[Bug 104158] New: Blank screen since 4.14.4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104158

            Bug ID: 104158
           Summary: Blank screen since 4.14.4
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jrg2718 at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org
     i915 platform: CFL

On kernel 4.14.4 and 4.15-rc2, the screen goes blank during boot

On 4.14.3, there are other issues that may be related:

- when X is started up first, only the cursor is shown and the WM only appears
after switching to another TTY and back

- when the display went to sleep, it usually only comes back by switching to a
TTY and back as well

- screen corruption on URXVT and on Termite

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