3 Replies Latest reply on Dec 22, 2015 10:19 AM by Amy_Intel

    problem with 2.99.917 under CentOS 7.2.1511

    metatype

      System Setup Information:
      -----------------------------------------

      System Used: Intel® NUC NUC5i5RYH
      CPU SKU: i5-5250U
      GPU SKU: Intel® HD Graphics 6000
      Graphics Driver Version: 2.99.917
      Operating System: Linux - CentOS
      OS Version: 7.2.1511 (fully updated as of 20151214)

      Monitor: Philips BDM4065UC

      Resolution: 3840x2160@60 hz

      Connection: Display Port (1.2)


      Kernel Traces:


      [  15.790687] ------------[ cut here ]------------

      [  15.790734] WARNING: at drivers/gpu/drm/i915/intel_ddi.c:2182 intel_ddi_compute_config+0x80/0x90 [i915]()

      [  15.790736] compute_config() on unknown output!

      [  15.790737] Modules linked in: xt_CHECKSUM xt_addrtype tun drbg ansi_cprng ccm ipt_MASQUERADE nf_nat_masquerade_ipv4 ip6t_rpfilter ip6t_REJECT ipt_REJECT xt_conntrack 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 vfat fat dm_cache_smq dm_cache_mq dm_cache dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio arc4 intel_powerclamp coretemp intel_rapl kvm_intel iTCO_wdt iTCO_vendor_support kvm crc32_pclmul ghash_clmulni_intel snd_hda_codec_hdmi iwlmvm mac80211 snd_hda_codec_realtek snd_hda_codec_generic aesni_intel

      [  15.790772]  lrw uvcvideo gf128mul glue_helper ablk_helper snd_hda_intel cryptd videobuf2_vmalloc videobuf2_memops videobuf2_core snd_hda_codec snd_usb_audio snd_usbmidi_lib videodev snd_hda_core snd_hwdep snd_rawmidi sg iwlwifi snd_seq snd_seq_device pcspkr cfg80211 btusb snd_pcm bluetooth rfkill mei_me snd_timer mei lpc_ich snd mfd_core i2c_i801 shpchp soundcore nuvoton_cir rc_core acpi_pad nfsd nfs_acl lockd auth_rpcgss grace sunrpc ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic usb_storage i915 crct10dif_pclmul crct10dif_common crc32c_intel ahci libahci serio_raw i2c_algo_bit libata drm_kms_helper e1000e drm ptp pps_core sdhci_acpi sdhci mmc_core video i2c_hid i2c_core dm_mirror dm_region_hash dm_log dm_mod

      [  15.790818] CPU: 0 PID: 3272 Comm: Xorg Not tainted 3.10.0-327.3.1.el7.x86_64 #1

      [  15.790820] Hardware name: \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff/NUC5i5RYB, BIOS RYBDWi35.86A.0137.2015.0107.1700 01/07/2015

      [  15.790822]  ffff8803c96f7b00 000000000c8981df ffff8803c96f7ab8 ffffffff8163516c

      [  15.790826]  ffff8803c96f7af0 ffffffff8107b200 ffff880402fd7000 000000000000000a

      [  15.790829]  ffff8803c95fac00 0000000000000001 0000000000000000 ffff8803c96f7b58

      [  15.790832] Call Trace:

      [  15.790839]  [<ffffffff8163516c>] dump_stack+0x19/0x1b

      [  15.790842]  [<ffffffff8107b200>] warn_slowpath_common+0x70/0xb0

      [  15.790845]  [<ffffffff8107b29c>] warn_slowpath_fmt+0x5c/0x80

      [  15.790873]  [<ffffffffa0263bf0>] intel_ddi_compute_config+0x80/0x90 [i915]

      [  15.790899]  [<ffffffffa024922a>] intel_modeset_compute_config+0x7ea/0x1060 [i915]

      [  15.790911]  [<ffffffffa00f4aa3>] ? drm_atomic_helper_connector_duplicate_state+0x33/0x80 [drm_kms_helper]

      [  15.790935]  [<ffffffffa024f504>] intel_crtc_set_config+0x9a4/0xff0 [i915]

      [  15.790955]  [<ffffffffa00a3db7>] drm_mode_set_config_internal+0x67/0x100 [drm]

