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I have installed ubuntu 12.04 on my system. But screen of the system is running very slow. I checked the cpu utilization but it is normal less than 15%. Here is specifications

vga kernel driver

 command used *lspci -nnk | grep -i vga -A3*
           00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
Subsystem: Intel Corporation Device [8086:2044]
Kernel driver in use: i915
Kernel modules: i915

sudo hdparm -Tt /dev/sda

 Timing cached reads:   8588 MB in  2.00 seconds = 4296.35 MB/sec
 Timing buffered disk reads: 1090 MB in  3.00 seconds = 363.26 MB/sec

How can I resolve this issue let me know if any thing needed.

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Have you done a full system update? apt-get update; apt-get dist-upgrade. Also you might like to consider upgrading to Ubuntu 14.04 - it has newer Intel drivers than 12.04. –  bain May 23 '14 at 12:05
I have another system with same configuration but it works fine. –  user2622247 May 23 '14 at 12:10
Have you checked /var/log/kern.log and /var/log/syslog for any errors or warnings? Is your other system also using Intel Ivy Bridge graphics? –  bain May 23 '14 at 12:17
yes my another system also using intel Ivy Bridge graphics also checked kern.log it is same –  user2622247 May 23 '14 at 12:34
Other functionality is working fine. It just screen that has the issue. –  user2622247 May 23 '14 at 12:38

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