Gurjeet, thank you for reporting this and helping make Ubuntu better.
Please advise to all of the following:

1) To clarify, after you get a purple blank screen when putting in
credentials, does it ever get to the desktop environment?

2) Which desktop environments have you tried to log into where this
happens? For example, Ubuntu (Wayland), Unity, etc.

3) Is this something that started to happen after an update? If so,
which and when precisely?

4) After the issue occurs, are there files in the /var/crash folder?

** Tags added: bios-outdated-1.7.0

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

** Changed in: xorg (Ubuntu)
       Status: New => Incomplete

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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1771628

Title:
  Grpahic Drivers

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  I'm getting a purple blank screen after putting my creadentials when
  the computer is starting.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: xorg 1:7.7+19ubuntu7
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  .tmp.unity_support_test.0:
   
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Wed May 16 19:05:08 2018
  DistUpgraded: 2018-05-16 16:54:13,314 DEBUG icon theme changed, re-reading
  DistroCodename: bionic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation HD Graphics 520 [8086:1916] (rev 07) (prog-if 00 [VGA 
controller])
     Subsystem: Dell Skylake GT2 [HD Graphics 520] [1028:0704]
  InstallationDate: Installed on 2016-11-01 (560 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0c45:670c Microdia 
   Bus 001 Device 002: ID 0a5c:6412 Broadcom Corp. 
   Bus 001 Device 004: ID 0781:5567 SanDisk Corp. Cruzer Blade
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 9350
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic 
root=UUID=247af43d-40d7-48c1-8502-e54796f36b07 ro quiet splash vt.handoff=1
  SourcePackage: xorg
  UpgradeStatus: Upgraded to bionic on 2018-05-16 (0 days ago)
  dmi.bios.date: 06/14/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.4.4
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.4.4:bd06/14/2016:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9350
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1
  version.libdrm2: libdrm2 2.4.91-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

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