<html>
    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Skylake complete freeze from time to time"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=95143">95143</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Skylake complete freeze from time to time
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>mar.kolya@gmail.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>I'm using Ubunty 15.10 with Oibaf drivers on lenovo laptop with i5-6200U. From
time to time system completely freezes.

After reboot I found this in syslog:

Apr 25 21:40:06 laptop kernel: [31304.322858] [drm] stuck on render ring
Apr 25 21:40:06 laptop kernel: [31304.323652] [drm] GPU HANG: ecode
9:0:0x84dffff8, in Xorg [926], reason: Ring hung, action: reset
Apr 25 21:40:06 laptop kernel: [31304.323658] [drm] GPU hangs can indicate a
bug anywhere in the entire gfx stack, including userspace.
Apr 25 21:40:06 laptop kernel: [31304.323661] [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
Apr 25 21:40:06 laptop kernel: [31304.323663] [drm] drm/i915 developers can
then reassign to the right component if it's not a kernel issue.
Apr 25 21:40:06 laptop kernel: [31304.323665] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
Apr 25 21:40:06 laptop kernel: [31304.323668] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Apr 25 21:40:06 laptop kernel: [31304.323727] ------------[ cut here
]------------
Apr 25 21:40:06 laptop kernel: [31304.323812] WARNING: CPU: 0 PID: 8711 at
/build/linux-HVWSXI/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:11008
intel_mmio_flip_work_func+0x3b2/0x3c0 [i915]()
Apr 25 21:40:06 laptop kernel: [31304.323817]
WARN_ON(__i915_wait_request(mmio_flip->req, mmio_flip->crtc->reset_counter,
false, NULL, &mmio_flip->i915->rps.mmioflips))
Apr 25 21:40:06 laptop kernel: [31304.323821] Modules linked in: snd_usb_audio
snd_usbmidi_lib hid_logitech_hidpp hid_generic hid_logitech_dj gspca_zc3xx
gspca_main cts rpcsec_gss_krb5 nfsv4 nfs lockd grace fscache rfcomm
thinkpad_acpi nvram msr nf_conntrack_netbios_ns nf_conntrack_broadcast drbg
ansi_cprng ctr ccm xt_tcpudp arc4 ip6t_rpfilter ip6t_REJEC
T nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_conntrack bnep ebtable_nat
ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat
nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security
ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4
nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_sec
urity iptable_raw iptable_filter ip_tables x_tables uvcvideo videobuf2_vmalloc
videobuf2_memops btusb btrtl btbcm btintel hid_multitouch bluetooth
videobuf2_core v4l2_common videodev usbhid media binfmt_misc snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic intel_rapl nls_iso8859_1
x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel i2c_d
esignware_platform snd_hda_codec kvm_intel i2c_designware_core snd_hda_core kvm
snd_hwdep snd_pcm ath10k_pci(OE) crct10dif_pclmul crc32_pclmul snd_seq_midi
ath10k_core(OE) snd_seq_midi_event ath(OE) snd_rawmidi mac80211(OE) aesni_intel
aes_x86_64 lrw cfg80211(OE) gf128mul glue_helper snd_seq compat(OE) ablk_helper
cryptd snd_seq_device snd_timer joydev input_l
eds snd serio_raw idma64 soundcore virt_dma mei_me shpchp mei intel_lpss_pci
ideapad_laptop sparse_keymap mac_hid intel_lpss_acpi intel_lpss acpi_pad
