All system menus, as well as dolphin and other apps totally unreadable because of overlap

[Chris Bertin]

A few minutes/seconds after a system restart, all menus become unreadable. First, the text is no longer centered, then any kind of scrolling or change of screen result in the new text being displayed on top of the previous content. I have been using Linux/KDE/[K]Ubuntu for 20 years and I have never seen anything like this. I have googled for hours and have not been able to find any information. One screenshots is attached. It is very hard to add more because 'Choose file' is just as messed up as all other system menus/apps and finding the right file is very challenging...

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: plasma-desktop 4:4.11.11-0ubuntu0.2
ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
Uname: Linux 3.13.0-68-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: KDE
Date: Sat Nov 21 09:46:26 2015
InstallationDate: Installed on 2015-04-26 (209 days ago)
InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: kde-workspace
UpgradeStatus: No upgrade log present (probably fresh install)

[Chris Bertin (chris-bertin)]

I hope you guys have a solution! Thanks!

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

@Chris: can you pls post output of (terminal-commands):

java -version

and

dpkg-query -l java* | grep ^ii

dpkg-query -l icedtea * | grep ^ii

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

typo correction: dpkg-query - l icetea* [ grep ^ii

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Could be a duplicate of https://bugs.launchpad.net/debian/+source/openjdk-7/+bug/1512760 title: Java applications leaks shmem chunks

See also https://askubuntu.com/questions/697515/graphical-issue-with-kubuntu (12.04.01 / fully-udated) – bit lenghty because of analysing and Kub 12.04 can't just install OpenJDK-8

[Chris Bertin (chris-bertin)]

$ script
Script started, file is typescript
$ java -version
java version "1.7.0_85"
OpenJDK Runtime Environment (IcedTea 2.6.1) (7u85-2.6.1-5ubuntu0.14.04.1)
OpenJDK 64-Bit Server VM (build 24.85-b03, mixed mode)
$ dpkg-query -l java* | grep ^ii
ii java-common 0.51 all Base of all Java packages
ii javascript-com 11 all Base support for JavaScript libra
$ dpkg-query -l icedtea * | grep ^ii
dpkg-query: no packages found matching icedtea
dpkg-query: no packages found matching Monitor$1.class
dpkg-query: no packages found matching Monitor.class
dpkg-query: no packages found matching Monitor.java
dpkg-query: no packages found matching Monitor$MonWindowHandler.class
dpkg-query: no packages found matching Monitor$Mtable$1.class
dpkg-query: no packages found matching Monitor$Mtable$2.class
dpkg-query: no packages found matching Monitor$Mtable$ButtonListener.class
dpkg-query: no packages found matching Monitor$Mtable.class
dpkg-query: no packages found matching Monitor$Mtable$MultiLineHeaderRenderer.class
dpkg-query: no packages found matching Monitor$Mtable$TblMenuHandler.class
dpkg-query: no packages found matching Monitor$Surface.class
dpkg-query: no packages found matching Perfdmon.class
dpkg-query: no packages found matching Perfdmon.java
dpkg-query: no packages found matching Perfdmon$Jpoll.class
dpkg-query: no packages found matching Pipe.class
dpkg-query: no packages found matching Pipe.java
dpkg-query: no packages found matching SCCS
dpkg-query: no packages found matching TableMap.class
dpkg-query: no packages found matching TableMap.java
dpkg-query: no packages found matching TableSorter$1.class
dpkg-query: no packages found matching TableSorter.class
dpkg-query: no packages found matching TableSorter.java
dpkg-query: no packages found matching typescript
dpkg-query: no packages found matching WindowHandler.class
dpkg-query: no packages found matching WindowHandler.java
$
Script done, file is typescript

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

lshw -c display

lspci -nnk | grep -iA2 vga

egrep "EE|WW" /var/log/Xorg.*

tail -n 50 ~/.xsession-errors

qdbus org.kde.kwin /KWin supportInformation

Would be nice to use http://pastebin.ubuntu.com/ for the results.

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

You could also just install OpenJDK-8. se (https://bugs.kde.org/show_bug.cgi?id=350976) [status=resolved downstream]

[Chris Bertin (chris-bertin)]

http://pastebin.ubuntu.com/13425158/

Thanks!

