Public bug reported:

I have a dual boot system running with Windows7 and Ubuntu LTS 16.04.
The first attempt to boot into ubuntu every time ends up with a boot
loop with a colored magenta blank screen. After rebooting and then
entering ubuntu as OS choice, an error about an "Intel pch overrun
error" (error not mentioned exactly as displayed because I dont
understand the error category or content) is shown but eventually after
sometime ubuntu boots up normally.

The next time when the system boots up, the above process have to be
repeated.

I am not very educated in Linux operations or grub operations but can
understand and implement changes if guided.

Also, Ubuntu taking unusually long time to boot up. Is it bcoz I have
quite a few applications installed? But I don't have much startup
applications set up? Please advice.

This is the first time I am reporting a bug and pardon me for using
xdiagnose for this (if I should not have used it). I don't know what bug
or bugs is/are shown by xdiagnose either.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35
Uname: Linux 4.4.0-57-generic x86_64
.tmp.unity_support_test.0:
 
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Thu Jan  5 03:41:24 2017
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller 
[8086:0152] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Xeon E3-1200 v2/3rd Gen Core processor 
Graphics Controller [1043:844d]
InstallationDate: Installed on 2016-12-17 (18 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Lsusb:
 Bus 002 Device 003: ID 0ac8:3450 Z-Star Microelectronics Corp. 
 Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: System manufacturer System Product Name
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-57-generic 
root=UUID=dc488953-1b39-46a7-b2b1-c8b099adee06 ro quiet splash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/25/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1107
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8H61-M LX3 R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1107:bd02/25/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H61-MLX3R2.0:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20160325-1ubuntu1.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Thu Jan  5 03:26:27 2017
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                2790 
 vendor                                     SAM
xserver.version: 2:1.18.4-0ubuntu0.2

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 ubuntu xenial

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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1654093

Title:
  boot loop

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