Same here, didn't occured before with 14.04, started immediatly with
Xenial 16.04 fresh install
>From the syslog :
May 11 18:29:10 hecatonchires kernel: [ 1.130925]
[drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo
underrun on pch transcoder A
May 11 18:29:10 hecatonchires kernel: [ 1.130974]
[drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH transcoder A FIFO
underrun
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04 LTS"
$ uname -r -v -s
Linux 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC 2016
$ sudo lspci -v -s 02.0
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen
Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: ASUSTeK Computer Inc. P8 series motherboard
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [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
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https://bugs.launchpad.net/bugs/1577099
Title:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A
FIFO underrun
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