*** This bug is a duplicate of bug 2105402 ***
https://bugs.launchpad.net/bugs/2105402
# Primary Related Bug (Canonical/Ubuntu): #
Launchpad #2105402: "Plucky fails to boot on (older) Macs"
Relevance: Highest. This is the central, canonical bug tracking the regression
in Ubuntu 25.04's Linux kernel EFI stub causing boot failures on older Intel
Macs.
Status: Fix Committed (Ubuntu identified the faulty patch).
Affected Hardware: iMac14,1/14,4, MacBookPro8,2, MacBookAir5,2, MacPro6,1, etc.
Kernel Versions: 6.14.0-11 onward.
Notes: Directly related regression identified as EFI stub commit issue.
# Secondary (Upstream/Kernel.org and Related Reports): #
Launchpad #2107658: "Linux 6.14 fails to boot on MacBookPro8,2"
Relevance: Very high. Confirms issue specifically for 6.14 kernel on similar
Apple hardware. Also notes successful boot with mainline kernel builds.
Hardware: MacBookPro8,2 (2011).
Kernel Versions: Ubuntu Linux 6.14.x.
#Ask Ubuntu Question #1501749: "Kernel problem? Can't install 25.04 onto Macs" #
Relevance: High. User-level confirmation of the exact symptom (black screen,
EFI stub freeze) affecting multiple older Macs.
Hardware: Mid-2011 and Late-2013 iMacs (similar vintage to yours).
Kernel Versions: Ubuntu Linux 6.14.x.
Linux Kernel Mailing List: "[PATCH v3] efi/libstub: mitigate T14s
exit_boot_services() failure"
Relevance: High. Original upstream kernel.org patch discussion that introduced
the problematic EFI stub workaround.
Hardware: Lenovo T14s & Snapdragon (original intent), inadvertently broke older
Apple hardware.
Kernel Versions: Introduced in upstream Linux kernel (~6.14-rc window).
# Additional Supporting Bug Reports & Discussions: #
Reddit /r/linux_on_mac Thread: "Ubuntu 25.04 hangs at EFI stub loading initrd"
Relevance: Moderate. Community confirmation of widespread issue.
Kernel Versions: Ubuntu Linux ≥6.14.
# Red Hat Bugzilla #2275807: "Fedora 40 Kernel 6.14.x EFI boot regression" #
Relevance: Moderate. Fedora experienced similar boot issues with kernel 6.14
EFI stub on some older Macs.
Status: Similar fix committed.
Kernel Versions: Fedora Linux kernel 6.14.x.
# Arch Linux Bug Tracker #80971: "Linux kernel 6.14.x hangs during boot on
Intel Macs" #
Relevance: Moderate. Confirms similar issue reported in Arch Linux.
Kernel Versions: Arch Linux kernel 6.14.x.
** This bug has been marked a duplicate of bug 2105402
Plucky fails to boot on (older) Macs
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https://bugs.launchpad.net/bugs/2115580
Title:
New kernel failed to boot after upgrade to Ubuntu 25.04(plucky) on
iMac14,4
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