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The system must be booted via the EFI stub for this to be usable. efifb supports both firmware with Graphics Output Protocol (GOP) displays as well as older systems with only Universal Graphics Adapter (UGA) displays.”…””}”(hhÍh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubh¶)”}”(hhh]”(h»)”}”(hŒSupported Hardware”h]”hŒSupported Hardware”…””}”(hhÞh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhhÛh²hh³hÊh´K ubhŒ bullet_list”“”)”}”(hhh]”(hŒ list_item”“”)”}”(hŒ iMac 17"/20"”h]”hÌ)”}”(hhõh]”hŒiMac 17â€/20—…””}”(hh÷h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K hhóubah}”(h]”h ]”h"]”h$]”h&]”uh1hñhhîh²hh³hÊh´Nubhò)”}”(hŒMacbook”h]”hÌ)”}”(hj h]”hŒMacbook”…””}”(hjh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj ubah}”(h]”h ]”h"]”h$]”h&]”uh1hñhhîh²hh³hÊh´Nubhò)”}”(hŒMacbook Pro 15"/17"”h]”hÌ)”}”(hj#h]”hŒMacbook Pro 15â€/17—…””}”(hj%h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj!ubah}”(h]”h ]”h"]”h$]”h&]”uh1hñhhîh²hh³hÊh´Nubhò)”}”(hŒMacMini”h]”hÌ)”}”(hj:h]”hŒMacMini”…””}”(hj<h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj8ubah}”(h]”h ]”h"]”h$]”h&]”uh1hñhhîh²hh³hÊh´Nubhò)”}”(hŒ)ARM/ARM64/X86 systems with UEFI firmware ”h]”hÌ)”}”(hŒ(ARM/ARM64/X86 systems with UEFI firmware”h]”hŒ(ARM/ARM64/X86 systems with UEFI firmware”…””}”(hjSh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KhjOubah}”(h]”h ]”h"]”h$]”h&]”uh1hñhhîh²hh³hÊh´Nubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ-”uh1hìh³hÊh´K hhÛh²hubeh}”(h]”Œsupported-hardware”ah ]”h"]”Œsupported hardware”ah$]”h&]”uh1hµhh·h²hh³hÊh´K ubh¶)”}”(hhh]”(h»)”}”(hŒHow to use it?”h]”hŒHow to use it?”…””}”(hjzh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhjwh²hh³hÊh´KubhÌ)”}”(hŒPFor UGA displays, efifb does not have any kind of autodetection of your machine.”h]”hŒPFor UGA displays, efifb does not have any kind of autodetection of your machine.”…””}”(hjˆh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khjwh²hubhÌ)”}”(hŒDYou have to add the following kernel parameters in your elilo.conf::”h]”hŒCYou have to add the following kernel parameters in your elilo.conf:”…””}”(hj–h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khjwh²hubhŒ literal_block”“”)”}”(hŒ°Macbook : video=efifb:macbook MacMini : video=efifb:mini Macbook Pro 15", iMac 17" : video=efifb:i17 Macbook Pro 17", iMac 20" : video=efifb:i20”h]”hŒ°Macbook : video=efifb:macbook MacMini : video=efifb:mini Macbook Pro 15", iMac 17" : video=efifb:i17 Macbook Pro 17", iMac 20" : video=efifb:i20”…””}”hj¦sbah}”(h]”h ]”h"]”h$]”h&]”Œ xml:space”Œpreserve”uh1j¤h³hÊh´Khjwh²hubhÌ)”}”(hŒœFor GOP displays, efifb can autodetect the display's resolution and framebuffer address, so these should work out of the box without any special parameters.”h]”hŒžFor GOP displays, efifb can autodetect the display’s resolution and framebuffer address, so these should work out of the box without any special parameters.”…””}”(hj¶h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K$hjwh²hubhÌ)”}”(hŒAccepted options:”h]”hŒAccepted options:”…””}”(hjÄh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K'hjwh²hubhŒtable”“”)”}”(hhh]”hŒtgroup”“”)”}”(hhh]”(hŒcolspec”“”)”}”(hhh]”h}”(h]”h ]”h"]”h$]”h&]”Œcolwidth”Kuh1jÜhjÙubjÝ)”}”(hhh]”h}”(h]”h ]”h"]”h$]”h&]”Œcolwidth”K;uh1jÜhjÙubhŒtbody”“”)”}”(hhh]”hŒrow”“”)”}”(hhh]”(hŒentry”“”)”}”(hhh]”hÌ)”}”(hŒnowc”h]”hŒnowc”…””}”(hjh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K*hjþubah}”(h]”h ]”h"]”h$]”h&]”uh1jühjùubjý)”}”(hhh]”hÌ)”}”(hŒ¦Don't map the framebuffer write combined. This can be used to workaround side-effects and slowdowns on other CPU cores when large amounts of console data are written.”h]”hŒ¨Don’t map the framebuffer write combined. This can be used to workaround side-effects and slowdowns on other CPU cores when large amounts of console data are written.”