- Jan 21, 2012
- HP 8300 Elite
- GT 710
- Mobile Phone
Thanks for the explanation.No, we should not change those hex values!
DVMT is being set to 96MB inside the firmware itself (inside BIOS). Those hex bytes are modifying the AppleIntelFrameBufferAzul to enable 4K, but this patch does not affect DVMT Pre-Alloc.
Are you getting 4K output with the original unmodified patch?
Yes, 4k using the original patch, altering it to the new number seemed not to change anything but I did read that that byte was setting the DVMT but can't find the info that showed that.
Do you know; where can you find the info on what the byte in question does?
Or what the issues are with the HD4600? There seem to be a lot of similar reports - black screen/wake issues that are overcome by turning on "allow legacy option roms".
Edit: your reply set off some thoughts and I reverted both of the firmware changes and tried only using the Framebuffer patch- it all works - still not certain if we need to unlock Cfg in uefi firmware to make the change effective - ie will it work without ever making the change (or do you need to make it but can then roll back). Still testing.