Chris (<email address hidden> or <email address hidden>)

On Sat, Nov 21, 2015 at 2:50 PM, Flames_in_Paradise <
<email address hidden>> wrote:

> lshw -c display
>
> lspci -nnk | grep -iA2 vga
>
> egrep "EE|WW" /var/log/Xorg.*
>
> tail -n 50 ~/.xsession-errors
>
> qdbus org.kde.kwin /KWin supportInformation
>
> Would be nice to use http://pastebin.ubuntu.com/ for the results.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1518597
>
> Title:
> All system menus, as well as dolphin and other apps totally unreadable
> because of overlap
>
> Status in kde-workspace package in Ubuntu:
> New
>
> Bug description:
> A few minutes/seconds after a system restart, all menus become
> unreadable. First, the text is no longer centered, then any kind of
> scrolling or change of screen result in the new text being displayed
> on top of the previous content. I have been using Linux/KDE/[K]Ubuntu
> for 20 years and I have never seen anything like this. I have googled
> for hours and have not been able to find any information. One
> screenshots is attached. It is very hard to add more because 'Choose
> file' is just as messed up as all other system menus/apps and finding
> the right file is very challenging...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: plasma-desktop 4:4.11.11-0ubuntu0.2
> ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
> Uname: Linux 3.13.0-68-generic x86_64
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: amd64
> CurrentDesktop: KDE
> Date: Sat Nov 21 09:46:26 2015
> InstallationDate: Installed on 2015-04-26 (209 days ago)
> InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
> (20140722.2)
> SourcePackage: kde-workspace
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1518597/+subscriptions
>

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

As suggested b4 -> OpenJDK-8

The alternatives-sstem will pull that in front then. Won't hurt.

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

* The alternatives-sstem will pull that in front then. Won't hurty.

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

 * The alternatives-system will pull that in front then. Won't hurt. (my "y"-keycap is gone)

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

@Chris,

could U kindly give feedback if this solveld the issue? If so, I will transfer this bugreport to the
[master-bugreport] (Java OpenJDK-7) to make severity count up.

[Chris Bertin (chris-bertin)]

Sorry for the late reply. I was out. No the problem is not fixed,
unfortunately. Thanks,

Chris (<email address hidden> or <email address hidden>)

On Sat, Nov 21, 2015 at 4:16 PM, Flames_in_Paradise <
<email address hidden>> wrote:

> @Chris,
>
> could U kindly give feedback if this solveld the issue? If so, I will
> transfer this bugreport to the
> [master-bugreport] (Java OpenJDK-7) to make severity count up.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1518597
>
> Title:
> All system menus, as well as dolphin and other apps totally unreadable
> because of overlap
>
> Status in kde-workspace package in Ubuntu:
> New
>
> Bug description:
> A few minutes/seconds after a system restart, all menus become
> unreadable. First, the text is no longer centered, then any kind of
> scrolling or change of screen result in the new text being displayed
> on top of the previous content. I have been using Linux/KDE/[K]Ubuntu
> for 20 years and I have never seen anything like this. I have googled
> for hours and have not been able to find any information. One
> screenshots is attached. It is very hard to add more because 'Choose
> file' is just as messed up as all other system menus/apps and finding
> the right file is very challenging...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: plasma-desktop 4:4.11.11-0ubuntu0.2
> ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
> Uname: Linux 3.13.0-68-generic x86_64
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: amd64
> CurrentDesktop: KDE
> Date: Sat Nov 21 09:46:26 2015
> InstallationDate: Installed on 2015-04-26 (209 days ago)
> InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
> (20140722.2)
> SourcePackage: kde-workspace
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1518597/+subscriptions
>

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

see https://askubuntu.com/questions/697623/ubuntu-15-10-display-blur-lines-and-hang-issue-with-intel-core-2-cpu/701216#701216

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Your graphics is https://en.wikipedia.org/wiki/Intel_GMA#GMA_3000 (2006.6)

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Since U reported it's barely useable U could probabely try it w/o 3D-Acceleration. To switch it off press ALT+ shift +F12 (that temporarely turns it off) I've permanentely turned it off on my 2nd machine, an old Dell D600. Via "Systemsettings -> graphical effects -> enhanced"

And remember if the system seems to be completely borked you still have the repair-chance to make use of the chroot-method from a Live-CD -> https://help.ubuntu.com/community/LiveCdRecovery#Update_Failure

[Chris Bertin (chris-bertin)]

Well, that didn't work and my system setting menu doesn't have 'graphical
effects' but I think you pointed me in the right direction!! I also noticed
that what seemed to trigger the problem was to play embedded videos in a
browser, which explains why things sometimes would work for quite a while
and sometimes would mess up quickly.

So, after trying a few things that didn't work, I changed:

System Settings -> Desktop effects -> Advanced -> Composition type: OpenGL
2.0 instead of XRender
System Settings -> Desktop effects -> Advanced -> Qt graphics: Native
instead of Raster.

