Horizontal white lines appear messing the screen display after upgrading to Kubuntu 15.10 a computer with Intel Graphics hardware
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Incomplete
|
Low
|
Unassigned |
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
ProcVersionSign
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)
affects: | intel-vaapi-driver (Ubuntu) → xserver-xorg-video-intel (Ubuntu) |
After about 1 hour working fine, the failure is present again, so the previous workaround of setting Tearing prevention (vsync) to 'never' no longer worked. I experimented again with some display settings and found that setting Rendering Engine to XRender, instead of OpenGL 2.0 or OpenGL 3.1 solves the failure, at least for now.