Comment 9 for bug 1577099

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