And, so far, so good, assuming the trigger was indeed embedded videos. I
will keep these settings and see if that fixes the problem.

Thanks!!!

Chris (<email address hidden> or <email address hidden>)

On Sun, Nov 22, 2015 at 1:59 PM, Flames_in_Paradise <
<email address hidden>> wrote:

> Since U reported it's barely useable U could probabely try it w/o 3D-
> Acceleration. To switch it off press ALT+ shift +F12 (that temporarely
> turns it off) I've permanentely turned it off on my 2nd machine, an old
> Dell D600. Via "Systemsettings -> graphical effects -> enhanced"
>
> And remember if the system seems to be completely borked you still have
> the repair-chance to make use of the chroot-method from a Live-CD ->
> https://help.ubuntu.com/community/LiveCdRecovery#Update_Failure
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1518597
>
> Title:
> All system menus, as well as dolphin and other apps totally unreadable
> because of overlap
>
> Status in kde-workspace package in Ubuntu:
> New
>
> Bug description:
> A few minutes/seconds after a system restart, all menus become
> unreadable. First, the text is no longer centered, then any kind of
> scrolling or change of screen result in the new text being displayed
> on top of the previous content. I have been using Linux/KDE/[K]Ubuntu
> for 20 years and I have never seen anything like this. I have googled
> for hours and have not been able to find any information. One
> screenshots is attached. It is very hard to add more because 'Choose
> file' is just as messed up as all other system menus/apps and finding
> the right file is very challenging...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: plasma-desktop 4:4.11.11-0ubuntu0.2
> ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
> Uname: Linux 3.13.0-68-generic x86_64
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: amd64
> CurrentDesktop: KDE
> Date: Sat Nov 21 09:46:26 2015
> InstallationDate: Installed on 2015-04-26 (209 days ago)
> InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
> (20140722.2)
> SourcePackage: kde-workspace
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1518597/+subscriptions
>

[Chris Bertin (chris-bertin)]

I spoke too soon! All messed up again...

 $ uptime
 16:42:13 up 1:02, 5 users, load average: 1.56, 0.85, 0.92

And I have no idea what caused it... I don't think I did anything that I
had not done before... Crazy...

Chris (<email address hidden> or <email address hidden>)

On Sun, Nov 22, 2015 at 1:59 PM, Flames_in_Paradise <
<email address hidden>> wrote:

> Since U reported it's barely useable U could probabely try it w/o 3D-
> Acceleration. To switch it off press ALT+ shift +F12 (that temporarely
> turns it off) I've permanentely turned it off on my 2nd machine, an old
> Dell D600. Via "Systemsettings -> graphical effects -> enhanced"
>
> And remember if the system seems to be completely borked you still have
> the repair-chance to make use of the chroot-method from a Live-CD ->
> https://help.ubuntu.com/community/LiveCdRecovery#Update_Failure
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1518597
>
> Title:
> All system menus, as well as dolphin and other apps totally unreadable
> because of overlap
>
> Status in kde-workspace package in Ubuntu:
> New
>
> Bug description:
> A few minutes/seconds after a system restart, all menus become
> unreadable. First, the text is no longer centered, then any kind of
> scrolling or change of screen result in the new text being displayed
> on top of the previous content. I have been using Linux/KDE/[K]Ubuntu
> for 20 years and I have never seen anything like this. I have googled
> for hours and have not been able to find any information. One
> screenshots is attached. It is very hard to add more because 'Choose
> file' is just as messed up as all other system menus/apps and finding
> the right file is very challenging...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: plasma-desktop 4:4.11.11-0ubuntu0.2
> ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
> Uname: Linux 3.13.0-68-generic x86_64
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: amd64
> CurrentDesktop: KDE
> Date: Sat Nov 21 09:46:26 2015
> InstallationDate: Installed on 2015-04-26 (209 days ago)
> InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
> (20140722.2)
> SourcePackage: kde-workspace
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1518597/+subscriptions
>

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Chris, missing informatio - does the system show the same errors when you deactivate the effects?

Anyway, as far as I remember, the "Blur"-effect was always buggy. Try to deactivate it.

The kubuntu-backports-ppa provides fixes which will not arrive through the normal backports-channel. [1] [2]

[1] (http://wire.kubuntu.org/?p=419 - title: KDE 4.14.3 Bugfix release for Kubuntu Trusty (14.04.3 LTS) is now available.)
[2] (https://launchpad.net/~kubuntu-ppa/+archive/ubuntu/backports)

With regards to the age of the integrated graphics I would not assume it's capable of running OpenGL 2.0

If U suspect Abobe-Flash to have a cause make shure U run the newest version by activating the "Partners"-repository, also look at the "right-click options in embedded video. Best suggestion here to try2avoid Flash (make use of HTML5!)

