[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1578621
Title:
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:
Expired
Bug description:
In this macbook pro 11,1, the kernel 4.4.0-21 was able to boot just
fine.
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?
ProblemType: Bug
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
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: albert 1864 F.... pulseaudio
/dev/snd/controlC0: albert 1864 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu May 5 08:42:53 2016
EcryptfsInUse: Yes
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
RelatedPackageVersions:
linux-restricted-modules-4.4.0-21-generic N/A
linux-backports-modules-4.4.0-21-generic N/A
linux-firmware 1.157
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-04-23 (12 days ago)
dmi.bios.date: 02/12/2014
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP111.88Z.0138.B07.1402121134
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-189A3D4F975D5FFC
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro11,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-189A3D4F975D5FFC
dmi.modalias:
dmi:bvnAppleInc.:bvrMBP111.88Z.0138.B07.1402121134:bd02/12/2014:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC:
dmi.product.name: MacBookPro11,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
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