      [  15.790973]  [<ffffffffa00a7f4c>] drm_mode_setcrtc+0xec/0x650 [drm]

      [  15.790989]  [<ffffffffa0098d39>] drm_ioctl+0x379/0x6a0 [drm]

      [  15.791004]  [<ffffffffa00a7e60>] ? drm_mode_setplane+0x1d0/0x1d0 [drm]

      [  15.791008]  [<ffffffff811f1e85>] do_vfs_ioctl+0x2e5/0x4c0

      [  15.791013]  [<ffffffff8128bbfe>] ? file_has_perm+0xae/0xc0

      [  15.791016]  [<ffffffff81640d01>] ? __do_page_fault+0xb1/0x450

      [  15.791019]  [<ffffffff811f2101>] SyS_ioctl+0xa1/0xc0

      [  15.791023]  [<ffffffff816458c9>] system_call_fastpath+0x16/0x1b

      [  15.791025] ---[ end trace d12991de512304b0 ]---

      [  15.791027] ------------[ cut here ]------------

      [  15.791049] WARNING: at drivers/gpu/drm/i915/intel_dp.c:140 intel_dp_max_link_bw.isra.7+0x31/0x60 [i915]()

      [  15.791051] invalid max DP link bw val 0, using 1.62Gbps

      [  15.791052] Modules linked in: xt_CHECKSUM xt_addrtype tun drbg ansi_cprng ccm ipt_MASQUERADE nf_nat_masquerade_ipv4 ip6t_rpfilter ip6t_REJECT ipt_REJECT xt_conntrack 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 vfat fat dm_cache_smq dm_cache_mq dm_cache dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio arc4 intel_powerclamp coretemp intel_rapl kvm_intel iTCO_wdt iTCO_vendor_support kvm crc32_pclmul ghash_clmulni_intel snd_hda_codec_hdmi iwlmvm mac80211 snd_hda_codec_realtek snd_hda_codec_generic aesni_intel

      [  15.791092]  lrw uvcvideo gf128mul glue_helper ablk_helper snd_hda_intel cryptd videobuf2_vmalloc videobuf2_memops videobuf2_core snd_hda_codec snd_usb_audio snd_usbmidi_lib videodev snd_hda_core snd_hwdep snd_rawmidi sg iwlwifi snd_seq snd_seq_device pcspkr cfg80211 btusb snd_pcm bluetooth rfkill mei_me snd_timer mei lpc_ich snd mfd_core i2c_i801 shpchp soundcore nuvoton_cir rc_core acpi_pad nfsd nfs_acl lockd auth_rpcgss grace sunrpc ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic usb_storage i915 crct10dif_pclmul crct10dif_common crc32c_intel ahci libahci serio_raw i2c_algo_bit libata drm_kms_helper e1000e drm ptp pps_core sdhci_acpi sdhci mmc_core video i2c_hid i2c_core dm_mirror dm_region_hash dm_log dm_mod

      [  15.791132] CPU: 0 PID: 3272 Comm: Xorg Tainted: G        W      ------------  3.10.0-327.3.1.el7.x86_64 #1

      [  15.791134] Hardware name: \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff/NUC5i5RYB, BIOS RYBDWi35.86A.0137.2015.0107.1700 01/07/2015

      [  15.791135]  ffff8803c96f7a18 000000000c8981df ffff8803c96f79d0 ffffffff8163516c

      [  15.791139]  ffff8803c96f7a08 ffffffff8107b200 ffff8804026f1000 0000000000000000

      [  15.791142]  ffffffffa02960e8 ffff8803c96f7b08 0000000000000004 ffff8803c96f7a70

      [  15.791145] Call Trace:

      [  15.791149]  [<ffffffff8163516c>] dump_stack+0x19/0x1b

      [  15.791152]  [<ffffffff8107b200>] warn_slowpath_common+0x70/0xb0

      [  15.791158]  [<ffffffff8107b29c>] warn_slowpath_fmt+0x5c/0x80

      [  15.791164]  [<ffffffff8162ebfc>] ? printk+0x77/0x8e

      [  15.791187]  [<ffffffffa0268291>] intel_dp_max_link_bw.isra.7+0x31/0x60 [i915]

