tedaste, this would appear a two part problem (acpi and graphics), but
let the initial focus be on the first issue of not able to boot up at
all without acpi-off. Hence, the issue you are reporting is an upstream
one. Could you please report this problem following the instructions
verbatim at https://wiki.ubuntu.com/Bugs/Upstream/kernel to the
appropriate mailing list (TO Rafael J. Wysocki, and Len Brown, CC linux-
acpi)?
Please provide a direct URL to your post to the mailing list when it
becomes available so that it may be tracked.
Thank you for your understanding.
** Changed in: linux (Ubuntu)
Importance: Medium => High
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Summary changed:
- Ubuntu not booting on iMac 5K with ACPI enabled
+ [iMac17,1] Not booting with ACPI enabled
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1525615
Title:
[iMac17,1] Not booting with ACPI enabled
Status in linux package in Ubuntu:
Triaged
Bug description:
With a 27in 5k ( new as of two weeks ago) I'm unable to boot. The
applies to both the live installer and a system installed on disk. I
just get a blank screen. It gives a blank screen event if the "quiet"
is removed from the kernel parameters. The system has a 250G SSD. I'm
using the Kubutu live installer for Wily off a USB stick.
WORKAROUND: Use kernel parameters:
acpi=off nomodeset
---
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: KDE
DistroRelease: Ubuntu 15.10
InstallationDate: Installed on 2015-12-08 (9 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
Package: linux (not installed)
Tags: wily
Uname: Linux 4.4.0-040400rc5-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
---
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: toivo 1330 F.... pulseaudio
/dev/snd/controlC1: toivo 1330 F.... pulseaudio
DistroRelease: Ubuntu 15.10
InstallationDate: Installed on 2015-12-08 (14 days ago)
InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Apple Inc. iMac17,1
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_AU:en
TERM=xterm
PATH=(custom, no user)
LANG=en_AU.UTF-8
SHELL=/usr/bin/zsh
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-21-generic.efi.signed
root=UUID=0751bb9a-8e2b-439a-aca9-e29cf2dadb77 ro persistent acpi=off nomodeset
ProcVersionSignature: Ubuntu 4.2.0-21.25-generic 4.2.6
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.2.0-21-generic N/A
linux-backports-modules-4.2.0-21-generic N/A
linux-firmware 1.149.3
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: wily
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
Uname: Linux 4.2.0-21-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 10/09/2015
dmi.bios.vendor: Apple Inc.
dmi.bios.version: IM171.88Z.0105.B04.1510091442
dmi.board.name: Mac-65CE76090165799A
dmi.board.vendor: Apple Inc.
dmi.board.version: iMac17,1
dmi.chassis.type: 9
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-65CE76090165799A
dmi.modalias:
dmi:bvnAppleInc.:bvrIM171.88Z.0105.B04.1510091442:bd10/09/2015:svnAppleInc.:pniMac17,1:pvr1.0:rvnAppleInc.:rnMac-65CE76090165799A:rvriMac17,1:cvnAppleInc.:ct9:cvrMac-65CE76090165799A:
dmi.product.name: iMac17,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
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