[Bug 94251] New: Warning and trace when X awakes from Blank/Standby/Suspend/Off

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=94251

            Bug ID: 94251
           Summary: Warning and trace when X awakes from
                    Blank/Standby/Suspend/Off
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.15-rc1
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: wjfgb at mypostoffice.co.uk
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 168911
  --> https://bugzilla.kernel.org/attachment.cgi?id=168911&action=edit
dmesg output produced by wake up after "xset dpms 5 0 0" (kernel 4.0-rc2).

Under kernel 3.15-rc1 onwards get a warning and trace in syslog when X
awakes from Blank/Standby/Suspend/Off. No other adverse effects are
apparent.

Was last OK under kernel 3.14.34.

This bug is raised in response to BUG ID 91241 comment 10.

------------------------------------
Hardware:
  Asus P7H55-M SI with Intel Core i5 processor
  and Integrated Graphics [i915 driver].
  The board has 3 physical graphics connectors :-
    VGA    = VGA1
    DVI-D  = HDMI1 in use.
    HDMI   = HDMI2

Distro: Slackware-14.1, but with latest kernel.

X: xorg-server-1.14.3-x86_64-3_slack14.1
   xorg-server-xvfb-1.14.3-x86_64-3_slack14.1

Window manager: icewm-1.3.8 (also get similar results with twm, wmaker)
------------------------------------

See attached dmesg output produced by wake up after "xset dpms 5 0 0",
running kernel 4.0-rc2.

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