kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Étienne BERSAC, thank you for reporting this and helping make Ubuntu
better. Could you please test the latest upstream kernel available from
the very top line at the top of the page (the release names are
irrelevant for testing, and please do not test the daily folder)
following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow
additional upstream developers to examine the issue.

If the test did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where XY and Z are numbers corresponding to the kernel version.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results.

** Tags added: latest-bios

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1452858

Title:
  Screen lit off on iMac 12,2 after a while

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hello,

  I'm running Ubuntu on an iMac 12,2 since november 2012. From time to
  time and more and more frequently the screen lit off. The only way i
  can get it on is to suspend/resume. But then, it lit off soon. I
  suspect some heating. Actually, the output of the cooling system is
  way hotter with Ubuntu than Mac OS X.

  So i would like to switch to the IGD card rather than the discrete
  one. But there is no vga_switcheroo.

  How to debug screen lit off ? How to detect screen heating ? How to
  disable discrete card ? Is it kernel ? Xorg ? Where to search ?

  Regards,
  Étienne

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15 [modified: boot/vmlinuz-3.19.0-15-generic]
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bersace    1709 F.... pulseaudio
                        gdm       28946 F.... pulseaudio
   /dev/snd/controlC0:  bersace    1709 F.... pulseaudio
                        gdm       28946 F.... pulseaudio
  CRDA:
   country AW: DFS-UNSET
   	(2402 - 2482 @ 40), (N/A, 20), (N/A)
   	(5170 - 5250 @ 40), (N/A, 20), (N/A)
   	(5250 - 5330 @ 40), (N/A, 20), (0 ms), DFS
   	(5490 - 5710 @ 40), (N/A, 27), (0 ms), DFS
  Date: Thu May  7 20:51:33 2015
  HibernationDevice: RESUME=UUID=a842b955-b20e-4514-af83-7b6f45dc1000
  InstallationDate: Installed on 2015-04-29 (8 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Apple Inc. iMac12,2
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-15-generic.efi.signed root=UUID=6f639d83-47c9-41fb-aa9b-c3931e37acc5 ro rootflags=subvol=@ quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: IM121.88Z.0047.B1F.1201241648
  dmi.board.name: Mac-942B59F58194171B
  dmi.board.vendor: Apple Inc.
  dmi.board.version: iMac12,2
  dmi.chassis.type: 13
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-942B59F58194171B
  dmi.modalias: dmi:bvnAppleInc.:bvrIM121.88Z.0047.B1F.1201241648:bd01/24/12:svnAppleInc.:pniMac12,2:pvr1.0:rvnAppleInc.:rnMac-942B59F58194171B:rvriMac12,2:cvnAppleInc.:ct13:cvrMac-942B59F58194171B:
  dmi.product.name: iMac12,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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