Fikrul Arif, thank you for reporting this and helping make Ubuntu better.
Raring reached EOL on January 27, 2014.
See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases
Is this an issue on a supported release?
** Changed in: xorg (Ubuntu)
Importance: Undecided => Low
** Changed in: xorg (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1272242
Title:
Hybrid graphics: switching to discrete by using switcheroo make screen
going black
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