William Morris

I tried it again by burning the ISO to a DVD instead of USB. This succeeded, notwithstanding various errors and warnings that suggested it wouldn't boot. The iMac now boots in legacy mode and suspends/recovers without a pink screen, so job done, It does still use rEFInd, which surprises me. Is that expected? I thought the boot-restore process would use just legacy GRUB. Attached are the xxd dumps and the new Boot Info generated after booting in legacy mode. On waking from suspend the wired network...

Hmm, seems like I need help to repair the boot-repair image :-( I burned boot-repair to a good USB stick and tried booting by holding Alt and the power button on the iMac. This gave me two options 'Windows' (which refers to the internal HD) and EFI boot. The latter is the USB boot-recovery. I booted from the latter and after a short period it said something like Error: '/boot' not found Looking at the USB, it does have a boot directory. Any suggestions?

Thanks, I'll try that. I tried the boot-repair tool under the running system and it looks easy, right at my level :-) It wouldn't do the job from the running system so I'll put it on a USB and see if it works. I've added the boot info generated by boot-repair before taking any action, just for reference. @joevt thanks. Yes I should have given sda, not sda1.

And for sda3, the linux partition: od -Ax -a /dev/sda3 000000 nul nul nul nul nul nul nul nul nul nul nul nul nul nul nul nul * 000400 nul nul k nul nul | - soh L del nak nul etb e stx soh 000410 D etx c nul nul nul nul nul stx nul nul nul stx nul nul nul 000420 nul nul nul nul nul nul nul nul nul sp nul nul H v H f 000430 G v H f bs nul del del S o soh nul soh nul nul nul 000440 ~ v D f nul nul nul nul nul nul nul nul soh nul nul nul 000450 nul nul nul nul vt nul nul nul nul soh nul nul < nul nul...

Here's the MBR sudo od -Ax -a /dev/sda1 000000 k X dle m k f s . f a t nul stx bs sp nul 000010 stx nul nul nul nul x nul nul ? nul del nul nul bs nul nul 000020 h _ ht nul X stx nul nul nul nul nul nul stx nul nul nul 000030 soh nul ack nul nul nul nul nul nul nul nul nul nul nul nul nul 000040 nul soh ) J g j ] B O O T sp sp sp sp sp 000050 sp sp F A T 3 2 sp sp sp so us > w | , 000060 " @ t vt V 4 so ; bel nul M dle ^ k p 2 000070 d M syn M em k ~ T h i s sp i s sp n 000080 o t sp a sp b o o t...

I have a 2008 iMac on which I've installed Linux Mint Debian Edition. There's a problem when exiting from Suspend that leaves the screen pink and stripey. This is a known issue that is apparently fixed by booting in legacy mode. When I boot, rEFInd shows me three options: EFI\debian\grubx64.efi from BOOT boot\vmlinuz-6.1.0-12-amd64 from 107 GiB ext4 volume Legacy OS from whole disk volume Each of these is from the disk (each has a little disk icon) The first two work well and appear the same when...