[Bug 88159] New: [BSW] Screen stays off when resuming from a suspend to RAM

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88159

            Bug ID: 88159
           Summary: [BSW] Screen stays off when resuming from a suspend to
                    RAM
           Product: DRI
           Version: XOrg git
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: christophe.prigent at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 111914
  --> https://bugs.freedesktop.org/attachment.cgi?id=111914&action=edit
acpi dump

Platform: Braswell M
CPU : Intel(R) CPU @ 1.36GHz (family: 6, model: 76 stepping: 2)
SoC : BSW B1
CRB : BRASWELL RVP Fab2
Mandatory Reworks
Software
Linux distribution: Ubuntu 14.04 LTS 64 bits
Kernel:
3.19-rc1 from mwesterb-linux, head= braswell,
git://git-amr-4.devtools.intel.com/mwesterb-linux.git
or
3.19-rc2 from git-amr-2.devtools.intel.com otc_eywa-linux-eywa
BIOS: BRASWEL1.X64.0052.R00.1412261152
TXE FW: 2.0.0.2042
Ksc: 1.06

Pre-conditions:
-------------------
Use any computer/device to remotely access to the DUT
Check DUT IP adress

Steps:
----------
1. Execute command as root:
echo mem > /sys/power/state
2. Wait 60 seconds
3. Resume with power button
4. Wait a moment

Actual result:
---------------
4. DUT is resumed (ssh works) but screen is off

Expected result:
---------------------
4. DUT resumes with screen on

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