mbp8.2 (amd radeon hd6750m / intel hd3000)
on bootup, the apple logo shows in something like 640x480 4x3 resolution.. when i gets to the login, it switches back to its proper default resolution.
i've had this before on this machine, even worse, the resolution had to be changed manually.
so I upgraded from SL to ML and it disappeared for a while. now it's back after connecting the notebook to a vga - beamer....
resetting the nvram (opt-cmd-p-r) on bootup does the trick but the problem keeps returning.
any ideas what could cause that and how to get rid of it?
on bootup, the apple logo shows in something like 640x480 4x3 resolution.. when i gets to the login, it switches back to its proper default resolution.
i've had this before on this machine, even worse, the resolution had to be changed manually.
so I upgraded from SL to ML and it disappeared for a while. now it's back after connecting the notebook to a vga - beamer....
resetting the nvram (opt-cmd-p-r) on bootup does the trick but the problem keeps returning.
any ideas what could cause that and how to get rid of it?