[Bug 98567] [SKL]Black screen : no signal from computer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98567

--- Comment #2 from martin.souchal at gmail.com ---
It's still valid with Linux 4.9.0-1-drm-intel-nightly #1 SMP PREEMPT Mon Dec 5
12:56:56 CET 2016 x86_64 GNU/Linux

Error in dmesg :

[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun

and before :

[    3.467590] ------------[ cut here ]------------
[    3.467634] WARNING: CPU: 2 PID: 46 at drivers/gpu/drm/i915/intel_dp.c:4023
intel_dp_check_link_status+0x1d7/0x200 [i915]
[    3.467636] WARN_ON_ONCE(!intel_dp->lane_count)
[    3.467663] Modules linked in: snd_compress snd_pcm_dmaengine ac97_bus
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core
videodev media iTCO_wdt mei_wdt(+) iTCO_vendor_support
i2c_designware_platform(+) i2c_designware_core hp_wmi arc4 tpm_infineon
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm
irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel
aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd intel_cstate
intel_rapl_perf btusb btrtl pcspkr evdev input_leds psmouse mac_hid iwlmvm
snd_hda_intel mac80211 snd_hda_codec e1000e led_class i915 snd_hda_core ptp
snd_hwdep pps_core snd_pcm drm_kms_helper snd_timer snd soundcore iwlwifi
i2c_i801 i2c_smbus cfg80211 drm intel_gtt syscopyarea shpchp sysfillrect mei_me
sysimgblt fb_sys_fops
[    3.467684]  i2c_algo_bit idma64 intel_pch_thermal mei intel_lpss_pci
thermal wmi battery i2c_hid hid hci_uart btbcm btqca btintel bluetooth rfkill
pinctrl_sunrisepoint pinctrl_intel intel_lpss_acpi intel_lpss video fjes
hp_wireless intel_hid acpi_pad ac sparse_keymap tpm_tis tpm_tis_core button tpm
sch_fq_codel ip_tables x_tables ext4 crc16 jbd2 mbcache dm_mod sd_mod serio_raw
atkbd libps2 crc32c_intel ahci libahci libata xhci_pci xhci_hcd scsi_mod
usbcore usb_common i8042 serio
[    3.467687] CPU: 2 PID: 46 Comm: kworker/2:1 Tainted: G     U         
4.9.0-1-drm-intel-nightly #1
[    3.467688] Hardware name: HP HP EliteBook Folio 1040 G3/80FA, BIOS N83 Ver.
01.08 09/02/2016
[    3.467693] Workqueue: events output_poll_execute [drm_kms_helper]
[    3.467696]  ffffc90000e17b30 ffffffff812f9a70 ffffc90000e17b80
0000000000000000
[    3.467698]  ffffc90000e17b70 ffffffff8107d4db 00000fb700e17ba8
ffff880224d5d0f0
[    3.467700]  0000000000000001 ffff880226338000 ffff880226338258
ffff880224d5d000
[    3.467701] Call Trace:
[    3.467705]  [<ffffffff812f9a70>] dump_stack+0x63/0x83
[    3.467708]  [<ffffffff8107d4db>] __warn+0xcb/0xf0
[    3.467710]  [<ffffffff8107d55f>] warn_slowpath_fmt+0x5f/0x80
[    3.467714]  [<ffffffffa0589467>] ? drm_dp_dpcd_read+0x57/0x70
[drm_kms_helper]
[    3.467751]  [<ffffffffa066f187>] intel_dp_check_link_status+0x1d7/0x200
[i915]
[    3.467783]  [<ffffffffa0675489>] intel_dp_detect+0x6a9/0xa50 [i915]
[    3.467787]  [<ffffffffa058a020>]
drm_helper_probe_single_connector_modes+0x2a0/0x500 [drm_kms_helper]
[    3.467791]  [<ffffffffa059837b>] drm_setup_crtcs+0x7b/0x9b0
[drm_kms_helper]
[    3.467794]  [<ffffffff812fd2ec>] ? kobject_uevent_env+0x14c/0x4f0
[    3.467797]  [<ffffffffa05991c2>] drm_fb_helper_hotplug_event+0xd2/0xf0
[drm_kms_helper]
[    3.467831]  [<ffffffffa0665bc4>] intel_fbdev_output_poll_changed+0x24/0x30
[i915]
[    3.467835]  [<ffffffffa0589a27>] drm_kms_helper_hotplug_event+0x27/0x30
[drm_kms_helper]
[    3.467838]  [<ffffffffa0589c4c>] output_poll_execute+0x1bc/0x200
[drm_kms_helper]
[    3.467841]  [<ffffffff81097245>] process_one_work+0x1e5/0x470
[    3.467843]  [<ffffffff81097518>] worker_thread+0x48/0x4e0
[    3.467845]  [<ffffffff810974d0>] ? process_one_work+0x470/0x470
[    3.467847]  [<ffffffff810974d0>] ? process_one_work+0x470/0x470
[    3.467848]  [<ffffffff8109d0a9>] kthread+0xd9/0xf0
[    3.467851]  [<ffffffff8102d752>] ? __switch_to+0x2d2/0x630
[    3.467853]  [<ffffffff8109cfd0>] ? kthread_park+0x60/0x60
[    3.467855]  [<ffffffff815fd8d5>] ret_from_fork+0x25/0x30
[    3.467856] ---[ end trace 692125c45b30cbcb ]---

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