Public bug reported: Problem: Laptop panel turns off during boot, which makes the laptop unusable.
Expected Results: Laptop panel is ON when I boot without "nomodeset", and I can use graphical UI. Environment: Ubuntu 16.04 (clean install) kernel 4.4.0-24 X.Org X Server 1.18.3 Hardware: HP ProBook 4535 [AMD/ATI] Sumo [Radeon HD 6380G] [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] (rev ff) Overview: I used "nomodeset" kernel parameter to install Ubuntu, because without it I face the same bug - Laptop panel turns off during boot. UI works with this kernel parameter but it's not usable as it's very slow(!!!). When "nomodeset" is removed the system boots but the screen turns off during the boot. Guys from #radeon channel on "irc.freenode.net" said: <chithead> radeon 0000:00:01.0 is the sumo2 and it locks up <chithead> radeon 0000:01:00.0 is the caicos but there seems to be no problem with it <airlied> the problem is the sumo crashing and failing to train displayport <airlied> as it's the travis bridge it's trying to modeset which is the panel <airlied> fixing the travis bridge is the first problem I also tried the latest (v4.7-rc3) manually installed kernel, confirmed that the bug remains, and submitted the bug here https://bugs.freedesktop.org/show_bug.cgi?id=96527 . ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10 Uname: Linux 4.4.0-24-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' Date: Tue Jun 14 21:33:48 2016 DistUpgraded: Fresh install DistroCodename: xenial DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Sumo [Radeon HD 6380G] [1002:9643] (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Sumo [Radeon HD 6380G] [103c:168c] Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] [1002:6760] (rev ff) (prog-if ff) InstallationDate: Installed on 2016-06-12 (2 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: Hewlett-Packard HP ProBook 4535s ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic root=UUID=74aa7181-639e-464e-b1e1-2af72c4b6e35 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/11/2015 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68CPC Ver. F.60 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 168B dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 32.1D dmi.chassis.asset.tag: CNU13746LQ dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68CPCVer.F.60:bd03/11/2015:svnHewlett-Packard:pnHPProBook4535s:pvrA0000402:rvnHewlett-Packard:rn168B:rvrKBCVersion32.1D:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP ProBook 4535s dmi.product.version: A0000402 dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.12.2+16.04.20160526-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Tue Jun 14 21:32:36 2016 xserver.configfile: default xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension. xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.18.3-1ubuntu2.2 xserver.video_driver: radeon ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug ubuntu xenial -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1592519 Title: [radeon] sumo2 locks up and fails to train displayport during boot (panel turns off) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1592519/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
