ubuntu – GRUB missing Window option after update

after window update yesterday, my PC which initially dual boot with Ubuntu alongside windows 10, has a missing “windows” option upon the grub start up.

i had tried to repair the PC with bootable windows 10 USB stick, still the same.

currently only can boot into Ubuntu.

In there, Ubuntu partition setting there, could see the windows 10 sit safe and sound, problem just it missing in the GRUB start up.

applications – Running services in developer options is missing

I want to check the apps that are running in the background to stop them.
Android 10
MIUI 12
redmi note 7s (NOT ROOTED)

i tried a lot of apps from playstore they doesn’t seem to work properly (Doesn’t show the amount of ram used and not able to force close or end the background apps).

I also tried the developer options but there was NO option for “running services” in the developer options, is there a way to enable this in developer options.

drivers – OpenGL rendering missing some triangles, why and how to fix

I’m using Ubuntu 20.10 in dual boot PC alongside Windows 7(32bit), just installed Ubuntu several weeks ago after RAM upgrade to 16GB. Everything works fine (after messy install) until several days ago, something happened… I see something wrong with the graphics, first noticed it in Minecraft, but then I found the issue in other applications too. This did not happen 2 weeks ago, and I don’t remember what change I did that could mess with graphics drivers. Attached image is glxgears screenshot, which shows missing triangles.
missing triangles in glxgears

This glitch also shows up in Blender, not seen with simple shapes like cylinders and cubes but visible in complex shapes like the monkey head. So I guess it is openGL issue.

In Windows, everything is normal.

What I have tried (and not working/found solution):

  • Google for “openGL missing triangles”
  • purge-ppa from ppa:oibaf/graphics-drivers then reinstall latest update from that ppa

This is the output from “lshw -c video”:

 *-display                 
       description: VGA compatible controller
       product: Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:27 memory:f7800000-f7bfffff memory:e0000000-efffffff ioport:f000(size=64) memory:c0000-dffff

This is the output from “glxinfo -B”:

name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Intel Open Source Technology Center (0x8086)
    Device: Mesa DRI Intel(R) HD Graphics 2500 (IVB GT1) (0x152)
    Version: 21.2.0
    Accelerated: yes
    Video memory: 1536MB
    Unified memory: yes
    Preferred profile: core (0x1)
    Max core profile version: 4.2
    Max compat profile version: 3.0
    Max GLES1 profile version: 1.1
    Max GLES(23) profile version: 3.0
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 2500 (IVB GT1)
OpenGL core profile version string: 4.2 (Core Profile) Mesa 21.2.0-devel (git-a165385 2021-04-17 groovy-oibaf-ppa)
OpenGL core profile shading language version string: 4.20
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 3.0 Mesa 21.2.0-devel (git-a165385 2021-04-17 groovy-oibaf-ppa)
OpenGL shading language version string: 1.30
OpenGL context flags: (none)

OpenGL ES profile version string: OpenGL ES 3.0 Mesa 21.2.0-devel (git-a165385 2021-04-17 groovy-oibaf-ppa)
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00

The glitch even appears when I’m writing this question, see the image:
missing triangles in windowed application

What happened here, and how to fix it? I would prefer not to fresh-install Ubuntu, since it was messy with the boot settings and downloading again all the apps.

vCenter 7: Catalina Logs filing up, tomcat-users.xml missing?

We were receiving errors on our vCenter servers that the log disk is getting low on disk space. According to VMWare KBs we checked what is consuming space. We found espiecially a lot of log files named “catalina_(DATE).log” with 11mb size, going back almost a year.

I checked the content of the log, and every 10 minutes it creates the same error message:

2021-04-12T23:59:53.056Z WARN org.apache.catalina.users.MemoryUserDatabase Failed to close (conf/tomcat-users.xml)
java.io.FileNotFoundException: /usr/lib/vmware-sso/vmware-sts/conf/tomcat-users.xml (No such file or directory)
    at java.io.FileInputStream.open0(Native Method)
    at java.io.FileInputStream.open(FileInputStream.java:195)
    at java.io.FileInputStream.<init>(FileInputStream.java:138)
    at java.io.FileInputStream.<init>(FileInputStream.java:93)
    at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
    at org.apache.catalina.users.MemoryUserDatabase.backgroundProcess(MemoryUserDatabase.java:700)
    at org.apache.catalina.realm.UserDatabaseRealm.backgroundProcess(UserDatabaseRealm.java:160)
    at org.apache.catalina.realm.CombinedRealm.backgroundProcess(CombinedRealm.java:308)
    at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1145)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1353)
    at java.lang.Thread.run(Thread.java:748)

Veeam simply tells me to delete the files and to enlarge my log disk, which I did. But it still bugged me what is going on, and so far I did not find anthing in the web related to vCenter.

Anyone has an idea what is going on here, and how to resolve this error? I know that there are many ways to ignore it, and maybe it is safe to ignore it, but I only want to know if the error itself can be fixed.

ms office – Word for Mac – Missing Documents in file locations settings – cannot set default folder for saving documents

Q: How to set the default folder for saving a Word document when the option is missing in File Locations?

I want to set the default path or folder for saving Word documents. However when opening Settings and clicking on File Locations there is no option to set a folder for Documents. It is missing and I cannot add it. Logging in as an admin doesn’t change it.

missing Documents option in File Location settings

multisite – Missing or invalid site address

I have a multisite with parked subdomains. The IPs on the parked domains are all set to point to the admin/main site, the DNS likewise. Two subdomains were set up last year seem to work fine. Adding two more now fail returning the error ‘Missing or invalid site address’.

The wp-config seems to be correctly set for domains and the URL seems to be correct in phpmyadmin. Disabling plugins has no effect, restoring from backup has no effect, but I haven’t been using the site for some weeks. I am the only admin. The webhost support looked into it but can’t see the problem and tell me it’s not server related (ie not their problem).

differential equations – NSolve missing solutions

I’m having trouble solving the transcendental equation. For some values ​​of bi, NSolve obtains 6 roots, however when changing the value, it obtains 5. Graphing the function clearly shows that the root that is missing exists and is in the interval between 10 and 11.

This is the code running all the roots correctly

bi=0.515625;
g((Beta)_):=((Beta)*BesselJ(1, (Beta)))-(bi*BesselJ(0,(Beta)));
roots=((Beta)/.NSolve({g((Beta))==0,0<=(Beta)<=18},(Beta)))
Plot(g((Beta)), {(Beta), 0, 18}, PlotRange -> {-5, 5},Epilog -> {Red, AbsolutePointSize(6), Point({#, 0} & /@ roots)})

And this is the same code with another bi value

bi=1.27188;
g((Beta)_):=((Beta)*BesselJ(1, (Beta)))-(bi*BesselJ(0,(Beta)));
roots=((Beta)/.NSolve({g((Beta))==0,0<=(Beta)<=18},(Beta)))
Plot(g((Beta)), {(Beta), 0, 18}, PlotRange -> {-5, 5},Epilog -> {Red, AbsolutePointSize(6), Point({#, 0} & /@ roots)})