[Bug 86377] New: Blank screen at 3840x2160 resolution (both framebuffer and Xorg)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86377

            Bug ID: 86377
           Summary: Blank screen at 3840x2160 resolution (both framebuffer
                    and Xorg)
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: brian.campbell at editshare.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 109593
  --> https://bugs.freedesktop.org/attachment.cgi?id=109593&action=edit
Output of journalctl

I tried installing Debian Jessie to an Intel NUC D5425WYK (BIOS version
WYLPT10H.86A.0026.2014.0514.1714), attached to a Lenovo LI2821 3840x2160
monitor via DisplayPort. The installer shows up fine, GRUB shows up fine, and
the early console shows up fine to prompt me to enter my disk encryption
password, all at a lower resolution than native. But once we get far enough in
to try modesetting to the full native resolution, the display goes black.
Neither virtual terminals on the framebuffer nor Xorg show up.

After playing around with it a bit, I discovered that I could get lower
resolutions, such as 1920x1080, to work as long as I increased the BIOS
reserved video RAM to the maximum amount (I haven't yet tried bisecting the
amount to see where the cutoff is; it was at the minimum value at first, I
changed it to the max and it worked). But in order to get any output at all, I
had to manually run "xrandr --output DP1 --mode 1920x1080", and manually set
the "video=1920x1080 at 60" boot parameter in order to get the virtual terminals
to show up.

The relevant error in the logs appears to be the following; this happens
whenever I have one of X or the framebuffer set to a lower resolution (which
works), and switch to the native 3840x2160 display resolution:

Nov 17 02:57:49 scratch kernel: [drm:ivybridge_set_fifo_underrun_reporting]
*ERROR* uncleared fifo underrun on pipe A
Nov 17 02:57:49 scratch kernel: [drm:ivb_err_int_handler] *ERROR* Pipe A FIFO
underrun

Distro: Debian Jessie
Motherboard: D54250WYK
CPU: Intel Core i5-4250U
Chipset: Haswell-ULT/HD 5000 (not sure what the actual name is, Haswell-ULT is
what lspci report, HD 5000 is what the spec sheet reports)
Display Connector: DisplayPort (DP1)

$ uname -a
Linux scratch 3.16.0-4-amd64 #1 SMP Debian 3.16.7-2 (2014-11-06) x86_64
GNU/Linux

Reproduce steps: 100% reproducible. Boot. Screen is black until SSHing in and
running "xrandr --output DP1 --mode 1920x1080", or setting GRUB command line to
include "video=1920x1080 at 60" and switching to a virtual terminal.

Various relevant package versions:

ii  libdrm-intel1:amd64          2.4.58-2       amd64        Userspace
interface to intel-specific kernel DRM services -- runtime
ii  libegl1-mesa:amd64           10.3.2-1       amd64        free
implementation of the EGL API -- runtime
ii  libegl1-mesa-drivers:amd64   10.3.2-1       amd64        free
implementation of the EGL API -- hardware drivers
ii  libgl1-mesa-dri:amd64        10.3.2-1       amd64        free
implementation of the OpenGL API -- DRI modules
ii  libgl1-mesa-glx:amd64        10.3.2-1       amd64        free
implementation of the OpenGL API -- GLX runtime
ii  libglapi-mesa:amd64          10.3.2-1       amd64        free
implementation of the GL API -- shared library
ii  libglu1-mesa:amd64           9.0.0-2        amd64        Mesa OpenGL
utility library (GLU)
ii  libopenvg1-mesa:amd64        10.3.2-1       amd64        free
implementation of the OpenVG API -- runtime
ii  libwayland-egl1-mesa:amd64   10.3.2-1       amd64        implementation of
the Wayland EGL platform -- runtime
ii  mesa-utils                   8.2.0-1        amd64        Miscellaneous Mesa
GL utilities
ii  xorg                         1:7.7+7        amd64        X.Org X Window
System
ii  xserver-xorg-video-intel     2:2.21.15-2+b2 amd64        X.Org X server --
Intel i8xx, i9xx display driver

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