Ok, I'm checking it in.
It triggers today too after less than 15min. We have summer heat. It's 30°C here near the Mac. Thank you very much for your attention ! :) -- 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/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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1452858/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