      [  15.791212]  [<ffffffffa0269a1b>] intel_dp_common_rates+0x4b/0x100 [i915]

      [  15.791236]  [<ffffffffa026a09a>] intel_dp_compute_config+0xca/0x800 [i915]

      [  15.791261]  [<ffffffffa0263bb9>] intel_ddi_compute_config+0x49/0x90 [i915]

      [  15.791284]  [<ffffffffa024922a>] intel_modeset_compute_config+0x7ea/0x1060 [i915]

      [  15.791295]  [<ffffffffa00f4aa3>] ? drm_atomic_helper_connector_duplicate_state+0x33/0x80 [drm_kms_helper]

      [  15.791316]  [<ffffffffa024f504>] intel_crtc_set_config+0x9a4/0xff0 [i915]

      [  15.791333]  [<ffffffffa00a3db7>] drm_mode_set_config_internal+0x67/0x100 [drm]

      [  15.791349]  [<ffffffffa00a7f4c>] drm_mode_setcrtc+0xec/0x650 [drm]

      [  15.791364]  [<ffffffffa0098d39>] drm_ioctl+0x379/0x6a0 [drm]

      [  15.791378]  [<ffffffffa00a7e60>] ? drm_mode_setplane+0x1d0/0x1d0 [drm]

      [  15.791382]  [<ffffffff811f1e85>] do_vfs_ioctl+0x2e5/0x4c0

      [  15.791385]  [<ffffffff8128bbfe>] ? file_has_perm+0xae/0xc0

      [  15.791388]  [<ffffffff81640d01>] ? __do_page_fault+0xb1/0x450

      [  15.791392]  [<ffffffff811f2101>] SyS_ioctl+0xa1/0xc0

      [  15.791395]  [<ffffffff816458c9>] system_call_fastpath+0x16/0x1b

      [  15.791397] ---[ end trace d12991de512304b1 ]---

       

      [ 1787.444524] ------------[ cut here ]------------

      [ 1787.444561] WARNING: at drivers/gpu/drm/i915/intel_ddi.c:2182 intel_ddi_compute_config+0x80/0x90 [i915]()

      [ 1787.444562] compute_config() on unknown output!

      [ 1787.444563] Modules linked in: tcp_lp fuse xt_CHECKSUM xt_addrtype tun drbg ansi_cprng ccm ipt_MASQUERADE nf_nat_masquerade_ipv4 ip6t_rpfilter ip6t_REJECT ipt_REJECT xt_conntrack 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 vfat fat dm_cache_smq dm_cache_mq dm_cache dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio arc4 intel_powerclamp coretemp intel_rapl kvm_intel iTCO_wdt iTCO_vendor_support kvm crc32_pclmul ghash_clmulni_intel snd_hda_codec_hdmi iwlmvm mac80211 snd_hda_codec_realtek snd_hda_codec_generic

      [ 1787.444590]  aesni_intel lrw uvcvideo gf128mul glue_helper ablk_helper snd_hda_intel cryptd videobuf2_vmalloc videobuf2_memops videobuf2_core snd_hda_codec snd_usb_audio snd_usbmidi_lib videodev snd_hda_core snd_hwdep snd_rawmidi sg iwlwifi snd_seq snd_seq_device pcspkr cfg80211 btusb snd_pcm bluetooth rfkill mei_me snd_timer mei lpc_ich snd mfd_core i2c_i801 shpchp soundcore nuvoton_cir rc_core acpi_pad nfsd nfs_acl lockd auth_rpcgss grace sunrpc ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic usb_storage i915 crct10dif_pclmul crct10dif_common crc32c_intel ahci libahci serio_raw i2c_algo_bit libata drm_kms_helper e1000e drm ptp pps_core sdhci_acpi sdhci mmc_core video i2c_hid i2c_core dm_mirror dm_region_hash dm_log dm_mod

      [ 1787.444622] CPU: 0 PID: 7503 Comm: Xorg Tainted: G        W      ------------   3.10.0-327.3.1.el7.x86_64 #1

      [ 1787.444623] Hardware name: \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff/NUC5i5RYB, BIOS RYBDWi35.86A.0137.2015.0107.1700 01/07/2015

      [ 1787.444625]  ffff88040361bb00 00000000a4f7636a ffff88040361bab8 ffffffff8163516c

