[Bug 107033] New: Randomly black screen on boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107033

            Bug ID: 107033
           Summary: Randomly black screen on boot
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: bsd4fir at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 140328
  --> https://bugs.freedesktop.org/attachment.cgi?id=140328&action=edit
dmesg fail drm-tip

Hello,

The machine randomly start with black screen (there are park of this machines.
Some of them work OK, some have issue and some have issue more often)
after again reboot it may be Ok or may be fail and start only after 3-th time
some times every restart is ok (10..20 in a row)

System work and I have access over ssh

According to dmesg, the eDP port can not turn on the power and switch to
HDMI-A-2

[    2.418002] [drm:intel_dp_init_panel_power_sequencer_registers [i915]] panel
power sequencer register settings: PP_ON 0x87d00001, PP_OFF 0x1f40001, PP_DIV
0x270f06
[    2.418059] [drm:edp_panel_vdd_on [i915]] Turning eDP port C VDD on
[    2.418114] [drm:edp_panel_vdd_on [i915]] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd000b
[    2.420630] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x70150064
[    2.423130] [drm:intel_dp_aux_xfer [i915]] dp_aux_ch timeout status
0x70150064
...
[    2.498094] [drm:drm_dp_dpcd_access [drm_kms_helper]] Too many retries,
giving up. First error: -110
[    2.498096] [drm] failed to retrieve link info, disabling eDP


-- chipset: Intel(R) Celeron(R) CPU  N3060 
    Gigabyte Technology Co., Ltd. N3060TN-EM
    Intel Corporation Device 22b1 (rev 35) (prog-if 00 [VGA controller])
-- system architecture: x86_64
-- kernel: 4.10 4.16 4.18(drm-tip/2018-06-23)
-- Linux distribution: Ubuntu 16.04
-- Display connector: eDP

cat /sys/class/drm/card0/error - is empty

On normal boot
ls -l /sys/class/drm/card0/
total 0
drwxr-xr-x 5 root root    0 Jun 25 14:07 card0-DP-1
drwxr-xr-x 6 root root    0 Jun 25 14:07 card0-eDP-1
drwxr-xr-x 3 root root    0 Jun 25 14:07 card0-HDMI-A-1
...

On black screen 
ls -l /sys/class/drm/card0/
total 0
drwxr-xr-x 5 root root    0 Jun 25 13:04 card0-DP-1
drwxr-xr-x 3 root root    0 Jun 25 13:04 card0-HDMI-A-1
drwxr-xr-x 3 root root    0 Jun 25 13:04 card0-HDMI-A-2
...

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