I have my minipc server Gigabite Brix 4105 and the monitor is not connected to
it. Installed Ubuntu Desktop 12.04.2.
I control it from my PC using VNC and no visual artifacts.
This is done through 20-intel.conf
Section "Device"
Identifier "intelgpu0"
Driver "intel"
Option "VirtualHeads" "1"
Option "TearFree" "true"
Option "TripleBuffer" "true"
Option "DRI" "false"
EndSection
I added the following commands to my startup script:
xrandr --newmode "1920x1080" 173.00 1920 2048 2248 2576 1080 1083 1088 1120
-hsync +vsync
xrandr --addmode VIRTUAL1 1920x1080
xrandr --output VIRTUAL1 --mode 1920x1080 --right-of HDMI1
xrandr -d :0 --output VIRTUAL1 --primary --auto
Generate modeline with gtf or cvt (Replace 1920 1080 with your preferred
resolution). Here is what I get:
$ cvt 1920 1080
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120
-hsync +vsync
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https://bugs.launchpad.net/bugs/1867668
Title:
Visual artifacts in Gnome Shell when using the old 'intel' Xorg driver
Status in xserver-xorg-video-intel package in Ubuntu:
Won't Fix
Bug description:
I've updated to Ubuntu 20.04 a couple of weeks ago, and there are some
minor (but pretty annoying) issues with Gnome Shell every time I load
the system. The background image has some green/violet/black visual
artifacts, and the text elements in Gnome Shell incorrectly display
some of the symbol. Changing the background image removes the
artifacts until the next reboot (but if I select the previous one
without rebooting, then I still see the same artifacts, so it's
probably cached somewhere). Restarting the shell via Alt+F2 `r`
usually removes the artifacts from the background image, but the text
issues are still present.
The issues are reprodicable with and without extensions, with 1.0, 1.5
and 2.0 display scaling factors applied, and they are not user-
specific (i.e. I was able to reproduce them after creating a new user
from scratch)
As far as I can say, only Gnome Shell is affected. All the
applications (including Gnome/GTK apps like Geary, Gedit, Tilix, both
"native" and flatpak) work fine without any issues
Sometimes, the application icons are also affected (as you can see on
one of the attached screenshots)
~> lsb_release -rd
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04
~> apt-cache policy gnome-shell
gnome-shell:
Installed: 3.35.91-1ubuntu2
Candidate: 3.35.91-1ubuntu2
Version table:
*** 3.35.91-1ubuntu2 500
500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
100 /var/lib/dpkg/status
~> gsettings get org.gnome.mutter experimental-features
['x11-randr-fractional-scaling']
~> uname -r
5.4.0-14-generic
hwinfo (videocard, monitor):
38: PCI 02.0: 0300 VGA compatible controller (VGA)
[Created at pci.386]
Unique ID: _Znp.pq3kk9M9L4C
SysFS ID: /devices/pci0000:00/0000:00:02.0
SysFS BusID: 0000:00:02.0
Hardware Class: graphics card
Model: "Intel UHD Graphics 620"
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x5917 "UHD Graphics 620"
SubVendor: pci 0x17aa "Lenovo"
SubDevice: pci 0x225c
Revision: 0x07
Driver: "i915"
Driver Modules: "i915"
Memory Range: 0x2ffa000000-0x2ffaffffff (rw,non-prefetchable)
Memory Range: 0x2fa0000000-0x2fafffffff (ro,non-prefetchable)
I/O Ports: 0xe000-0xe03f (rw)
Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled)
IRQ: 161 (64308 events)
Module Alias: "pci:v00008086d00005917sv000017AAsd0000225Cbc03sc00i00"
Driver Info #0:
Driver Status: i915 is active
Driver Activation Cmd: "modprobe i915"
Config Status: cfg=new, avail=yes, need=no, active=unknown
43: None 00.0: 10002 LCD Monitor
[Created at monitor.125]
Unique ID: rdCR.R7Dpg_aaVOC
Parent ID: _Znp.pq3kk9M9L4C
Hardware Class: monitor
Model: "LG Display LCD Monitor"
Vendor: LGD "LG Display"
Device: eisa 0x058b
Resolution: 2560x1440@60Hz
Size: 309x174 mm
Year of Manufacture: 2016
Week of Manufacture: 0
Detailed Timings #0:
Resolution: 2560x1440
Horizontal: 2560 2608 2640 2720 (+48 +80 +160) -hsync
Vertical: 1440 1450 1455 1481 (+10 +15 +41) +vsync
Frequencies: 241.69 MHz, 88.86 kHz, 60.00 Hz
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #38 (VGA compatible controller)
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu20
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2019-11-07 (130 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64
(20190805)
Package: gnome-shell 3.35.91-1ubuntu2
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
RelatedPackageVersions: mutter-common 3.35.91-1ubuntu1
Tags: third-party-packages focal
Uname: Linux 5.4.0-14-generic x86_64
UpgradeStatus: Upgraded to focal on 2020-03-04 (12 days ago)
UserGroups: microk8s sudo
_MarkForUpload: True
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