1. How big should the EFI partition be, some say 200 MB others say it needs to be 550 MB, does it mater? What size are your EFI partitions?
100M is good enough.
My asus, multiboot 15 distros, mostly UEFI, some bios-mode, the fat32 partition is less than 40% filled.
by the way, if I
let win7_64 decides to take over whole disk, it creates a 100M fat32 partition
let debian7.x_64 takes over whole disk, it creates a 500M fat32 partition.
on my USB-drive-UEFI-multiboot, I gave it 150M, now it used 2.8M only, probably because all 5 distros are Linux.
MS took a lot of space, full of data in MS boot files ( including international languages choice...so you can see how much it took...)
if you wish to have more feature or function in the same boot partition, then of course you can add upto 500M.
and one suggestion i have is, have a habit of backup this important ESP.
when you play with another linux distros , windows7/8 , windows update, linux update etc, if something did some bad thing to the boot files, making it unbootable, at least you can repair it simply by coping from backup to the ESP.
2. Grub by default installs on /dev/sda but tutorials say it needs to be in the EFI partition (/dev/sda1) what do you use?
I had used both many times just to have a feel on what it should be because I am learning.
but it is dependent on distros.. so it is hard to say.
a few of them works with /dev/sda , even without specifying ESP!!
thus a better way is at least check to be sure it get mounted onto /boot/efi.
a complete way is to mount and check, both actions force people to be careful.
some people have multiple fat32 partitions, some people like to use FAT32 as data partition, because they do not like MS's NTFS, so they have to decide which one is the main boot partition for installer to place boot files.
I have read some people did UEFI installation onto a msdos-partition hard disk, which already have Windows in NTFS partition plus a recovery / utilities FAT partition, and when they do boot-repair, somehow that FAT partition ended up with boot files.. it is confusing but that is reality.. too many combinations exist.
3. Should I install Plymouth? I heard that it can be buggy and create boot problems.
It is up to you.
I Avoid. I think that 'pretty face for one second' gave more headaches, but that is personal perferences.
I am happy to see text scrolling on screen.. old fashioned.
I tested my usb pen with the Live Sloydx install with UnetBootin, booted in UEFI mode and then run the command:
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[ -d /sys/firmware/efi ] && echo "EFI boot on HDD" || echo "Legacy boot on HDD"
It return 'EFI boot on HDD' so it really is in EFI mode
thanks for this info
when you used rufus you had the same problem as me, you could boot in UEFI mode in to the pen but couldn't boot in to your HDD, maybe it's Gparted that has a bug and doesn't install the EFI partition correctly.
I am inclined to think that is had nothing to do with gparted.
gparted is afterall a GUI front end utility to manipulate partition of disk.
and when distro installer try to install onto hard disk, gparted should have no play..just my logic, which can be wrong.
Were you ever able to install SolydXK in UEFI mode without step 7 repairing grub?
solydx_64_201405 was first one that was said to be UEFI capable.
I tested many times, using linux dd, Win'sDD, so far unable to boot with UEFI mode.
With unetbootin, i can select UEFI , but it boots into grub rescue> for all tests..
That is why I do not even know and your info helps me somehow.
In your case you can at least see UEFI in Live mode, so your issue is one less than mine.
perhaps you can really try jump direct to chrooting from a UEFI-booted-Live mode, and see if it allows you to make a reinstall of grub-efi and grub-install /dev/sda.
i think something is not right in the uefi-boot/grub-efi portition of the iso.
because it can boot in bios-mode, install in bios-mode and run OK.
in addition, chroot repair works after update+ grub-efi + grub-install /dev/sda.
ScottQuier wrote:Can I suggest/request you capture that and make it a tutorial?
Yes please! It would be very helpful for noobs like me, and looking at the forums in many sites there are many people with the same problem.
need more people to test, because I have only so far tested on two , Asus laptop and HP8200.
but i hope the iso can be reviewed so that it can get into UEFi with Linux dd/windows'dd.