> ... I don't think I did anything that I
had not done before... Crazy...

Make also a physical inspection of the motherboard and it's components inspect vents, Kondensators, run a RAM-check (due to the age). A fact: if effects appear after a while running, this may actually speak for HWE constraint. Since other know serios causes were exluded.

<OT> I'd actually build a new tiny new PC 4myself & KDE5 a while ago, Processor has socket AM1, CPU 4x1.3 GHz - all2gether less than 200$ - (I do not play games, though) <OT>

Excuses 4 late reply.

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Addition: If U consider to install the packages from the backports-ppa, make sure to run: sudo apt-get -install kubuntu-desktop

[Chris Bertin (chris-bertin)]

I have had kubuntu-desktop installed since day one, AFAIK. And running this
shows no updates:

# apt-get install kubuntu-desktop
Reading package lists... Done
Building dependency tree
Reading state information... Done
kubuntu-desktop is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Chris (<email address hidden> or <email address hidden>)

On Mon, Nov 23, 2015 at 3:16 PM, Flames_in_Paradise <
<email address hidden>> wrote:

> Addition: If U consider to install the packages from the backports-ppa,
> make sure to run: sudo apt-get -install kubuntu-desktop
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1518597
>
> Title:
> All system menus, as well as dolphin and other apps totally unreadable
> because of overlap
>
> Status in kde-workspace package in Ubuntu:
> New
>
> Bug description:
> A few minutes/seconds after a system restart, all menus become
> unreadable. First, the text is no longer centered, then any kind of
> scrolling or change of screen result in the new text being displayed
> on top of the previous content. I have been using Linux/KDE/[K]Ubuntu
> for 20 years and I have never seen anything like this. I have googled
> for hours and have not been able to find any information. One
> screenshots is attached. It is very hard to add more because 'Choose
> file' is just as messed up as all other system menus/apps and finding
> the right file is very challenging...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: plasma-desktop 4:4.11.11-0ubuntu0.2
> ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
> Uname: Linux 3.13.0-68-generic x86_64
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: amd64
> CurrentDesktop: KDE
> Date: Sat Nov 21 09:46:26 2015
> InstallationDate: Installed on 2015-04-26 (209 days ago)
> InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
> (20140722.2)
> SourcePackage: kde-workspace
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1518597/+subscriptions
>

[Chris Bertin (chris-bertin)]

Not quite sure what you mean. But I ran this:

# apt-get install kde-workspace
Reading package lists... Done
Building dependency tree
Reading state information... Done
kde-workspace is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Chris (<email address hidden> or <email address hidden>)

On Mon, Nov 23, 2015 at 6:41 PM, Flames_in_Paradise <
<email address hidden>> wrote:

> ** Changed in: kde-workspace (Ubuntu)
> Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1518597
>
> Title:
> All system menus, as well as dolphin and other apps totally unreadable
> because of overlap
>
> Status in kde-workspace package in Ubuntu:
> Incomplete
>
> Bug description:
> A few minutes/seconds after a system restart, all menus become
> unreadable. First, the text is no longer centered, then any kind of
> scrolling or change of screen result in the new text being displayed
> on top of the previous content. I have been using Linux/KDE/[K]Ubuntu
> for 20 years and I have never seen anything like this. I have googled
> for hours and have not been able to find any information. One
> screenshots is attached. It is very hard to add more because 'Choose
> file' is just as messed up as all other system menus/apps and finding
> the right file is very challenging...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: plasma-desktop 4:4.11.11-0ubuntu0.2
> ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
> Uname: Linux 3.13.0-68-generic x86_64
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: amd64
> CurrentDesktop: KDE
> Date: Sat Nov 21 09:46:26 2015
> InstallationDate: Installed on 2015-04-26 (209 days ago)
> InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
> (20140722.2)
> SourcePackage: kde-workspace
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1518597/+subscriptions
>

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

There are open questions that don't get responded.

[Chris Bertin (chris-bertin)]

OK. Just FYI, I was on 14.XX ever since it came out. When 15.XX came out,
April, IIRC, I upgraded but I didn't like it and I went back to 14.XX.
These problems just started to happen a couple of weeks ago. I had not had
any issues like this previously.