…””}”(hjh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K*hjubah}”(h]”h ]”h"]”h$]”h&]”uh1jühjùubeh}”(h]”h ]”h"]”h$]”h&]”uh1j÷hjôubah}”(h]”h ]”h"]”h$]”h&]”uh1jòhjÙubeh}”(h]”h ]”h"]”h$]”h&]”Œcols”Kuh1j×hjÔubah}”(h]”h ]”h"]”h$]”h&]”uh1jÒhjwh²hh³hÊh´NubhÌ)”}”(hŒOptions for GOP displays:”h]”hŒOptions for GOP displays:”…””}”(hjEh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K/hjwh²hubhŒdefinition_list”“”)”}”(hhh]”(hŒdefinition_list_item”“”)”}”(hŒSmode=n The EFI stub will set the mode of the display to mode number n if possible. ”h]”(hŒterm”“”)”}”(hŒmode=n”h]”hŒmode=n”…””}”(hj`h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j^h³hÊh´K3hjZubhŒ definition”“”)”}”(hhh]”hÌ)”}”(hŒKThe EFI stub will set the mode of the display to mode number n if possible.”h]”hŒKThe EFI stub will set the mode of the display to mode number n if possible.”…””}”(hjsh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K2hjpubah}”(h]”h ]”h"]”h$]”h&]”uh1jnhjZubeh}”(h]”h ]”h"]”h$]”h&]”uh1jXh³hÊh´K3hjUubjY)”}”(hXdx[-(rgb|bgr|)] The EFI stub will search for a display mode that matches the specified horizontal and vertical resolution, and optionally bit depth, and set the mode of the display to it if one is found. The bit depth can either "rgb" or "bgr" to match specifically those pixel formats, or a number for a mode with matching bits per pixel. ”h]”(j_)”}”(hŒx[-(rgb|bgr|)]”h]”hŒx[-(rgb|bgr|)]”…””}”(hj‘h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j^h³hÊh´K:hjubjo)”}”(hhh]”hÌ)”}”(hXCThe EFI stub will search for a display mode that matches the specified horizontal and vertical resolution, and optionally bit depth, and set the mode of the display to it if one is found. The bit depth can either "rgb" or "bgr" to match specifically those pixel formats, or a number for a mode with matching bits per pixel.”h]”hXKThe EFI stub will search for a display mode that matches the specified horizontal and vertical resolution, and optionally bit depth, and set the mode of the display to it if one is found. The bit depth can either “rgb†or “bgr†to match specifically those pixel formats, or a number for a mode with matching bits per pixel.”…””}”(hj¢h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K6hjŸubah}”(h]”h ]”h"]”h$]”h&]”uh1jnhjubeh}”(h]”h ]”h"]”h$]”h&]”uh1jXh³hÊh´K:hjUh²hubjY)”}”(hŒÞauto The EFI stub will choose the mode with the highest resolution (product of horizontal and vertical resolution). If there are multiple modes with the highest resolution, it will choose one with the highest color depth. ”h]”(j_)”}”(hŒauto”h]”hŒauto”…””}”(hjÀh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j^h³hÊh´K@hj¼ubjo)”}”(hhh]”hÌ)”}”(hŒØThe EFI stub will choose the mode with the highest resolution (product of horizontal and vertical resolution). If there are multiple modes with the highest resolution, it will choose one with the highest color depth.”h]”hŒØThe EFI stub will choose the mode with the highest resolution (product of horizontal and vertical resolution). If there are multiple modes with the highest resolution, it will choose one with the highest color depth.”…””}”(hjÑh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K=hjÎubah}”(h]”h ]”h"]”h$]”h&]”uh1jnhj¼ubeh}”(h]”h ]”h"]”h$]”h&]”uh1jXh³hÊh´K@hjUh²hubjY)”}”(hŒŸlist The EFI stub will list out all the display modes that are available. A specific mode can then be chosen using one of the above options for the next boot. ”h]”(j_)”}”(hŒlist”h]”hŒlist”…””}”(hjïh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j^h³hÊh´KEhjëubjo)”}”(hhh]”hÌ)”}”(hŒ™The EFI stub will list out all the display modes that are available. A specific mode can then be chosen using one of the above options for the next boot.”h]”hŒ™The EFI stub will list out all the display modes that are available. 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