[Bug 90307] New: [IVB] at boot all displays cycled on/off over and over ERROR CPU pipe B FIFO underrun

Mon May 4 14:13:46 PDT 2015

https://bugs.freedesktop.org/show_bug.cgi?id=90307

            Bug ID: 90307
           Summary: [IVB] at boot all displays cycled on/off over and over
                    *ERROR* CPU pipe B FIFO underrun
           Product: DRI
           Version: DRI git
          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: chris.bainbridge at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Using linux git 6c3c1eb (May 1st)
Macbook with 3 monitors

Booting is normally fine, but on one boot no displays came on, instead every
display, including the internal laptop display, seemed to be cycling on and off
rapidly. Odd.

[    7.309929] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[    7.309935] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[    7.309950] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[    7.309953] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[    8.357580] ax88179_178a 1-3.3.4.1:1.0 eth0: ax88179 - Link status is: 1
[    8.386869] random: nonblocking pool is initialized
[    9.575978] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[    9.733064] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[    9.733070] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[    9.733079] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[    9.733082] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   12.166051] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   12.303010] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   12.303017] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   12.303025] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   12.303027] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   14.771931] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   14.908020] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   14.908027] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   14.908037] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   14.908039] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   17.361970] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   17.502117] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   17.502124] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   17.502133] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   17.502134] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   19.968054] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   20.102951] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   20.102957] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   20.102966] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   20.102968] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   22.558021] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   22.692150] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   22.692157] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   22.692166] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   22.692167] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   25.164746] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   25.300187] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   25.300194] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   25.300203] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   25.300205] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   27.773187] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   27.910214] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   27.910220] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   27.910227] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   27.910229] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   30.362202] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   30.504276] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   30.504295] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   30.504304] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   30.504306] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   32.970648] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   33.105024] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   33.105030] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   33.105039] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   33.105041] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   35.577461] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   35.718331] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   35.718337] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   35.718345] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   35.718347] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   38.151096] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   38.286267] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   38.286273] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   38.286382] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B
[   38.286386] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
B FIFO underrun
[   40.775336] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder C
[   40.912389] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe B
[   40.912396] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B
FIFO underrun
[   40.912407] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder B

The rest of dmesg just shows those errors repeating until I turned off the
laptop 5 minutes later.

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[Bug 90307] New: [IVB] at boot all displays cycled on/off over and over *ERROR* CPU pipe B FIFO underrun

[Bug 90307] New: [IVB] at boot all displays cycled on/off over and over ERROR CPU pipe B FIFO underrun