Problem and solution installing Fedora 17 on HP Z220 CMT

System Specifications:

Processor: Intel Core i5-3470
Chipset: Intel C216 chipset
RAM: 2x4GB DDR3 @ 1600MHz
HDD: 500GB SATA 3.0 @ 7200RPM


I tried installing Fedora 17 on above mentioned workstation having Intel HD Graphics 2500.Meanwhile I faced following two issues:
During installation steps upto creation of partition,the screen was not 
clear. Screen was blurring, and all the pixels became such zoom that I was  unable to read anything about the partition and other stuff (right from 
beginning.Though I managed to install fedora 17 by looking into the snapshots of fedora installation steps over internet.
Main issues is here: After installation of Fedora 17,when I restarted, it 
booted up & just before the login screen the screen goes dark, with some 
random blue-pixels at the top (sometimes with a message, like "oh! somethingwent wrong..... unrecoverable!").

Aim: appending 'nomodeset' in kernel option /etc/default/grub file
steps:1)After Installation of fedora, reboot.
2)Point Fedora 17 in grub menu, and press 'E', it will display a window     titling "GNU GRUB version 2.00~beta4"
3)go to the line that starts with 

"linux  /boot/vmlinuz-3.3.4-5......UTF-8 rhgb quiet.."

4)erase everything after UTF-8(i.e. rhgb...) and write 3 there.
After that line should look like

linux  /boot/vmlinuz-3.3.4-5......UTF-8  3

5)press f10,you would be redirected to text-console(rather GUI).
6)login there with your user name and password.
7)open the file /etc/default/grub and append in the last 
"nomodeset" in GRUB_CMDLINE_LINUX, after appending it would 
look like:

GRUB_CMDLINE_LINUX=" rd.lvm=0 SYSFONT=True rd.luks=0 LANG=es_ES.UTF-8  KEYTABLE=es rhgb quiet nomodeset"

(append only nomodeset in last, dont modify other parameters)
8)save the file, and run this command

>grub2-mkconfig -o /boot/grub2/grub.cfg

9)reboot, now graphics should work smooth.

If you found any problem during these steps, please comment here.