Bug 1286561 - "[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun" on boot
"[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO und...
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-intel (Show other bugs)
x86_64 Linux
unspecified Severity unspecified
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Assigned To: Adam Jackson
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-11-30 04:09 EST by David Tonhofer
Modified: 2016-07-19 14:32 EDT (History)
9 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-07-19 14:32:54 EDT
Type: Bug
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Description David Tonhofer 2015-11-30 04:09:47 EST
Description of problem

Booting my olde laptoppe (a Fujitsu-Siemens Amilo Xi 3650) running:

4.2.6-200.fc22.x86_64 KDE

the following can be found in the kernel log after the network has come up:

Adjusting hpet more than 11% (2074996363 vs 2601267907)
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun

Sometimes it is just "pipe A FIFO" which underruns.

Is this a problem? Maybe:

I noticed that the KDE boot screen (the one with the cogwheel shown before the login prompt appears) takes a LONG time to finish after this message appears.

Today the boot didn't finish at all and I had to reboot from the text console.

But maybe it's just the hardware getting flaky.

Version-Release number of selected component (if applicable):

4.2.6-200.fc22.x86_64 KDE

01:00.0 VGA compatible controller: NVIDIA Corporation G96M [GeForce 9600M GT] (rev a1)

How reproducible:

Every boot.

Since September when I installed Fedora 22.
Comment 1 Fedora End Of Life 2016-07-19 14:32:54 EDT
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this

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