X crashed after a reboot.. no X now

[mike]

this was fine for a while.. out of the box mint 16 was buggy with my video card on this brand new laptop.
its a lenovo E545 with a Radeon HD 8450G video card.
so i installed Linux_AMD_Catalyst_14.3_Beta_V1.0_B22_March12_2014.zip and it was fine.. up until now.
i rebooted my laptop and X never came up.. ive uninstalled the amd stuff and i can get X back but its tearing the screen and very unusable, like it was the day i got it.. if I reinstall AMD stuff, I get the spash screen back but when I go to log in it just sits at a blank screen with the loading icon spinning.

00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Richland [Radeon HD 8450G]

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Fri Apr 3 19:05:15 2015
InstallationDate: Installed on 2014-03-23 (376 days ago)
InstallationMedia: Linux Mint 16 "petra" - Release amd64 20131126
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)

[mike (jronpaul)]

lshw -c display
  *-display
       description: VGA compatible controller
       product: Richland [Radeon HD 8450G]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 1
       bus info: pci@0000:00:01.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=fglrx_pci latency=0
       resources: irq:17 memory:e0000000-efffffff ioport:3000(size=256) memory:f0300000-f033ffff

[mike (jronpaul)]

figured out how to get my display working.. not sure if you can find out what caused the problem.
i had to installed the standard fglrx from the package manager..
then ran driver-manager and selected fglrx