Chris (<email address hidden> or <email address hidden>)

On Mon, Nov 23, 2015 at 8:13 PM, Flames_in_Paradise <
<email address hidden>> wrote:

> There are open questions that don't get responded.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1518597
>
> Title:
> All system menus, as well as dolphin and other apps totally unreadable
> because of overlap
>
> Status in kde-workspace package in Ubuntu:
> Incomplete
>
> Bug description:
> A few minutes/seconds after a system restart, all menus become
> unreadable. First, the text is no longer centered, then any kind of
> scrolling or change of screen result in the new text being displayed
> on top of the previous content. I have been using Linux/KDE/[K]Ubuntu
> for 20 years and I have never seen anything like this. I have googled
> for hours and have not been able to find any information. One
> screenshots is attached. It is very hard to add more because 'Choose
> file' is just as messed up as all other system menus/apps and finding
> the right file is very challenging...
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: plasma-desktop 4:4.11.11-0ubuntu0.2
> ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
> Uname: Linux 3.13.0-68-generic x86_64
> ApportVersion: 2.14.1-0ubuntu3.19
> Architecture: amd64
> CurrentDesktop: KDE
> Date: Sat Nov 21 09:46:26 2015
> InstallationDate: Installed on 2015-04-26 (209 days ago)
> InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64
> (20140722.2)
> SourcePackage: kde-workspace
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1518597/+subscriptions
>

[Chris Bertin (chris-bertin)]

OK, major progress in isolating this issue, at least the root cause. Culprit is java and the fact that it now creates thousands of shared memory segments, for some reason (I am not running any java app I have not been running for months or years but I did rebuild one using the latest jdk). The messed up display issue arises when all shmem segments are busy. All of them have a zero key, some of them claim to have 1 and other 2 processes attached. Most but not all of them have the same size:

$ ipcs -m
...
0x00000000 86018571 chrisb 600 42864 1 dest
0x00000000 86051340 chrisb 600 91200 1 dest
0x00000000 86084109 chrisb 600 91200 1 dest
0x00000000 86149646 chrisb 600 42864 1 dest
0x00000000 86182415 chrisb 600 42864 1 dest
0x00000000 86215184 chrisb 600 236400 1 dest
...
0x00000000 135040993 chrisb 600 1690076 1 dest
0x00000000 135073762 chrisb 600 1690076 1 dest
0x00000000 135106531 chrisb 600 1690076 1 dest
0x00000000 135139300 chrisb 600 1690076 1 dest
0x00000000 135172069 chrisb 600 1690076 1 dest
0x00000000 135204838 chrisb 600 1690076 1 dest
0x00000000 135237607 chrisb 600 1690076 1 dest
0x00000000 135270376 chrisb 600 1690076 1 dest
0x00000000 135303145 chrisb 600 1690076 1 dest
0x00000000 135335914 chrisb 600 1690076 1 dest
0x00000000 135368683 chrisb 600 1690076 1 dest
0x00000000 135401452 chrisb 600 1690076 1 dest
0x00000000 135434221 chrisb 600 1690076 1 dest
0x00000000 135466990 chrisb 600 1690076 1 dest
0x00000000 135499759 chrisb 600 1690076 1 dest
0x00000000 135532528 chrisb 600 1690076 1 dest
0x00000000 135565297 chrisb 600 1690076 1 dest
0x00000000 135598066 chrisb 600 1690076 1 dest
0x00000000 135630835 chrisb 600 1690076 1 dest
0x00000000 135663604 chrisb 600 1690076 1 dest
0x00000000 135696373 chrisb 600 1690076 1 dest
0x00000000 135729142 chrisb 600 1690076 1 dest
0x00000000 135761911 chrisb 600 1690076 1 dest
0x00000000 135794680 chrisb 600 1690076 1 dest
0x00000000 135827449 chrisb 600 1690076 1 dest
0x00000000 135860218 chrisb 600 1690076 1 dest
0x00000000 135892987 chrisb 600 1690076 1 dest
0x00000000 135925756 chrisb 600 16...

[Chris Bertin (chris-bertin)]

I linked the java and javac in /etc/alternatives back to the 1.6 versions and the problem is gone.

I should have caught this earlier by looking more closely at:

https://bugs.launchpad.net/debian/+source/openjdk-7/+bug/1512760 title: Java applications leaks shmem chunks

I checked the number of shmem segments too early... And the leak is not linear. Sometimes hundreds of segments are leaked in a few seconds, sometimes none or very few.

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Fine, Chris.

Since it's only a workaround to degrade Java OpenJDK-7 in Kubuntu 14.04 to V.6 would sugest to leave it open until the fix is released/commited & published. This may well take some more time, for whatever reason in question. I'll associate this than to the package in question, as duplicate..

best wishes

[Chris Bertin (chris-bertin)]

OK, thanks a lot for the help!! Love Linux!!