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Hello folks! I've been working on this issue for a few weeks so I guess it's time to ask for your help... My Context I've got an very strange glitch on my laptop built-in display. GLITCH VIDEO: https://docs.google.com/file/d/0B9u_U2zduVk1MzhXVWh6TkdBWm8/view I believe it's not an issue on my graphic card settings since I've got full graphics in a external monitor plugged in my HDMI port. So I guessed that the EDID of built-in monitor is not being grabbed correctly. Even with EDID issues having a different behaviour, I tried overriding the display EDID with EDID grabbed from windows. Also tried FixEDID with no luck. One thing to note is that DarwinDumper output some warnings that may help: EDID block does NOT conform to EDID 1.3! Missing name descriptor Missing monitor ranges Detailed block string not properly terminated My Questions For those with more experience, this really looks like an EDID issue? If not, what else can fix this? An IMEI DSDT Patch?! My Specs Lenovo B490 - i5-3320m - H77M - HD 4000 OS X 10.10.1 Video Ports: Real Ports: 1 LVDS, 1 HDMI, 1 VGA(still disabled) and this model has no MiniDP port Using 0x01660003 1 LVDS, 1 HDMI, 2 DP My config.plist is attached EDID grabbed with DarwinDumper is attached IOReg is attached Specification of the built-in LCD: N140BGE-L22 --------------- Update #1 My conclusion so far is that this monitor has a broken EDID EEPROM. I just need to know how can I build my own EDID based on the monitor specifications... --------------- Update #2 I've also tried to create a EDID from scratch with this very nice tool: http://www.analogway.com/en/products/software-and-tools/aw-edid-editor/ The attached override was under path `/S/L/Displays/Overrides/DisplayVendorID-dae/DisplayProductID-1470`. However it was not loaded (the display name doesn't changed) and I don't know why. I've checked the file permissions and it was identical to the others overrides. --------------- Update #3 So, it's probably not an EDID issue, since the built-in display works properly when QE/CI isn't enabled. Please help... config.plist.txt ioreg.zip DisplayProductID-1470.txt DarwinDumper EDID.txt