[Bug 93512] New: [i915] Display loses signal, intermittently, only when several programs are running

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93512

            Bug ID: 93512
           Summary: [i915] Display loses signal, intermittently, only when
                    several programs are running
           Product: DRI
           Version: unspecified
          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: ireneista at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 120693
  --> https://bugs.freedesktop.org/attachment.cgi?id=120693&action=edit
dmesg

Steps to reproduce:

Boot the computer; log in at the lightdm prompt.  Use the window manager of
your choice, or none.  Possibly observe slight tearing at the desktop, which
was not present at the login prompt.  Open an instance of urxvt.  Open a second
urxvt.  Both windows appear briefly, then within three seconds the screen goes
black.

Watch for a few minutes and observe that the screen spends about five seconds
out of every sixty displaying the desktop, and the remainder of the time black.
 Occasionally the monitor displays a "no signal" message, when the black
periods are sufficiently prolonged.

Happens every time; opening a single instance of Chromium can also be used in
place of the two urxvt instances.

System architecture: x86_64
Kernel version: 4.1.13
Linux distribution: NixOS git head as of 2015-12-05 (also tried unstable as of
2015-12-25, and 15.09 stable, which is dated 2015-12-14).
Machine: Gigabyte Core i3-5010U (GB-BXi3H-5010)
Display connector: HDMI

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