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[Bug 1578621] Re: Ubuntu 16.04 with kernel 4.4.0-21 freezes at the password prompt upon boot unless acpi=off
Albert, as per https://support.apple.com/en-us/HT201518 an update to
your computer's buggy, insecure, and outdated BIOS is available
(MBP111.0138.B16). If you update to this following
https://help.ubuntu.com/community/BIOSUpdate does it change anything?
For more on BIOS updates and linux, please see
Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.
Also, you don't have to create a new bug report.
Once the BIOS is updated, if the problem is still reproducible:
1) Please provide the output of the following terminal command (not perform an apport-collect):
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
2) Please make a comment specifically advising on if there was an improvement or not.
3) Please mark this report Status Confirmed.
If it's not reproducible, please mark this as Invalid.
Thank you for your understanding.
** Tags added: bios-outdated-b16
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Ubuntu 16.04 with kernel 4.4.0-21 freezes at the password prompt upon
boot unless acpi=off
Status in linux package in Ubuntu:
In this macbook pro 11,1, the kernel 4.4.0-21 was able to boot just
But, it would took about 30 seconds before the boot sequence would
start, because the GRUB partition was not "blessed" (a particularity
of UEFI systems in apple hardware).
So I rebooted, held down command+alt+R, which boots from "internet recovery mode" into MacOSX (I don't have otherwise MacOSX installed), from the apple menu I opened a terminal and:
1. Listed the partitions with "diskutil list" to find out which partition has GRUB.
2. Run the blessing command: "bless --device /dev/disk1s1 --setBoot --legacy --verbose".
(While there, I took the opportunity to silence the startup chime
sound with "nvram SystemAudioVolume=%00".)
Upon reboot, there is no more delay (hurray!) but now the 4.4.0-21
kernel would lead to a freeze upon reaching the desktop password
prompt. The keyboard and mouse were unresponsive.
To address this, I forced shutdown by holding down the power key for 5
seconds, then rebooted holding down the "ESC" key to enter the GRUB
menu, and added "acpi=off" to the kernel parameters.
The result: booted just fine.
The freeze is reproducible. Happened a number of times until I
understood that acpi was the issue.
Running without a battery charge indicator or a broken wifi is not
ideal. Is there any workaround to this issue?
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
USER PID ACCESS COMMAND
/dev/snd/controlC1: albert 1864 F.... pulseaudio
/dev/snd/controlC0: albert 1864 F.... pulseaudio
Date: Thu May 5 08:42:53 2016
InstallationDate: Installed on 2014-09-16 (597 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Apple Inc. MacBookPro11,1
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=1fe82ec9-9c83-4e33-9506-2f7afb8d9d64 ro libata.force=noncq acpi=off quiet splash vt.handoff=7
UpgradeStatus: Upgraded to xenial on 2016-04-23 (12 days ago)
dmi.bios.vendor: Apple Inc.
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.vendor: Apple Inc.
dmi.chassis.vendor: Apple Inc.
dmi.sys.vendor: Apple Inc.
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