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 Desktop
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https://bugs.launchpad.net/bugs/1592519

Title:
  [radeon] sumo2 locks up and fails to train displayport during boot
  (panel turns off)

Status in xorg package in Ubuntu:
  New

Bug description:
  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

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