      [ 1787.444627]  ffff88040361baf0 ffffffff8107b200 ffff880402fd7000 000000000000000a

      [ 1787.444629]  ffff8803e9cd2800 0000000000000001 0000000000000000 ffff88040361bb58

      [ 1787.444631] Call Trace:

      [ 1787.444636]  [<ffffffff8163516c>] dump_stack+0x19/0x1b

      [ 1787.444639]  [<ffffffff8107b200>] warn_slowpath_common+0x70/0xb0

      [ 1787.444641]  [<ffffffff8107b29c>] warn_slowpath_fmt+0x5c/0x80

      [ 1787.444668]  [<ffffffffa0263bf0>] intel_ddi_compute_config+0x80/0x90 [i915]

      [ 1787.444688]  [<ffffffffa024922a>] intel_modeset_compute_config+0x7ea/0x1060 [i915]

      [ 1787.444700]  [<ffffffffa00f4aa3>] ? drm_atomic_helper_connector_duplicate_state+0x33/0x80 [drm_kms_helper]

      [ 1787.444720]  [<ffffffffa024f504>] intel_crtc_set_config+0x9a4/0xff0 [i915]

      [ 1787.444736]  [<ffffffffa00a3db7>] drm_mode_set_config_internal+0x67/0x100 [drm]

      [ 1787.444749]  [<ffffffffa00a7f4c>] drm_mode_setcrtc+0xec/0x650 [drm]

      [ 1787.444763]  [<ffffffffa0098d39>] drm_ioctl+0x379/0x6a0 [drm]

      [ 1787.444774]  [<ffffffffa00a7e60>] ? drm_mode_setplane+0x1d0/0x1d0 [drm]

      [ 1787.444777]  [<ffffffff811f1e85>] do_vfs_ioctl+0x2e5/0x4c0

      [ 1787.444780]  [<ffffffff8128bbfe>] ? file_has_perm+0xae/0xc0

      [ 1787.444783]  [<ffffffff81640d01>] ? __do_page_fault+0xb1/0x450

      [ 1787.444785]  [<ffffffff811f2101>] SyS_ioctl+0xa1/0xc0

      [ 1787.444788]  [<ffffffff816458c9>] system_call_fastpath+0x16/0x1b

      [ 1787.444789] ---[ end trace d12991de512304b2 ]---

      [ 1787.444790] ------------[ cut here ]------------

      [ 1787.444806] WARNING: at drivers/gpu/drm/i915/intel_dp.c:140 intel_dp_max_link_bw.isra.7+0x31/0x60 [i915]()

      [ 1787.444808] invalid max DP link bw val 0, using 1.62Gbps

      [ 1787.444808] Modules linked in: tcp_lp fuse xt_CHECKSUM xt_addrtype tun drbg ansi_cprng ccm ipt_MASQUERADE nf_nat_masquerade_ipv4 ip6t_rpfilter ip6t_REJECT ipt_REJECT xt_conntrack 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 vfat fat dm_cache_smq dm_cache_mq dm_cache dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio arc4 intel_powerclamp coretemp intel_rapl kvm_intel iTCO_wdt iTCO_vendor_support kvm crc32_pclmul ghash_clmulni_intel snd_hda_codec_hdmi iwlmvm mac80211 snd_hda_codec_realtek snd_hda_codec_generic

      [ 1787.444829]  aesni_intel lrw uvcvideo gf128mul glue_helper ablk_helper snd_hda_intel cryptd videobuf2_vmalloc videobuf2_memops videobuf2_core snd_hda_codec snd_usb_audio snd_usbmidi_lib videodev snd_hda_core snd_hwdep snd_rawmidi sg iwlwifi snd_seq snd_seq_device pcspkr cfg80211 btusb snd_pcm bluetooth rfkill mei_me snd_timer mei lpc_ich snd mfd_core i2c_i801 shpchp soundcore nuvoton_cir rc_core acpi_pad nfsd nfs_acl lockd auth_rpcgss grace sunrpc ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic usb_storage i915 crct10dif_pclmul crct10dif_common crc32c_intel ahci libahci serio_raw i2c_algo_bit libata drm_kms_helper e1000e drm ptp pps_core sdhci_acpi sdhci mmc_core video i2c_hid i2c_core dm_mirror dm_region_hash dm_log dm_mod

