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HP DV6-7023tx Enable HD4000

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My Laptop is HP DV6-7023tx specifications are below My problem is I cannot enable HD4000 I have to give boot arg Graphicsenabler=No and IGPenabler=Yes unless the screen is going dark.Can enyone please help me? thanks in advance. I'm very sorry for my bad English. Im a Sri Lankan.

Specs:

Microprocessor 2.3 GHz Intel Core i7-3610QM Microprocessor Cache 6 MB L3 Cache Memory 16 GB 1366 MHz DDR3 Memory Max 2 user accessible slots Video Graphics NVIDIA GeForce GT 630M Video Memory 2 GB DDR3 dedicated Hard Drive 750 GB SATA (5400 rpm) Multimedia Drive Blu ray Drive Display 15.6" diagonal HD BrightView LED-backlit Display (1366 x 768) Network Card Integrated 10/100/1000 Gigabit Ethernet LAN (RJ-45 connector) Wireless Connectivity 802.11b/g/n 

Bluetooth Sound 4 x Beats Audio Internal speakers

Beats Audio Audio playback

HP Triple Bass Reflex Subwoofer Keyboard Full-sized island-style keyboard with integrated numeric keypad Pointing Device TouchPad with on/off button and support for multitouch gestures PC Card Slots
  • Multi-Format Digital Media Card Reader for Secure Digital cards & Multimedia cards
External Ports
  • 3 SuperSpeed USB 3.0
  • 1 USB 2.0
  • 1 HDMI
  • 1 VGA
  • 1 RJ45
  • 1 Headphone-out
  • 1 Microphone-in
Dimensions 37.8 x 24.7 x 3.25 cm Weight Starting at 2.57 kg Security HP SimplePass Fingerprint Reader

Kensington MicroSaver lock slot

Power-on password

Accepts 3rd party security lock devices Power
  • 120W slim AC Power Adapter
  • 6-cell Lithium-Ion (Li-Ion)
ID Mech Description HP TrueVision HD Webcam with integrated dual array digital microphone (High Definition low-light)

Im attaching dsdt file that extarted from AIDA64 in windows 7

acpi_dsdt.rar

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