After updating to latest OS X Lion 10.7.5 my display is very fuzzy and flickering

My monitor is hooked up to the mac with hdmi cable and to pc with vga cable.  After upgrading the OS X over the weekend my mac display is a mess.  Very blurry and flickering.  Checked all cables, rebooted, etc.  When I switch over to my pc, display is crystal clear, so I know it's not the monitor itself.  I'm not sure if it's a hardware issue with the mac or what.  SHould I take it in for service?  Any other suggestions? 

Reset the Mac's > NVRAM and PRAM
1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

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    com.apple.driver.AppleLPC    1.7.3
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    com.apple.driver.AppleIntelFramebufferCapri    10.0.0
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    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless    1.0.0d1
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    com.apple.driver.XsanFilter    404
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    com.apple.driver.AppleUSBEHCI    705.4.14
    com.apple.driver.AppleUSBXHCI    705.4.14
    com.apple.driver.AppleSmartBatteryManager    161.0.0
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    com.apple.driver.AppleHPET    1.8
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    com.apple.driver.AppleACPIEC    3.1
    com.apple.driver.AppleAPIC    1.7
    com.apple.driver.AppleIntelCPUPowerManagementClient    218.0.0
    com.apple.nke.applicationfirewall    161
    com.apple.security.quarantine    3
    com.apple.security.TMSafetyNet    8
    com.apple.driver.AppleIntelCPUPowerManagement    218.0.0
    com.apple.iokit.IOSerialFamily    11
    com.apple.kext.triggers    1.0
    com.apple.driver.DspFuncLib    267.0
    com.apple.kext.OSvKernDSPLib    1.15
    com.apple.iokit.IOAudioFamily    200.6
    com.apple.vecLib.kext    1.2.0
    com.apple.nvidia.driver.NVDAGK100Hal    10.0.0
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    com.apple.driver.AppleGraphicsControl    3.7.21
    com.apple.driver.X86PlatformPlugin    1.0.0
    com.apple.driver.AppleSMBusController    1.0.13d1
    com.apple.iokit.IOUSBUserClient    705.4.0
    com.apple.driver.AppleSMC    3.1.9
    com.apple.driver.AppleHDAController    267.0
    com.apple.iokit.IOHDAFamily    267.0
    com.apple.driver.AppleSMBusPCI    1.0.12d1
    com.apple.driver.IOPlatformPluginFamily    5.8.0d49
    com.apple.iokit.IOSurface    97
    com.apple.iokit.IONDRVSupport    2.4.1
    com.apple.iokit.IOAcceleratorFamily2    156.4
    com.apple.AppleGraphicsDeviceControl    3.7.21
    com.apple.iokit.IOGraphicsFamily    2.4.1
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    com.apple.driver.AppleUSBMultitouch    245.2
    com.apple.iokit.IOUSBHIDDriver    705.4.0
    com.apple.driver.AppleUSBMergeNub    705.4.0
    com.apple.driver.AppleUSBComposite    705.4.9
    com.apple.driver.CoreStorage    471
    com.apple.driver.AppleThunderboltDPInAdapter    4.0.6
    com.apple.driver.AppleThunderboltDPAdapterFamily    4.0.6
    com.apple.driver.AppleThunderboltPCIDownAdapter    2.0.2
    com.apple.driver.AppleThunderboltNHI    3.1.7
    com.apple.iokit.IOThunderboltFamily    4.2.1
    com.apple.iokit.IO80211Family    700.52
    com.apple.driver.mDNSOffloadUserClient    1.0.1b8
    com.apple.iokit.IONetworkingFamily    3.2
    com.apple.iokit.IOAHCIFamily    2.7.0
    com.apple.iokit.IOUSBFamily    705.4.14
    com.apple.driver.AppleEFINVRAM    2.0
    com.apple.iokit.IOHIDFamily    2.0.0
    com.apple.driver.AppleEFIRuntime    2.0
    com.apple.iokit.IOSMBusFamily    1.1
    com.apple.security.sandbox    300.0
    com.apple.kext.AppleMatch    1.0.0d1
    com.apple.driver.AppleKeyStore    2
    com.apple.driver.AppleMobileFileIntegrity    1.0.5
    com.apple.driver.AppleCredentialManager    1.0
    com.apple.driver.DiskImages    389.1
    com.apple.iokit.IOStorageFamily    2.0
    com.apple.iokit.IOReportFamily    31
    com.apple.driver.AppleFDEKeyStore    28.30
    com.apple.driver.AppleACPIPlatform    3.1
    com.apple.iokit.IOPCIFamily    2.9
    com.apple.iokit.IOACPIFamily    1.4
    com.apple.kec.corecrypto    1.0
    com.apple.kec.Libm    1
    com.apple.kec.pthread    1
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