parport_pc auth_rpcgss ppdev sunrpc lp parport autofs4 i915 psmouse
i2c_algo_bit r8169 drm_kms_helper mii ahci drm libahci wmi video i2c_hid
pinctrl_sunrisepoint pinctrl_intel hid
Apr 25 21:40:06 laptop kernel: [31304.324141] CPU: 0 PID: 8711 Comm:
kworker/0:1 Tainted: G        W  OE   4.2.0-35-generic #40-Ubuntu
Apr 25 21:40:06 laptop kernel: [31304.324147] Hardware name: LENOVO 80R3/Flex
3-1480, BIOS D3CN27WW 10/28/2015
Apr 25 21:40:06 laptop kernel: [31304.324218] Workqueue: events
intel_mmio_flip_work_func [i915]
Apr 25 21:40:06 laptop kernel: [31304.324225]  0000000000000286
000000002232730e ffff880197e87cd8 ffffffff817f1d7e
Apr 25 21:40:06 laptop kernel: [31304.324234]  ffff880197e87d30
ffffffffc0244b00 ffff880197e87d18 ffffffff8107cb46
Apr 25 21:40:06 laptop kernel: [31304.324242]  ffff880197e87ce8
ffff8800112d0a80 ffff880243c15e40 ffff880243c1a900
Apr 25 21:40:06 laptop kernel: [31304.324249] Call Trace:
Apr 25 21:40:06 laptop kernel: [31304.324263]  [<ffffffff817f1d7e>]
dump_stack+0x63/0x81
Apr 25 21:40:06 laptop kernel: [31304.324274]  [<ffffffff8107cb46>]
warn_slowpath_common+0x86/0xc0
Apr 25 21:40:06 laptop kernel: [31304.324284]  [<ffffffff8107cbd5>]
warn_slowpath_fmt+0x55/0x70
Apr 25 21:40:06 laptop kernel: [31304.324350]  [<ffffffffc01e1862>]
intel_mmio_flip_work_func+0x3b2/0x3c0 [i915]
Apr 25 21:40:06 laptop kernel: [31304.324361]  [<ffffffff81095bc2>]
process_one_work+0x162/0x480
Apr 25 21:40:06 laptop kernel: [31304.324370]  [<ffffffff81095f2b>]
worker_thread+0x4b/0x4c0
Apr 25 21:40:06 laptop kernel: [31304.324380]  [<ffffffff81095ee0>] ?
process_one_work+0x480/0x480
Apr 25 21:40:06 laptop kernel: [31304.324389]  [<ffffffff81095ee0>] ?
process_one_work+0x480/0x480
Apr 25 21:40:06 laptop kernel: [31304.324397]  [<ffffffff8109c2b8>]
kthread+0xd8/0xf0
Apr 25 21:40:06 laptop kernel: [31304.324406]  [<ffffffff8109c1e0>] ?
kthread_create_on_node+0x1f0/0x1f0
Apr 25 21:40:06 laptop kernel: [31304.324415]  [<ffffffff817f909f>]
ret_from_fork+0x3f/0x70
Apr 25 21:40:06 laptop kernel: [31304.324423]  [<ffffffff8109c1e0>] ?
kthread_create_on_node+0x1f0/0x1f0
Apr 25 21:40:06 laptop kernel: [31304.324429] ---[ end trace 6625ebf4916c59b6
]---
Apr 25 21:40:06 laptop kernel: [31304.324449] ------------[ cut here
]------------
Apr 25 21:40:06 laptop kernel: [31304.324516] WARNING: CPU: 0 PID: 8651 at
/build/linux-HVWSXI/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:11008
intel_mmio_flip_work_func+0x3b2/0x3c0 [i915]()
Apr 25 21:40:06 laptop kernel: [31304.324520]
WARN_ON(__i915_wait_request(mmio_flip->req, mmio_flip->crtc->reset_counter,
false, NULL, &mmio_flip->i915->rps.mmioflips))
Apr 25 21:40:06 laptop kernel: [31304.324525] Modules linked in: snd_usb_audio
snd_usbmidi_lib hid_logitech_hidpp hid_generic hid_logitech_dj gspca_zc3xx
gspca_main cts rpcsec_gss_krb5 nfsv4 nfs lockd grace fscache rfcomm
thinkpad_acpi nvram msr nf_conntrack_netbios_ns nf_conntrack_broadcast drbg
ansi_cprng ctr ccm xt_tcpudp arc4 ip6t_rpfilter ip6t_REJECT nf_reject_ipv6
ipt_REJECT nf_reject_ipv4 xt_conntrack bnep ebtable_nat ebtable_broute bridge
stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6
nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter
ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat
