I have an Acer 7750G laptop with Ati Radeon HD 6650M graphics. Over the past few weeks I've been trying to enable accelerated graphics. Here is a report on my progress. Right now the internal LCD (LVDS) and VGA are working, HDMI is not.
First, I added the 6650M id to ati.c in chameleon (0x6741) and recompiled, using instructions from notshy.
Adding ATI card IDs to ATI.c
I placed the recompiled boot file on my EFI (boot) partition. This allowed me to boot with GraphicsEnabler=Yes, and to choose a framebuffer using AtiConfig=x, where x is the framebuffer name. None of the 6000 level framebuffers worked for the LVDS, but at least two including Cattail and Fanwort did work for HDMI with acceleration.
Using information from bbc9 and mucha,
I edited the Cattail framebuffer using information from the video bios dump. I still couldn't get a working LVDS. Then are found this topic by k540kkk on using Ipomoea on a 6470M.
Using Ipomoea on 6470M
So using this as guide, I entered by own senseid and k640kkk's information into Ipomoea, and and rebooted. Now I'm getting a full screen accelerated image on my internal LCD, and VGA seems to be working. To make this work for you, add the boot file below to your boot partition, edit ATI6000Controller.kext using the information below and boot with the flags "GraphicsEnabler=Yes" and AtiConfig=Ipomoea. Any thoughts or comments are appreciated.
Personality: Ipomoea ConnectorInfo count in decimal: 3 Disk offset in decimal 531240 0000000: 02 00 00 00 40 00 00 00 29 01 00 00 20 01 01 03 0000010: 00 08 00 00 04 02 00 00 00 01 00 00 21 03 03 01 0000020: 10 00 00 00 10 00 00 00 00 01 00 00 00 00 01 05
ATOM BIOS Rom: SubsystemVendorID: 0x1025 SubsystemID: 0x050e IOBaseAddress: 0x3000 Filename: BR039370.007 BIOS Bootup Message: Acer / Compal JE70_HR Whistler Pro DDR3 128Mx16 600E/800M PCI ID: 1002:6741 Connector at index 0 Type [@offset 44838]: LVDS (7) Encoder [@offset 44842]: INTERNAL_UNIPHY (0x1e) i2cid [@offset 44912]: 0x92, OSX senseid: 0x3 Connector at index 1 Type [@offset 44848]: HDMI-A (11) Encoder [@offset 44852]: INTERNAL_UNIPHY1 (0x20) i2cid [@offset 44935]: 0x90, OSX senseid: 0x1 Connector at index 2 Type [@offset 44858]: VGA (1) Encoder [@offset 44862]: INTERNAL_KLDSCP_DAC1 (0x15) i2cid [@offset 44962]: 0x94, OSX senseid: 0x5