      [ 1787.444854] CPU: 0 PID: 7503 Comm: Xorg Tainted: G        W      ------------   3.10.0-327.3.1.el7.x86_64 #1

      [ 1787.444856] Hardware name: \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff \xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff\xffffffff/NUC5i5RYB, BIOS RYBDWi35.86A.0137.2015.0107.1700 01/07/2015

      [ 1787.444857]  ffff88040361ba18 00000000a4f7636a ffff88040361b9d0 ffffffff8163516c

      [ 1787.444858]  ffff88040361ba08 ffffffff8107b200 ffff8804026f1000 0000000000000000

      [ 1787.444860]  ffffffffa02960e8 ffff88040361bb08 0000000000000004 ffff88040361ba70

      [ 1787.444862] Call Trace:

      [ 1787.444865]  [<ffffffff8163516c>] dump_stack+0x19/0x1b

      [ 1787.444867]  [<ffffffff8107b200>] warn_slowpath_common+0x70/0xb0

      [ 1787.444871]  [<ffffffff8107b29c>] warn_slowpath_fmt+0x5c/0x80

      [ 1787.444875]  [<ffffffff8162ebfc>] ? printk+0x77/0x8e

      [ 1787.444891]  [<ffffffffa0268291>] intel_dp_max_link_bw.isra.7+0x31/0x60 [i915]

      [ 1787.444908]  [<ffffffffa0269a1b>] intel_dp_common_rates+0x4b/0x100 [i915]

      [ 1787.444940]  [<ffffffffa026a09a>] intel_dp_compute_config+0xca/0x800 [i915]

      [ 1787.444964]  [<ffffffffa0263bb9>] intel_ddi_compute_config+0x49/0x90 [i915]

      [ 1787.444985]  [<ffffffffa024922a>] intel_modeset_compute_config+0x7ea/0x1060 [i915]

      [ 1787.444996]  [<ffffffffa00f4aa3>] ? drm_atomic_helper_connector_duplicate_state+0x33/0x80 [drm_kms_helper]

      [ 1787.445016]  [<ffffffffa024f504>] intel_crtc_set_config+0x9a4/0xff0 [i915]

      [ 1787.445035]  [<ffffffffa00a3db7>] drm_mode_set_config_internal+0x67/0x100 [drm]

      [ 1787.445051]  [<ffffffffa00a7f4c>] drm_mode_setcrtc+0xec/0x650 [drm]

      [ 1787.445066]  [<ffffffffa0098d39>] drm_ioctl+0x379/0x6a0 [drm]

      [ 1787.445079]  [<ffffffffa00a7e60>] ? drm_mode_setplane+0x1d0/0x1d0 [drm]

      [ 1787.445084]  [<ffffffff811f1e85>] do_vfs_ioctl+0x2e5/0x4c0

      [ 1787.445088]  [<ffffffff8128bbfe>] ? file_has_perm+0xae/0xc0

      [ 1787.445091]  [<ffffffff81640d01>] ? __do_page_fault+0xb1/0x450

      [ 1787.445095]  [<ffffffff811f2101>] SyS_ioctl+0xa1/0xc0

      [ 1787.445099]  [<ffffffff816458c9>] system_call_fastpath+0x16/0x1b

      [ 1787.445102] ---[ end trace d12991de512304b3 ]---

       

      and often i got:

       

      Dec 13 14:35:49 chet kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

      Dec 13 14:35:49 chet kernel: [drm:intel_dp_complete_link_train [i915]] *ERROR* failed to train DP, aborting

       

      and monitor is reset (one or more times).

       

      Steps to Reproduce:
      -------------------------------
      1. Install  CentoOS 7.2.1511 on a NUC5i5RYH
      2. Plug a 4k monitor via DP port (DP 1.2)
      3. Wait a few minutes (if "lucky" you'll get a trace during system boot)

      Expected Results:
      -------------------------------
      No trace and card/monitor not crashing/

      Actual Results:

      -------------------------------

      Monitor being reset and sometime X session bails out

      Do not hesitate to contact me in case of further inquiry.

      Thanks for any insight,

      -m