Public bug reported:
Sometimes a window stopped refreshing its contents. Different applications
affected: known examples include xterm, Firefox, CodeBlocks, KDE lock screen.
No way found to revive in-time refreshing except full window closing (or blind
login, in case of KDE lock screen). Keyboard or mouse activity in a such window
doesn't help.
A one-shot refresh can be easily caused by switching to another virtual desktop
and then back. After such switching, a window refresh is active for
approximately 0.5 seconds, then stops again.
No relation to host uptime or X session uptime is visible.
Observed on two different hosts, both carrying Kubuntu 16.04 and running
XWindow+KDE as desktop environment. KDE is standard Kubuntu one.
Multiple virtual desktops are used on both hosts.
The issue started to appear approximately 4-5 months ago but I can't
specify exact package change that could have caused it. Both hosts are
regularly updated (no more than 1 week delay).
The first host has:
video: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] Turks XT [Radeon HD 6670/7670] (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Turks XT [Radeon HD 6670/7670]
Kernel driver in use: radeon
Kernel modules: radeon
CPU: AMD FX-8150
RAM: 16GB
Installed as Kubuntu 14.04, upgraded to 16.04 via do-release-upgrade.
current kernel: linux-image-4.4.0-112-generic
video packages: non-HWE series (e.g. xserver-xorg=1:7.7+13ubuntu3); active
driver: radeon
Issue rate on this host is rather tiny (~1 per week).
The second one has:
video: 01:00.0 VGA compatible controller: NVIDIA Corporation Device 128b (rev
a1) (prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. [MSI] Device 8c93
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nouveau, nvidia_384_drm, nvidia_384
(really this is GeForce GT 740)
CPU:Intel i3-4170
RAM: 16GB
Installed originally as Kubuntu 16.04
current kernel: linux-image-4.13.0-32-generic (depended on by
linux-generic-hwe-16.04)
video packages: HWE series (e.g.
xserver-xorg-hwe-16.04=1:7.7+16ubuntu3~16.04.1); active driver: nvidia
(proprietary), but the same issue observed with VESA driver.
Issue rate on this host is 1-2 per day and was much higher with VESA
driver in use.
No respective messages are found in Xorg.*.log or ~/.xsession-errors,
but the latter has got stream of messages like:
at host with AMD and Radeon:
kscreen: Primary output changed from KScreen::Output(Id: 86 , Name: "HDMI-0" )
( "HDMI-0" ) to KScreen::Output(Id: 86 , Name: "HDMI-0" ) ( "HDMI-0" )
kscreen: Primary output changed from KScreen::Output(Id: 86 , Name: "HDMI-0" )
( "HDMI-0" ) to KScreen::Output(Id: 86 , Name: "HDMI-0" ) ( "HDMI-0" )
at host with Intel and Nvidia:
kscreen: Primary output changed from KScreen::Output(Id: 640 , Name: "DVI-D-0"
) ( "DVI-D-0" ) to KScreen::Output(Id: 640 , Name: "DVI-D-0" ) ( "DVI-D-0" )
kscreen: Primary output changed from KScreen::Output(Id: 640 , Name: "DVI-D-0"
) ( "DVI-D-0" ) to KScreen::Output(Id: 640 , Name: "DVI-D-0" ) ( "DVI-D-0" )
such messages started appearing approximately at the same time, plus-
minus 1-2 months.
Additional info can be provided on demand.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-112.135-generic 4.4.98
Uname: Linux 4.4.0-112-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Feb 13 11:47:32 2018
InstallationDate: Installed on 2014-12-16 (1154 days ago)
InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.2)
SourcePackage: xorg
UpgradeStatus: Upgraded to xenial on 2017-03-29 (321 days ago)
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1749150
Title:
Spontaneous single window freezing
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https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1749150/+subscriptions
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