[Bug 1575000] Re: font glyph corruption on dialog box

Yuri Ribeiro Sucupira yuri_sucupira at hotmail.com
Sun Sep 11 02:30:12 UTC 2016 

Enabling OpenGL rendering also solved this for me (the attached file
shows which checkbox must be enabled/marked/checked, at the LibreOffice
GUI).

I'm running LibreOffice 5.1.4.2 on a 64-bit XUbuntu 16.04 "Xenial Xerus"
system. My computer is a Dell laptop (Dell Inspiron 5548) which has
hybrid graphics (it has two GPU - Graphics Processing Units): GPU 1 is
an Intel Broadwell-U Integrated Graphics (it's embedded into the i7
CPU/processor), while GPU 2 is an Advanced Micro Devices [AMD/ATI] Topaz
XT [Radeon R7 M260/M265] (it's a PCI Express 3.0 graphics card).

*Ubuntu (Ubuntu, XUbuntu, KUbuntu...) 16.04 distros ship with kernel
4.4.X, which has a bug that causes malfunction of the kernel with the
open source "amdgpu" and "radeon" graphics drivers (they superseded the
proprietary "fglrx" driver by AMD). See bug #1608042
(https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
amdgpu/+bug/1608042).

Hence, if your computer has any AMD GPU (despite of your computer having
hybrid graphics or not), and if your distro is *Ubuntu 16.04 and you
already installed MESA (OpenGL support for Linux) and activated OpenGL
rendering in LibreOffice, but the issue remais, it is likely that your
system is affected by the kernel/AMD bug.

It's thus recommended to download and install a further stable kernel,
like e.g. kernel v4.7.2:

- For 64-bit *Ubuntu, download these three files:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7.2/linux-headers-4.7.2-040702_4.7.2-040702.201608201334_all.deb
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7.2/linux-headers-4.7.2-040702-generic_4.7.2-040702.201608201334_amd64.deb
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7.2/linux-image-4.7.2-040702-generic_4.7.2-040702.201608201334_amd64.deb

- For 32-bit *Ubuntu, download these three files:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7.2/linux-headers-4.7.2-040702_4.7.2-040702.201608201334_all.deb
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7.2/linux-headers-4.7.2-040702-generic_4.7.2-040702.201608201334_i386.deb
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7.2/linux-image-4.7.2-040702-generic_4.7.2-040702.201608201334_i386.deb

...then open a shell terminal window, cd (change directory) into the
folder where you donwloaded those DEB packages into, then install the
packages and restart your system. For instance, if you downloaded those
DEB packages into your downloads folder (/home/your-username/Downloads),
then this command will cd into your downloads folder, install the
downloaded packages and restart your system (your password will be asked
by the shell):

cd ~/Downloads ; sudo dpkg -i linux-*.deb ; telinit 6

** Attachment added: "Activate OpenGL rendering."
   https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1575000/+attachment/4738500/+files/opengl_rendering.jpg

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https://bugs.launchpad.net/bugs/1575000

Title:
   font glyph corruption on dialog box

Status in X.Org X server:
  Unknown
Status in xorg-server package in Ubuntu:
  Fix Released
Status in xorg-server source package in Xenial:
  Confirmed

Bug description:
  [Impact] 
   * This makes it impossible to read some text (usually yes/no questions) in Libreoffice.  This makes it more difficult to use LibreOffice on AMD graphics.

  [Test Case]

  1. Open for instance LibreOffice Writer
  2. Copy some text to the clipboard
  3. Open the Paste Special dialog with CTRL-SHIFT-V

  [Regression Potential]

   This modifies glamor to be used less.  There might be a potential for
  a performance hit in other cases?

  [Original Report]
  I get a font glyph corruption in various dialog boxes in libreoffice. This happens using the following graphic configuration:
    *-display
         description: VGA compatible controller
         product: Bonaire [FirePro W5100]
         vendor: Advanced Micro Devices, Inc. [AMD/ATI]
         physical id: 0
         bus info: pci at 0000:03:00.0
         version: 00
         width: 64 bits
         clock: 33MHz
         capabilities: vga_controller bus_master cap_list rom
         configuration: driver=radeon latency=0

  I don't see this in other graphics (NVIDIA, INTEL).

  Steps to reproduce:

  1. Open for instance LibreOffice Writer
  2. Copy some text to the clipboard
  3. Open the Paste Special dialog with CTRL-SHIFT-V

  I attach a screenshot of the corrupted font.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xserver-xorg-video-radeon 1:7.7.0-1
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  .tmp.unity_support_test.0:

  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Tue Apr 26 09:23:41 2016
  DistUpgraded: 2016-03-11 12:35:09,412 DEBUG enabling apt cron job
  DistroCodename: xenial
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 5.0.18, 4.4.0-18-generic, x86_64: installed
   virtualbox, 5.0.18, 4.4.0-21-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Bonaire [FirePro W5100] [1002:6649] (prog-if 00 [VGA controller])
     Subsystem: Dell Bonaire [FirePro W5100] [1028:230c]
  InstallationDate: Installed on 2015-10-17 (191 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: Dell Inc. Precision Tower 7810
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=63c3c29d-24d9-4ecb-8511-3f2291792bc5 ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-ati
  UpgradeStatus: Upgraded to xenial on 2016-03-11 (45 days ago)
  dmi.bios.date: 04/14/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0GWHMW
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 7
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd04/14/2015:svnDellInc.:pnPrecisionTower7810:pvr01:rvnDellInc.:rn0GWHMW:rvrA00:cvnDellInc.:ct7:cvr:
  dmi.product.name: Precision Tower 7810
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.67-1
  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
  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: Mon Apr 25 08:20:34 2016
  xserver.configfile: default
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.18.3-1ubuntu2
  xserver.video_driver: radeon

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