[Bug 93055] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93055

Daniel Schwemmlein <daniel.schwemmlein at icloud.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|Other                       |x86-64 (AMD64)
                URL|                            |https://forums.opensuse.org
                   |                            |/showthread.php/502115
                 OS|All                         |Linux (All)

--- Comment #9 from Daniel Schwemmlein <daniel.schwemmlein at icloud.com> ---
Software: OpenSuse 42.1

uname -a: Linux 4.1.36-41-default #1 SMP PREEMPT Fri Dec 9 08:26:33 UTC 2016
(29aafea) x86_64 x86_64 x86_64 GNU/Linux

Machine: Lenovo Ideapad P500

Graphic card details:

# lspci -vnn | grep VGA -A 12
00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core
processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA
controller])
        Subsystem: Lenovo Device [17aa:3904]
        Flags: bus master, fast devsel, latency 0, IRQ 26
        Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
        Memory at c0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 3000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [a4] PCI Advanced Features
        Kernel driver in use: i915
        Kernel modules: i915

Error: 

[ 7907.580147] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[ 7907.580182] [drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO
underrun.

Details: The Error occurs at every boot but machine eventually still works.
Just takes a minute or so, the error disappears and device works normally
afterwards.

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