Yes, I have tried both mac and grub. Admittedly, I have blessed my refind installation and from their used refind to load grub. (My preferred method, given the number of boot options refind can handle). I haven't tried using the macOs bootloader to boot into linux directly.
On booting into Mac OS, The Mach kernel does not get hang trying to get the sd card working, however, a cold boot into ANYTHING still requires a 20-30 second delay. There is apparently a grub update. I'll see if I can get any result out of it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1794641 Title: Slow boot caused by unresponsive internal sd card reader To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794641/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
