Welcome, riskyprocedure!
I have a notebook with an i7 Haswell that uses HD 4600 (see this older thread.
Currently, the intel_extreme driver is broken for some hardware, mine included. I have to blacklist it to be able to boot. That falls back to VESA, which isn’t a problem at all, though. It’s probably just as fast as when using the intel_extreme driver, because there’s no acceleration in Haiku’s drivers anyway.
One thing when using VESA is that you’re limited to the resolutions provided by the BIOS. This may be a problem, depending on your specific hardware. It does work very well for me…
Seeing how widely used the onboard intel graphics are, chances are not too bad that the driver will be fixed for more hardware. I’ll take my notebook with me to BeGeistert 030 to have PulkoMandy have a look at it, if he has the time. He and kallisti are the two devs currently most involved with the intel_extreme driver.
Regards,
Humdinger