![]() sudo update-grub and you're good to go on all fronts. For GRUB2: sudoedit /etc/default/gruband add the parameters to the end of the value for GRUB_CMDLINE_LINUX and either uncomment the entry for GRUB_GFXPAYLOAD_LINUX and change the value to keep or add a line to the end of the file that reads GRUB_GFXPAYLOAD_LINUX="keep".This indicates that the firmware detected the disk, discovered the partition, and was able to mount the file system. and if any results are shown, use sudo cp -i /boot/nf for each one and agree to overwrite them with the one you just edited. If you drop into UEFI shell on your platform you should see the 'Mapping table' (see the sample picture below), if there is a device labeled 'FS0'. Then run find /boot/efi -type f -name "nf" in case there are other copies of the file for use with kernel stubs, et al. For rEFInd: sudoedit /boot/nf and add those parameters to the end of all the option lines.From the command prompt, install the X11 framebuffer driver with apt install xserver-xorg-video-fbdev and once complete, invoke systemctl reboot to restart your computer and see if the framebuffer drivers solve the issue.Īdd modprobe.blacklist=radeon to your kernel boot parameters (and optionally gfxpayload=keep and/or vt.handoff=7 if you try them and find further improvement), nomodeset is not the answer here. At the recovery menu, first select the network option to enable your network interfaces, then root to be provided a root shell. Basically the goal is to forego the horsepower of the graphics card early in the boot process and opt instead for the software-rendered framebuffer until such time as the graphics drivers have loaded successfully.įrom the rEFInd bootloader selection screen, highlight your preferred kernel and press F2 to show the advanced options, then select "Boot into recovery mode" or if it isn't offered, press F2 again and remove all the parameters after ROOT=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX, replacing them with rw nomodeset loglevel=6 recovery. That particular iMac vintage was fairly memorable for implementation, one which I've nicknamed the "Sierra Madre" as an homage to an engineering team that obviously declared "Badges? We ain’t got no badges! We don’t need no badges! I don’t have to show you any stinking badges!" when deciding how much of the nascent UEFI specification they would adhere to. Would you know what causes that? Thanks!!!ĭid you ever find a solution to the Boot list filling up? It happened to me again this morning (only became a problem after I installed Clover, till then I'd been using OS X in Legacy, likewise Windows 7 and now Windows 10).With the limited information you've shared thus far, I can think of two likely means to improve the situation, ideally being implemented in tandem. but it's using that slow EFI partition of the not-so-safe backup disk. As soon as I format the EFI partition on the SSD, my system boots normaly. Then the only way is to disconnect the SSD drive and boot on Windows. I wanted to clone that EFI partition to my primary SSD EFI partition but as soon as I do that (or install clover on it), I can't boot my computer at all and can't even access the bios. I happen to have an installed Clover EFI on the wrong disk (the partition is on the 2Tb drive I only use to make backups). This is option B in the Clover wiki: /What-is-what That way you have one volume your firmware is aware of that is bootable (it boots Clover) and Clover is then aware of your ML, Yosemite and Windows loaders (when it scans your disks) and you can choose from the GUI which to load. Disable BIOS compatibility / legacy boot in your firmware settings to avoid any confusion. The windows bootloader (BOOTMGFW.EFI) should be installed on the same ESP on same disk as Clover. Intel 4970k Devils Canyon (Haswell Refresh)įor UEFI booting what you need is a single installation of Clover EFI to only one of your disks, installed for UEFI booting only, and Windows must also be installed from an EFI boot (not legacy/BIOS mode). ![]() ![]() Since I'm in the middle of another OSX installation I'm constantly restarting my PC and in turn getting these UEFI OS' options that don't even work when selected.ġ5 minutes ago, I tried booting Yosemite but it won't even show on boot selection and if I selected the dreaded UEFI OS, it would take me to a grey apple screen and an endless loading icon. The worst part is that the only way to fix this is to do a CMOS reset, disconnect all the power cables that connect to my drives and pray for the best. I've noticed that for every restart it will create another and another, right up until my computer freezes, gets stuck at 'press del or f1' and doesn't even post. Not sure if this has been answered but I've got an annoying problem.Įvery so often I end up with a stack of "UEFI OS" options to click when I'm prompted to select my bootloader.
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