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https://bugs.launchpad.net/bugs/1466053

Title:
  System hangs completely when executing glxgears with DRI_PRIME=1

Status in xserver-xorg-video-ati package in Ubuntu:
  New

Bug description:
  I'm using a Dell Latitude E6540 laptop with hybrid graphics (Intel HD + Radeon HD8790M).
  Using DRI_PRIME=1 to offload to the discrete GPU causes different problems, from simple program crash
  to complete system hang (i.e. no ctrl-alt-F1, no external ssh access, only long-press power button shutdown possible).
  When system does not hang (app crash) the error is always something concerning 'dri2_allocate_textures' in gallium.
  For example:

  $ DRI_PRIME=1 glxgears    (hangs system)
  Black window displayed, resizing it a bit makes 3D gears appear, resizing a little more completely hangs system

  $ DRI_PRIME=1 /media/data/opt/SweetHome3D-4.4/SweetHome3D           (application crash)
  Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar 
  Java 3D: implicit antialiasing enabled
  java: ../../../../../../src/gallium/state_trackers/dri/dri2.c:526: dri2_allocate_textures: Assertion `drawable->textures[statt]' failed.
  Aborted (core dumped)

  $ DRI_PRIME=1 google-chrome   (warning but no crash)
  [21803:21803:0617/130700:ERROR:url_pattern_set.cc(240)] Invalid url pattern: chrome://print/*
  [10:10:0617/130700:ERROR:resource_request_policy.cc(57)] Denying load of chrome-extension://apdfllckaahabafndbhieahigkjlhalf/page_embed_script.js from hosted app.
  [10:10:0617/130701:ERROR:resource_request_policy.cc(57)] Denying load of chrome-extension://apdfllckaahabafndbhieahigkjlhalf/page_embed_script.js from hosted app.
  /chrome/chrome --type=gpu-process --channel=21803.0.1199310008 --: ../../../../../../src/gallium/state_trackers/dri/dri2.c:526: dri2_allocate_textures: Assertion `drawable->textures[statt]' failed.
  [21803:21833:0617/130704:ERROR:browser_gpu_channel_host_factory.cc(134)] Failed to launch GPU process.

  
  Happy to help debug problem, but I don't know where to start.. :-)

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8
  Uname: Linux 3.19.0-21-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,staticswitcher,workarounds,scale,expo,ezoom,dbus]
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Wed Jun 17 12:52:11 2015
  DistUpgraded: 2015-05-04 10:38:23,123 DEBUG enabling apt cron job
  DistroCodename: vivid
  DistroVariant: ubuntu
  DkmsStatus:
   vboxhost, 4.3.28, 3.19.0-16-generic, x86_64: installed
   vboxhost, 4.3.28, 3.19.0-18-generic, x86_64: installed
   vboxhost, 4.3.28, 3.19.0-20-generic, x86_64: installed
   vboxhost, 4.3.28, 3.19.0-21-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:05be]
   Advanced Micro Devices, Inc. [AMD/ATI] Mars XTX [Radeon HD 8790M] [1002:6606] (rev ff) (prog-if ff)
  InstallationDate: Installed on 2013-09-12 (642 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Dell Inc. Latitude E6540
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-21-generic root=UUID=c1c1766d-f37e-4c42-957a-5a87fe06105b ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-ati
  UpgradeStatus: Upgraded to vivid on 2015-05-04 (44 days ago)
  dmi.bios.date: 02/18/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0725FP
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd02/18/2014:svnDellInc.:pnLatitudeE6540:pvr01:rvnDellInc.:rn0725FP:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6540
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Wed Jun 17 09:52:23 2015
  xserver.configfile: default
  xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension.
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                5562 
   vendor                                     CMN
  xserver.version: 2:1.17.1-0ubuntu3

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