53 00000000 c0419d48 c175e5f1 c0419d88 c0419d78 c106a867
[1259033.002354]  f8bb098d c0419da8 00001386 f8ba2ab0 00000ce0 f8b4506c f8b4506c f5c10000
[1259033.002361]  f5acf834 00000001 c0419d94 c106a8de 00000009 c0419d88 f8bb098d c0419da8
[1259033.002368] Call Trace:
[1259033.002378]  [<c175e5f1>] dump_stack+0x41/0x52
[1259033.002384]  [<c106a867>] warn_slowpath_common+0x87/0xc0
[1259033.002417]  [<f8b4506c>] ? intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]
[1259033.002447]  [<f8b4506c>] ? intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]
[1259033.002451]  [<c106a8de>] warn_slowpath_fmt+0x3e/0x60
[1259033.002482]  [<f8b4506c>] intel_crtc_wait_for_pending_flips+0x17c/0x220 [i915]
[1259033.002512]  [<f8965fe4>] ? drm_modeset_lock_all_crtcs+0x84/0x90 [drm]
[1259033.002543]  [<f8b46434>] intel_crtc_disable_planes+0x34/0xf0 [i915]
[1259033.002574]  [<f8b4659a>] intel_prepare_reset+0x6a/0x80 [i915]
[1259033.002601]  [<f8b187b7>] i915_handle_error+0x147/0x6e0 [i915]
[1259033.002606]  [<c10be43d>] ? log_store+0x1cd/0x210
[1259033.002612]  [<c10bfd11>] ? vprintk_default+0x41/0x60
[1259033.002639]  [<f8b18fd3>] i915_hangcheck_elapsed+0x233/0x410 [i915]
[1259033.002644]  [<c1081305>] process_one_work+0x155/0x3e0
[1259033.002648]  [<c10815c7>] worker_thread+0x37/0x490
[1259033.002652]  [<c1081590>] ? process_one_work+0x3e0/0x3e0
[1259033.002656]  [<c1086ca6>] kthread+0xa6/0xc0
[1259033.002661]  [<c1764241>] ret_from_kernel_thread+0x21/0x30
[1259033.002665]  [<c1086c00>] ? kthread_create_on_node+0x170/0x170
[1259033.002668] ---[ end trace 654780e28897319a ]---

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment wily
-- 
I system is hanging due to a kernel problem after the latest update to 15.10.   Here you go:
https://bugs.launchpad.net/bugs/1532215
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