dx-packages team mailing list archive

[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

got a word from a unity dev about what's happening with opengl 2.x

"Yes, the non-working codepath invokes a much more heavyweight Gaussian
blur convolution function. The working codepath also downscales the
image before blurring.

An example of the shader code for the broken pass is as follows.

    "varying vec4 v_tex_coord;
     uniform sampler2D tex_object;
     uniform vec2 tex_size;
     #define NUM_SAMPLES %d
     uniform float weights[NUM_SAMPLES];
     uniform float offsets[NUM_SAMPLES];
     void main()
     {
      vec3 acc = texture2D(tex_object, v_tex_coord.st).rgb*weights[0];
      for (int i = 1; i < NUM_SAMPLES; i++)
      {
        acc += texture2D(tex_object, (v_tex_coord.st+(vec2(0.0, offsets[i])/tex_size))).rgb*weights[i];
        acc += texture2D(tex_object, (v_tex_coord.st-(vec2(0.0, offsets[i])/tex_size))).rgb*weights[i];
      }
      gl_FragColor = vec4(acc, 1.0);
     }";

The NUM_SAMPLES in this case is 10."

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https://bugs.launchpad.net/bugs/1222602

Title:
  [regression] [gen3] Mesa 9.2 makes Unity unusable on Atom class
  hardware and 943/945 graphics controllers

Status in Mesa:
  Confirmed
Status in Release Notes for Ubuntu:
  New
Status in “mesa” package in Ubuntu:
  Fix Committed
Status in “nux” package in Ubuntu:
  Fix Released
Status in “unity” package in Ubuntu:
  Invalid

Bug description:
  After the upgrade to Mesa 9.2.0 unity is barely usable.
  Dash, Alt+Tab switcher and Alt+F2 command line shows in more than 1 minute, using 100% cpu.

  A downgrade to mesa 9.1.6-2ubuntu2 restores full performance.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: libgl1-mesa-glx 9.2-1ubuntu1
  ProcVersionSignature: Ubuntu 3.11.0-5.11-generic 3.11.0
  Uname: Linux 3.11.0-5-generic i686
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Mon Sep  9 01:51:45 2013
  DistUpgraded: 2013-09-08 20:36:47,811 DEBUG enabling apt cron job
  DistroCodename: saucy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Mobile 945GSE Express Integrated Graphics Controller [8086:27ae] (rev 03) (prog-if 00 [VGA controller])
     Subsystem: Micro-Star International Co., Ltd. Device [1462:0110]
     Subsystem: Micro-Star International Co., Ltd. Device [1462:0110]
  InstallationDate: Installed on 2013-09-07 (1 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
  MachineType: MICRO-STAR INTERNATIONAL CO., LTD U90/U100
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-5-generic root=UUID=674329c8-d0a6-4954-89c0-72821cfa0ba8 ro quiet splash vt.handoff=7
  SourcePackage: mesa
  UpgradeStatus: Upgraded to saucy on 2013-09-08 (0 days ago)
  dmi.bios.date: 12/01/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.3
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: U90/U100
  dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
  dmi.board.version: Ver.001
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 10
  dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO., LTD
  dmi.chassis.version: Ver.001
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.3:bd12/01/2009:svnMICRO-STARINTERNATIONALCO.,LTD:pnU90/U100:pvrVer.001:rvnMICRO-STARINTERNATIONALCO.,LTD:rnU90/U100:rvrVer.001:cvnMICRO-STARINTERNATIONALCO.,LTD:ct10:cvrVer.001:
  dmi.product.name: U90/U100
  dmi.product.version: Ver.001
  dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO., LTD
  version.compiz: compiz 1:0.9.10+13.10.20130828.2-0ubuntu1
  version.libdrm2: libdrm2 2.4.46-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.2-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.2-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.14.2.901-2ubuntu4
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu6
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.14-4ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
  xserver.bootTime: Mon Sep  9 01:46:55 2013
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                1001 
   vendor                                     HSD
  xserver.version: 2:1.14.2.901-2ubuntu4

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