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[Sebastian Ramacher <1509868@xxxxxxxxxxxxxxxxxx>]

** Package changed: intel-vaapi-driver (Ubuntu) => xserver-xorg-video-
intel (Ubuntu)

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https://bugs.launchpad.net/bugs/1509868

Title:
  Horizontal white lines appear messing the screen display after
  upgrading to Kubuntu 15.10 a computer with Intel Graphics hardware

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

Bug description:
  Output of lspci command:

  00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)                                                                                    
  00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)                                                                  
  00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 01)                                                                      
  00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 01)                                                                                      
  00:1c.1 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 2 (rev 01)                                                                                      
  00:1c.2 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 3 (rev 01)                                                                                      
  00:1c.3 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 01)                                                                                      
  00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 01)                                                                              
  00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 01)                                                                              
  00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 01)                                                                              
  00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 01)                                                                              
  00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 01)                                                                                
  00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)                                                                                                         
  00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)                                                                            
  00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)                                                                                   
  00:1f.2 IDE interface: Intel Corporation NM10/ICH7 Family SATA Controller [IDE mode] (rev 01)                                                                           
  00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 01)                                                                                             
  02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 01)

  I open Firefox and after some minutes using it, suddenly the screen
  display is "visually damaged" by a lot of very thin horizontal white
  lines. This began to happen after upgrading to Kubuntu 15.10 and
  someone via IRC suggested me this workaround: Go to KDE System
  Settings -> Display configuration -> Compositor -> Tearing prevention
  (vsync) = set to 'never'; I did that and by fortune it worked!

  After this bug is reviewed and solved, I would like to restore the
  Tearing prevention (vsync) setting to "Automatic" again.

  Thanks in advance for attending this.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: i965-va-driver 1.6.0-1
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Sun Oct 25 16:28:21 2015
  InstallationDate: Installed on 2015-02-14 (253 days ago)
  InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  SourcePackage: intel-vaapi-driver
  UpgradeStatus: No upgrade log present (probably fresh install)

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