- Which version of Lightroom are you using?
- What is your operating system?
- Try un-checking the option "Use Graphics Processor" under Preferences>>Performance (Edit>>Preferences in Windows OS).Also see Adobe Photoshop Lightroom Help | Lightroom Graphics Processor Acceleration (GPU) Troubleshooting & FAQ
Please make sure your system meets minimum requirements for Lightroom System requirements for Adobe Lightroom for Mac and Windows OS
You can further of Lightroom following this article Optimize performance
Akash, Instead of telling people again and again to turn off the 'Use Graphics Processor', why doesn't Adobe turn it off as default? Then just the people who need it for large monitors can turn it on - at their peril!! One day it might work for all, but at the moment it clearly doesn't.
Given that Adobe has email addresses for pretty much all of us, it strikes me that they should be using them to push out a one-hit communicaiton covering all of these workarounds, problems with El Capitan and whatnot, even if they don't take up your suggestion, Bob.