nf_conntrack iptable_mangle iptable_security iptable_raw iptable_filter
ip_tables x_tables uvcvideo videobuf2_vmalloc videobuf2_memops btusb btrtl
btbcm btintel hid_multitouch bluetooth videobuf2_core v4l2_common videodev
usbhid media binfmt_misc snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic intel_rapl nls_iso8859_1 x86_pkg_temp_thermal
intel_powerclamp coretemp snd_hda_intel i2c_designware_platform snd_hda_codec
kvm_intel i2c_designware_core snd_hda_core kvm snd_hwdep snd_pcm ath10k_pci(OE)
crct10dif_pclmul crc32_pclmul snd_seq_midi ath10k_core(OE) snd_seq_midi_event
ath(OE) snd_rawmidi mac80211(OE) aesni_intel aes_x86_64 lrw cfg80211(OE)
gf128mul glue_helper snd_seq compat(OE) ablk_helper cryptd snd_seq_device
snd_timer joydev input_leds snd serio_raw idma64 soundcore virt_dma mei_me
shpchp mei intel_lpss_pci ideapad_laptop sparse_keymap mac_hid intel_lpss_acpi
intel_lpss acpi_pad parport_pc auth_rpcgss ppdev sunrpc lp parport autofs4 i915
psmouse i2c_algo_bit r8169 drm_kms_helper mii ahci drm libahci wmi video
i2c_hid pinctrl_sunrisepoint pinctrl_intel hid
Apr 25 21:40:06 laptop kernel: [31304.324756] CPU: 0 PID: 8651 Comm:
kworker/0:3 Tainted: G        W  OE   4.2.0-35-generic #40-Ubuntu
Apr 25 21:40:06 laptop kernel: [31304.324761] Hardware name: LENOVO 80R3/Flex
3-1480, BIOS D3CN27WW 10/28/2015
Apr 25 21:40:06 laptop kernel: [31304.324827] Workqueue: events
intel_mmio_flip_work_func [i915]
Apr 25 21:40:06 laptop kernel: [31304.324832]  0000000000000286
000000004473536b ffff880212c73cd8 ffffffff817f1d7e
Apr 25 21:40:06 laptop kernel: [31304.324840]  ffff880212c73d30
ffffffffc0244b00 ffff880212c73d18 ffffffff8107cb46
Apr 25 21:40:06 laptop kernel: [31304.324848]  ffff880212c73ce8
ffff8800112d0680 ffff880243c15e40 ffff880243c1a900
Apr 25 21:40:06 laptop kernel: [31304.324857] Call Trace:
Apr 25 21:40:06 laptop kernel: [31304.324866]  [<ffffffff817f1d7e>]
dump_stack+0x63/0x81
Apr 25 21:40:06 laptop kernel: [31304.324877]  [<ffffffff8107cb46>]
warn_slowpath_common+0x86/0xc0
Apr 25 21:40:06 laptop kernel: [31304.324886]  [<ffffffff8107cbd5>]
warn_slowpath_fmt+0x55/0x70
Apr 25 21:40:06 laptop kernel: [31304.324949]  [<ffffffffc01e1862>]
intel_mmio_flip_work_func+0x3b2/0x3c0 [i915]
Apr 25 21:40:06 laptop kernel: [31304.324960]  [<ffffffff81095bc2>]
process_one_work+0x162/0x480
Apr 25 21:40:06 laptop kernel: [31304.324968]  [<ffffffff81095f2b>]
worker_thread+0x4b/0x4c0
Apr 25 21:40:06 laptop kernel: [31304.324976]  [<ffffffff81095ee0>] ?
process_one_work+0x480/0x480
Apr 25 21:40:06 laptop kernel: [31304.324982]  [<ffffffff8109c2b8>]
kthread+0xd8/0xf0
Apr 25 21:40:06 laptop kernel: [31304.324988]  [<ffffffff8109c1e0>] ?
kthread_create_on_node+0x1f0/0x1f0
Apr 25 21:40:06 laptop kernel: [31304.324993]  [<ffffffff817f909f>]
ret_from_fork+0x3f/0x70
Apr 25 21:40:06 laptop kernel: [31304.324998]  [<ffffffff8109c1e0>] ?
kthread_create_on_node+0x1f0/0x1f0
Apr 25 21:40:06 laptop kernel: [31304.325002] ---[ end trace 6625ebf4916c59b7
]---
Apr 25 21:40:06 laptop kernel: [31304.325923] drm/i915: Resetting chip after
gpu hang
Apr 25 21:40:07 laptop kernel: [31305.359774] [drm] RC6 on

Unfortunately before reboot system is totally unresponsive, so I cannot take
GPU crash dump.</pre>
        </div>
      </p>
      <hr>
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